PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 10-W, 36-V to 75-V INPUT, 1500-V ISOLATION, DC/DC CONVERTERS FEATURES APPLICATIONS * * * * * * * * * * * * * * * * * * * Input Voltage: 36 V to 75 V 10-W Total Output Power Output Voltages: 3.3 V, 5 V, and 12 V Output Voltage Trim 10% Up To 87% Efficiency Overcurrent Protection Input Undervoltage Lockout Output Overvoltage Protection Positive or Negative Logic Enable Control Option Synchronization Option Space-Saving, Industry Standard Footprint (1.1 in x 1.0 in) / (27.94 mm x 24.38 mm) Industry Standard Pinout Surface Mount Package 1500-Vdc Isolation Agency Approvals: UL/IEC/CSA-C22.2 60950-1 Intermediate Bus Architectures Telecom, High-End Computing Platforms Power Over Ethernet Applications Multi-Rail Power Systems DESCRIPTION The PTMA40XX is a series of 10-W rated isolated dc/dc converters, designed to operate from a standard -48-V telecom central office supply. Housed in an industry standard 1.1 in x 1.0 in (27.94 mm x 24.38 mm) package, this series of isolated modules is set to one of the common intermediate bus voltages of 3.3 V, 5 V, or 12 V. The PTMA40XX series includes many features expected of high-performance dc/dc converter modules. Operational features include an input undervoltage lockout (UVLO) and a dual-logic output enable control or synchronization option. Overcurrent protection ensures survival against load faults. Typical applications include distributed power architectures in both telecom and computing environments, power over ethernet, and particularly complex digital systems requiring multiple power supply rails. TYPICAL APPLICATION 1 CI 47 F (optional) VO+ 4 VI+ PTMA40XXXX 2 VI- RTRIM(down) (optional) Trim 5 RTRIM(up) (optional) 3 Enable/Sync CO 47 F (optional) VO- 6 UDG-06003 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright (c) 2006-2007, Texas Instruments Incorporated PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see the TI website at www.ti.com. PART NUMBERING SCHEME Input Voltage Output Current 4 02 4 = 48 V 01 = 1 A 033 = 3.3 V A = None 1 = None D = Through-hole, Pb-free Blank = Tray 02 = 2 A 050 = 5.0 V N = Negative 2 = VO Adjust S = SMD, SnPb solder ball T = Tape and Reel 03 = 3 A 120 = 12.0 V P = Positive 3 = VO Adjust & Syncronization Z = SMD, SnAgCu solder ball PTMA Output Voltage 050 Enable Electrical Options P 2 Pin Style A Shipping Package D T ABSOLUTE MAXIMUM RATINGS UNIT Continuous VI Input Voltage TA Operating temperature range Over VI range TWAVE Wave solder temperature Surface temperature of module or pins (20 seconds) TREFLOW Solder reflow temperature Surface temperature of module or pins (20 seconds) TSTG Storage temperature PO Output Power (1) (2) Surge, 1 s max 75 V 100 V (1) -40C to 85C AD suffix 260C (2) AS suffix 235C (2) AZ suffix 260C (2) -55C to 125C 10 W The converter's internal protection circuitry may cause the output to turn off when the applied input voltage is greater than 75 V. During solder reflow of SMD package version, do not elevate the module PCB, pins, or internal component temperatures beyond this peak temperature. PACKAGE SPECIFICATIONS UNITS Weight Flammability Meets UL94V-O Mechanical shock Per Mil-STD-883D, Method 2002.3, 1 ms, 1/2 Sine, mounted Mechanical vibration Mil-STD-883D, Method 2007.2, 20-2000 Hz, PCB mounted Reliability Telcordia SR-332 50% stress, TA = 40C, ground benign (1) 2 6.5 grams Qualification limit. Submit Documentation Feedback 500 G (1) Horizontal SMD (Suffix AS & AZ) 500 G (1) Horizontal T/H (Suffix AD) 20 G (1) Horizontal SMD (Suffix AS & AZ) 10 G (1) Horizontal T/H (Suffix AD) MTBF 7.3 106 Hr PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 PTMA403033 ELECTRICAL CHARACTERISTICS TA = 25C, VI = 48 V, VO = 3.3 V, CI = 0 F, CO = 0 F, and IO = IOmax (Unless otherwise stated) PARAMETER PO Output power PTMA403033 TEST CONDITIONS MIN Output current Over VI range ILIM Current Limit Threshold Shutdown, followed by autorecovery VI Input voltage range Over IO range 0.1 (1) 3 36 W (2) A A 48 2 UNIT 10 4.25 Set-point voltage tolerance MAX Over VI range IO VO TYP 75 V (3) %VO Temperature variation -40C TA 85C 1 %VO Line regulation Over VI range 3 mV Load regulation Over IO range 10 Total output voltage variation Includes set-point, line, load, -40C TA 85C Trim adjust range Over VI range Efficiency PO = POmax VO Ripple (peak-to-peak) 20-MHz bandwidth Transient response 0.1 A/s load step, 50% to 100% IOmax Referenced to VI- Output enable input (pin 3) 3 3.0 (3) 3.6 %VO V 82% 65 mVpp Recovery time 750 s VO over/undershoot 150 Input high voltage (VIH) 4.5 Input low voltage (VIL) -0.2 mV Open (4) 0.8 Input low current (IIL) Standby input current mV 5 1 Pin 3 open V mA 8 mA UVLO Undervoltage lockout 32 34 V OVP Output Overvoltage Protection 3.7 5.4 V S Switching frequency 300 350 kHz (5) 250 Sync switching frequency SYNC Over VI and IO ranges (non-Sync option) 250 Free-running 180 Synchronization range 6 0.5 V 25 75 % External input capacitance Isolation voltage CISO Isolation capacitance RISO Isolation resistance (5) (6) kHz 3.5 External output capacitance (4) (5) -0.3 VISO (2) (3) 350 low-level input voltage CO (1) (5) high-level input voltage clock duty cycle CI 250 215 0 47 0 (6) 47 1,500 Primary-Secondary F 1000 F Vdc 1,100 10 V pF M The converter requires a minimum load current for proper operation. However, the converter is not damaged when operated under a no-load condition. See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures. The set-point voltage tolerance is affected by the tolerance and stability of RTRIM. The stated limit is unconditionally met if RTRIM has a tolerance of 1%, with 100 ppm/C temperature stability. The Enable input (pin 3) has an internal pullup resistor. Do not place an external pullup resistor on this input pin. If the enable feature is not used, for a positive enable device this input should be left open circuit and a negative enable device should be permanently connected to VI- (pin 2). A discrete MOSFET or bipolar transistor is recommended for the enable control. The open-circuit voltage is typically less than 5 V. See the Application Information for a more detailed description. A device with the synchronization option has a reduced switching frequency of 215 kHz typical. The synchronization frequency can only be adjusted to a higher frequency, up to 350 kHz maximum. An output capacitor is not required for proper operation. However, additional capacitance at the load improves the transient response. Submit Documentation Feedback 3 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 PTMA402050 ELECTRICAL CHARACTERISTICS TA = 25C, VI = 48 V, VO = 5 V, CI = 0 F, CO = 0 F, and IO = IOmax (Unless otherwise stated) PARAMETER PO Output power PTMA402050 TEST CONDITIONS MIN Output current Over VI range ILIM Current Limit Threshold Shutdown, followed by autorecovery VI Input voltage range Over IO range 0.1 (1) 2 36 %VO mV Over VI range 5 Load regulation Over IO range 10 Total output voltage variation Includes set-point, line, load, -40C TA 85C Trim adjust range Over VI range Efficiency PO = POmax VO Ripple (peak-to-peak) 20-MHz bandwidth Transient response 0.1 A/s load step, 50% to 100% IOmax 3 4.5 mV 5 (3) 5.5 %VO V 85% 55 mVpp Recovery time 250 s VO over/undershoot 150 Input high voltage (VIH) 4.5 Input low voltage (VIL) -0.2 mV Open (4) 0.8 Input low current (IIL) 1 Pin 3 open V mA 8 mA UVLO Undervoltage lockout 32 34 V OVP Output Overvoltage Protection 5.6 7.9 V S Switching frequency 300 350 kHz (5) 250 Sync switching frequency SYNC Over VI range 250 Free-running 180 Synchronization range CI 6 V 25 75 % External input capacitance CISO Isolation capacitance RISO Isolation resistance (6) kHz 0.5 Isolation voltage (5) (5) 3.5 External output capacitance (4) 350 -0.3 VISO (2) (3) (5) low-level input voltage CO (1) 250 215 high-level input voltage clock duty cycle 4 V %VO Line regulation Standby input current 75 1 -40C TA 85C Referenced to VI- A (3) Temperature variation Output enable input (pin 3) W (2) A 48 2 UNIT 10 3 Set-point voltage tolerance MAX Over VI range IO VO TYP 0 47 0 (6) 47 1,500 Primary-Secondary F 1000 F Vdc 1,100 10 V pF M The converter requires a minimum load current for proper operation. However, the converter is not damaged when operated under a no-load condition. See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures. The set-point voltage tolerance is affected by the tolerance and stability of RTRIM. The stated limit is unconditionally met if RTRIM has a tolerance of 1%, with 100 ppm/C temperature stability. The Enable input (pin 3) has an internal pullup resistor. Do not place an external pullup resistor on this input pin. If the enable feature is not used, for a positive enable device this input should be left open circuit and a negative enable device should be permanently connected to VI- (pin 2). A discrete MOSFET or bipolar transistor is recommended for the enable control. The open-circuit voltage is typically less than 5 V. See the Application Information for a more detailed description. A device with the synchronization option has a reduced switching frequency of 215 kHz typical. The synchronization frequency can only be adjusted to a higher frequency, up to 350 kHz maximum. An output capacitor is not required for proper operation. However, additional capacitance at the load will improve the transient response. Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 PTMA401120 ELECTRICAL CHARACTERISTICS TA = 25C, VI = 48 V, VO = 12 V, CI = 0 F, CO = 0 F, and IO = IOmax (Unless otherwise stated) PARAMETER PO Output power PTMA401120 TEST CONDITIONS MIN Output current Over VI range ILIM Current Limit Threshold Shutdown, followed by autorecovery VI Input voltage range Over IO range 0.1 (1) 1 36 %VO Over VI range 10 mV Load regulation Over IO range 3 Total output voltage variation Includes set-point, line, load, -40C TA 85C 3 Trim adjust range Over VI range Efficiency PO = POmax VO Ripple (peak-to-peak) 20-MHz bandwidth Transient Response 0.1 A/s load step, 50% to 100% IOmax Standby input current Undervoltage lockout OVP Output Overvoltage Protection S Switching frequency Sync switching frequency 10.8 13.2 %VO V 85 mVpp Recovery time 400 s VO over/undershoot 250 Input high voltage (VIH) 4.5 Input low voltage (VIL) -0.2 Open 0.8 1 Pin 3 open V mA 8 mA 32 34 V 13.5 17.5 V 300 350 kHz (5) 250 Over VI range 250 Free-running 180 Synchronization range mV (4) 250 215 (5) 350 (5) kHz 3.5 6 low-level input voltage -0.3 0.5 V 25 75 % External input capacitance External output capacitance VISO Isolation voltage CISO Isolation capacitance RISO Isolation resistance (6) (3) high-level input voltage CO (5) mV 5 87% clock duty cycle (4) %VO Line regulation UVLO (2) (3) V (3) 1 Input low current (IIL) (1) 75 -40C TA 85C Referenced to VI- CI A Temperature variation Output enable input (pin 3) SYNC W (2) A 48 2 UNIT 12 1.5 Set-point voltage tolerance MAX Over VI range IO VO TYP 0 47 0 47 (6) 1,500 Primary-Secondary F 220 F Vdc 1,100 10 V pF M The converter requires a minimum load current for proper operation. The converter is not damaged when operated under a no-load condition. See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures. The set-point voltage tolerance is affected by the tolerance and stability of RTRIM. The stated limit is unconditionally met if RTRIM has a tolerance of 1%, with 100 ppm/C temperature stability. The Enable input (pin 3) has an internal pullup resistor. Do not place an external pullup resistor on this input pin. If the enable feature is not used, for a positive enable device this input should be left open circuit and a negative enable device should be permanently connected to VI- (pin 2). A discrete MOSFET or bipolar transistor is recommended for the enable control. The open-circuit voltage is typically less than 5 V. See the Application Information for a more detailed description. A device with the synchronization option has a reduced switching frequency of 215 kHz typical. The synchronization frequency can only be adjusted to a higher frequency, up to 350 kHz maximum. An output capacitor is not required for proper operation. However, additional capacitance at the load will improve the transient response. Submit Documentation Feedback 5 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 TERMINAL FUNCTIONS TERMINAL NAME DESCRIPTION NO. 3 The Enable input is an open-base logic input that is referenced to VI-. Two ON/OFF enable options are available, positve logic and negative logic. Positive logic devices are enabled by applying a logic high voltage (Open) and are disabled by applying a logic low voltage (VI-). Negative logic devices are enabled by applying a logic low voltage (VI-) and are disabled by applying a logic high voltage (Open). See the Application Information section for more detailed information. This pin also has the option of a synchronization input. A module that has the synchronization option does not have ON/OFF enable control. A 5-V logic signal greater than the free-running frequency but 350 kHz is required for synchronization control. See the Application Information section for more detailed information. 2 The negative input supply for the module, and the 0-V reference for the Enable/Sync inputs. When powering the module from a positive source, this input is connected to the input source return. 1 The positive input for the module with respect to VI-. When powering the module from a negative input voltage, this input is connected to the input source ground. 4 This is the positive power output with respect to VO-. It is dc isolated from the input power pins. Trim 5 This pin allows the output voltage set point of the module to be increased or decreased up to 10 %. Connecting a resistor between this terminal and VO+ decreases the output voltage set point. Connecting a resistor between this terminal and VO- increases the output voltage set point. A 0.05-W rated resistor may be used, with tolerance and temperature stability of 1% and 100 ppm/C, respectively. If left open circuit, the converter output voltage defaults to its nominal value. The specification table gives the standard resistor values for the most common output voltages. VO- 6 This is the output power return for the VO+ bus. This terminal should be connected to the common of the load circuit. Enable/Sync VI- (1) VI+ (1) VO+ (1) (1) These functions indicate signals electrically common with the input. 3 6 2 1 PTMA40XXXX (Top View) 5 4 6 Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 TYPICAL CHARACTERISTICS PTMA403033 Characteristic Data (VO = 3.3 V) (1) (2) EFFICIENCY vs OUTPUT CURRENT POWER DISSIPATION vs OUTPUT CURRENT 85 3.0 VIN = 48 V VIN = 36 V Efficiency - % 75 VIN = 60 V 70 65 VIN = 75 V 60 VIN = 36 V 2.5 PD - Power Dissipation -W 80 2.0 1.5 VIN = 75 V 1.0 VIN = 48 V 0.5 VIN = 60 V 55 0 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 IO - Output Current - A IO - Output Current - A Figure 1. Figure 2. OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 60 90 80 50 VIN = 48 V 40 30 VIN = 60 V 20 VIN = 75 V 10 TA - Ambient Temperature - C VO - Output Voltage Ripple - VPP mV VIN = 36 V 200 LFM 70 60 50 40 30 0 20 0 0.5 1.0 1.5 2.0 IO - Output Current - A 2.5 0 (2) 0.5 1.0 1.5 2.0 2.5 3.0 IO - Output Current - A Figure 3. (1) Natural Convection Figure 4. All data listed in Figure 1, Figure 2, and Figure 3 have been developed from actual products tested at 25C. This data is considered typical data for the dc-dc converter. The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum rated operating temperature. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2 oz. copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to Figure 4. Submit Documentation Feedback 7 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 TYPICAL CHARACTERISTICS (continued) PTMA402050 Characteristic Data (VO = 5 V) (3) (4) EFFICIENCY vs OUTPUT CURRENT POWER DISSIPATION vs OUTPUT CURRENT 2.0 85 VIN = 48 V PD - Power Dissipation -W VIN = 36 V 80 Efficiency - % 75 VIN = 60 V 70 65 1.6 VIN = 75 V 1.2 VIN = 60 V VIN = 75 V 60 VIN = 48 V 0.4 55 0 0.5 1.0 1.5 2.0 2.5 0 3.0 0.5 IO - Output Current - A Figure 6. OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 80 VIN = 48 V VIN = 36 V 40 30 VIN = 60 V 20 VIN = 75 V 10 TA - Ambient Temperature - C VO - Output Voltage Ripple - VPP mV 50 Natural Convection 70 60 50 40 30 20 0 0.5 1.0 1.5 2.0 0 IO - Output Current - A Figure 7. 8 2.0 90 0 (4) 1.0 1.5 IO - Output Current - A Figure 5. 60 (3) VIN = 36 V 0.8 0.5 1.0 1.5 IO - Output Current - A 2.0 Figure 8. All data listed in Figure 5, Figure 7, and Figure 6 have been developed from actual products tested at 25C. This data is considered typical data for the dc-dc converter. The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum rated operating temperature. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2 oz. copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to Figure 8. Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 TYPICAL CHARACTERISTICS (continued) PTMA401120 Characteristic Data (VO = 12 V) (5) (6) EFFICIENCY vs OUTPUT CURRENT POWER DISSIPATION vs OUTPUT CURRENT 90 2 VIN = 36 V 85 VIN = 48 V VIN = 60 V 1.6 PD - Power Dissipation - W - Efficiency - % VIN = 60 V 80 VIN = 75 V 75 70 VIN = 75 V 1.2 VIN = 48 V 0.8 65 VIN = 36 V 60 0 0.2 0.4 0.6 0.8 0.4 0 1 0.2 Figure 9. Figure 10. OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 0.8 1 0.8 1 90 70 80 VIN = 60 V VIN = 48 V 60 Ambient Temperature - oC VO - Output Voltage Ripple - VPP (mW) 80 VIN = 36 V 50 40 VIN = 75 V 30 20 Natural Convection 70 60 50 40 30 20 10 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 IO - Output Current - A IO - Output Current - A Figure 11. (6) 0.6 IO - Output Current - A IO - Output Current - A (5) 0.4 Figure 12. All data listed in Figure 9, Figure 10, and Figure 11 have been developed from actual products tested at 25C. This data is considered typical data for the dc-dc converter. The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum rated operating temperature. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2 oz. copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to Figure 12. Submit Documentation Feedback 9 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 APPLICATION INFORMATION Operating Features and System Considerations for the PTMA40XX DC/DC Converters Primary-Secondary Isolation These converters incorporate electrical isolation between the input terminals (primary) and the output terminals (secondary). All converters are tested to a withstand voltage of 1500 Vdc. This complies with UL/cUL 60950 and EN 60950 and the requirements for functional isolation. It allows the converter to be configured for either a positive or negative input voltage source. The data sheet Terminal Functions table provides guidance as to the correct reference that must be used for the external control signals. Undervoltage Lockout The undervoltage lockout (UVLO) is designed to prevent the operation of the converter until the input voltage is close to the minimum operating voltage. The converter is held off when the input voltage is below the UVLO threshold, and turns on when the input voltage rises above the threshold. This prevents high start-up current during normal power up of the converter, and minimizes the current drain from the input source during low input voltage conditions. The converter meets full specifications when the minimum specified input voltage is reached. The UVLO circuitry also overrides the operation of the enable or synchronization controls. Only when the input voltage is above the UVLO threshold does this input become functional. Output Overvoltage Clamp The module is protected from an overvoltage on the output using an internal clamp. This protects against a break in the feedback path as well as a ground fault on the external Trim resistor, which would cause the output voltage to increase. Overcurrent Protection To protect against load faults, these converters incorporate output overcurrent protection. Applying a load to the output that exceeds the converter overcurrent threshold (see applicable specification) causes the output voltage to momentarily fold back, and then shut down. Following shutdown, the module periodically attempts to automatically recover by initiating a soft-start power up. This is often described as a hiccup mode of operation, whereby the module continues in the cycle of successive shutdown and power up until the load fault is removed. Once the fault is removed, the converter automatically recovers and returns to normal operation. Soft-Start Power Up When the converter is first powered, the internal soft-start circuit limits how fast the output voltage can rise. The soft-start circuit functions after a valid input source is applied and the output is enabled, after the converter output is enabled using the Enable input, or on a recovery from a load fault. The purpose of the soft-start feature is to limit the surge of current drawn from the input source when the converter begins to operate. By limiting the rate at which the output voltage rises, the magnitude of current required to charge up the load circuit capacitance is significantly reduced. Figure 13 shows the power-up characteristic of a PTMA403033 converter. The output voltage is 3.3 V. The soft-start circuit causes a slow, soft rise of the output voltage. The output voltage will begin to rise after a time delay (typically 85 ms-100 ms) once a valid input voltage is applied. The output then progressively rises to the voltage set-point. The waveforms were recorded with a resistive load of 3 A. 10 Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 APPLICATION INFORMATION (continued) VIN (10 V/div) VOUT (1 V/div) IIN (100 mA/div) t - Time - 20 ms/div Figure 13. Power-up Waveforms Output Voltage Trim Adjustment An external resistor is required to increase or decrease the output voltage set point of the module by 10 %. The resistor, RTRIM, must be connected between the TRIM pin (pin 5) and VO+ (pin 4) to decrease the output voltage, or between the TRIM pin and VO- (pin 6) to increase the output voltage. A 0.05-W rated resistor can be used. The tolerance should be 1%, with a temperature stability of 100 ppm/C (or better). Place the resistor close to the converter and connect it using dedicated PCB traces (see Figure 14). Table 1 gives the nearest standard value of external resistor for the common voltages within each model's adjust range. Table 1. Standard Values of RTRIM for Common Output Voltages PTMA403033 VO (required) PTMA402050 RTRIM (k) down up 3.0 V 118 -- 3.1 V 187 -- 3.2 V 392 3.3 V VO (required) PTMA401120 RTRIM (k) down up 4.5 V 18.7 -- 4.6 V 24.9 -- -- 4.7 V 35.7 open open 4.8 V 57.6 3.4 V -- 249 4.9 V 3.5 V -- 124 5.0 V 3.6 V -- 82.5 5.1 V -- -- -- -- -- -- -- -- -- -- -- VO (required) RTRIM (k) down up 10.8 V 64.9 -- 11.0 V 80.6 -- -- 11.2 V 105 -- -- 11.4 V 143 -- 121 -- 11.6 V 221 -- open open 11.8 V 464 -- -- 124 12.0 V open open 5.2 V -- 61.9 12.2 V -- 118 5.3 V -- 40.2 12.4 V -- 57.6 -- 5.4 V -- 29.4 12.6 V -- 36.5 -- -- 5.5 V -- 23.2 12.8 V -- 26.1 -- -- -- -- -- 13.0 V -- 19.6 -- -- -- -- -- 13.2 V -- 15.8 Submit Documentation Feedback 11 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 For other output voltages, the value of the required trim resistor may be calculated using Equation 1 to adjust the voltage up or Equation 2 to adjust the voltage down. RO V R R TRIM(up) + * RP (kW) VO * VSET (1) RO VO * VR R TRIM(dwn) + * R P (kW) VSET * VO (2) Table 2 gives the required RTRIM equation constants for the converter model selected. To calculate the required value of RTRIM, simply locate the applicable constants and substitute these into the formula along with the desired output voltage. Table 2. Trim Adjust Equation Constants Constants PTMA403033 PTMA402050 PTMA401120 VR (V) 1.24 2.50 2.50 RO () 20 5.11 10 5.11 RP () 1.0 2.05 VSET (V) 3.3 5.0 12.0 VO(V) Desired Output Voltage Desired Output Voltage Desired Output Voltage VO + VO + 4 TRIM 5 RTRIM VO + VO + 4 TRIM 5 CO CO RTRIM VO - 6 VO - 6 VO - VO - (a) TRIM DOWN (b) TRIM UP Figure 14. Output Voltage Adjustment Thermal Considerations Airflow may be necessary to ensure that the module can supply the desired load current in environments with elevated ambient temperatures. The required airflow rate is determined from the safe operating area (SOA). The SOA is the area beneath the applicable airflow rate curve on the graph of temperature derating vs output current. (See the Typical Characteristics.) Operating the converter within the SOA limits ensures that all the internal components are at or below their stated maximum operating temperatures. On/Off Enable Controls On/Off enable options include positive logic or negative logic. A positive logic device enables the module's output when a logic high voltage is present on the Enable pin (pin 3) and disables the output with a logic low voltage. A negative logic device disables the output when a logic high voltage is present on the Enable pin and enables the output during a logic low voltage. See the Electrical Characteristics table for logic high and logic low limits. The Enable pin is ideally controlled with an open-collector (or open-drain) discrete transistor. See Figure 15 below for a typical On/Off Enable control circuit. For automatic start-up, the Enable pin should be left open for a positive logic module and should be shorted to VI- (pin 2) for a negative logic module. Both inputs are electrically referenced to VI- on the primary (input) side of the converter. Do not place an external pull-up resistor on this input pin. 12 Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 Enable Control Schematic VI + 1 VI + 3 ENABLE/SYNC On/Off Control 2 VI - VI - Figure 15. Typical On/Off Enable Control Circuit On/Off Enable Turn-On Time Once enabled, the converter executes a soft-start power up. The converter exibits a short delay of approximately 100 s, measured from the transition of the enable signal to the instance the VO Bus output begins to rise. The output is in regulation within 1.5 ms. VOUT (1 V/div) IIN (100 mA/div) VENABLE (5 V/div) t - Time - 1 ms/div Figure 16. Output Enable Power-Up Characteristic Submit Documentation Feedback 13 PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 Synchronization The Synchronization option allows multiple power modules to be synchronized to a common frequency. Driving the Sync pin (pin 3) with an external clock set to the desired frequency, synchronizes all connected modules to that frequency. Modules with the synchronization option have a reduced free-running switching frequency of 215 kHz typical. The synchronization frequency can only be adjusted to a higher frequency, up to 350 kHz. A 5-V logic signal is recommended for control. See Figure 17. See the Electrical Characteristics table for synchronization limits. VI + 1 VI + 2 VI - VI - 3 ENABLE/SYNC Sync Control Figure 17. Synchronization Control MECHANICALS Tape and Reel TOLERANCES UNLESS OTHERWISE SPECIFIED .XX = 0.005 HOLES = 0.001 .XXX = 0.003 ANGLES = 1/2" (c) This Document and the information contained herein is confidential and proprietary to Texas Instrumants, and may not be reproduced or used for any purpose without the expressed written permission of Texas Instruments. 14 Submit Documentation Feedback PTMA403033 PTMA402050 PTMA401120 www.ti.com SLTS259B - FEBRUARY 2006 - REVISED MAY 2007 MECHANICALS (continued) Tray (c) This Document and the information contained herein is confidential and proprietary to Texas Instrumants, and may not be reproduced or used for any purpose without the expressed written permission of Texas Instruments. Submit Documentation Feedback 15 PACKAGE OPTION ADDENDUM www.ti.com 23-Jun-2012 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) (Requires Login) PTMA401120A1AD ACTIVE ThroughHole Module EEP 4 30 Pb-Free (RoHS) SN PTMA401120A1AS ACTIVE Surface Mount Module EET 4 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120A1AST ACTIVE Surface Mount Module EET 4 250 TBD Call TI Call TI PTMA401120A1AZ ACTIVE Surface Mount Module BET 4 30 Pb-Free (RoHS) SNAGCU PTMA401120A1AZT ACTIVE Surface Mount Module BET 4 250 TBD Call TI PTMA401120A2AD ACTIVE ThroughHole Module EEV 5 30 Pb-Free (RoHS) SN PTMA401120A2AS ACTIVE Surface Mount Module EEW 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120A2AST ACTIVE Surface Mount Module EEW 5 250 TBD Call TI Call TI PTMA401120A2AZ ACTIVE Surface Mount Module BEW 5 30 Pb-Free (RoHS) SNAGCU PTMA401120A2AZT ACTIVE Surface Mount Module BEW 5 250 TBD Call TI PTMA401120A3AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA401120A3AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120A3AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA401120A3AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA401120A3AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA401120N1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA401120N1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Addendum-Page 1 Samples N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-1-235C-UNLIM/ Level-3-260C-168HRS PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 23-Jun-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) PTMA401120N1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI PTMA401120N1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU PTMA401120N1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA401120N2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA401120N2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120N2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA401120N2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA401120N2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA401120P1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA401120P1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120P1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI Call TI PTMA401120P1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU PTMA401120P1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA401120P2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA401120P2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA401120P2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA401120P2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA401120P2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI Addendum-Page 2 Samples (Requires Login) Call TI Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 23-Jun-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) PTMA402050A1AD ACTIVE ThroughHole Module EEP 4 30 Pb-Free (RoHS) SN PTMA402050A1AS ACTIVE Surface Mount Module EET 4 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050A1AST ACTIVE Surface Mount Module EET 4 250 TBD Call TI Call TI PTMA402050A1AZ ACTIVE Surface Mount Module BET 4 30 Pb-Free (RoHS) SNAGCU PTMA402050A1AZT ACTIVE Surface Mount Module BET 4 250 TBD Call TI PTMA402050A2AD ACTIVE ThroughHole Module EEV 5 30 Pb-Free (RoHS) SN PTMA402050A2AS ACTIVE Surface Mount Module EEW 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050A2AST ACTIVE Surface Mount Module EEW 5 250 TBD Call TI Call TI PTMA402050A2AZ ACTIVE Surface Mount Module BEW 5 30 Pb-Free (RoHS) SNAGCU PTMA402050A2AZT ACTIVE Surface Mount Module BEW 5 250 TBD Call TI PTMA402050A3AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA402050A3AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050A3AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA402050A3AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA402050A3AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA402050N1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA402050N1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050N1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI Call TI Addendum-Page 3 Samples (Requires Login) N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 23-Jun-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) PTMA402050N1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU PTMA402050N1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA402050N2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA402050N2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050N2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA402050N2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA402050N2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA402050P1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA402050P1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050P1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI Call TI PTMA402050P1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU PTMA402050P1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA402050P2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA402050P2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA402050P2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA402050P2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA402050P2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA403033A1AD ACTIVE ThroughHole Module EEP 4 30 Pb-Free (RoHS) SN Addendum-Page 4 Samples (Requires Login) Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 23-Jun-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) PTMA403033A1AS ACTIVE Surface Mount Module EET 4 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033A1AST ACTIVE Surface Mount Module EET 4 250 TBD Call TI Call TI PTMA403033A1AZ ACTIVE Surface Mount Module BET 4 30 Pb-Free (RoHS) SNAGCU PTMA403033A1AZT ACTIVE Surface Mount Module BET 4 200 TBD Call TI PTMA403033A2AD ACTIVE ThroughHole Module EEV 5 30 Pb-Free (RoHS) SN PTMA403033A2AS ACTIVE Surface Mount Module EEW 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033A2AST ACTIVE Surface Mount Module EEW 5 250 TBD Call TI Call TI PTMA403033A2AZ ACTIVE Surface Mount Module BEW 5 30 Pb-Free (RoHS) SNAGCU PTMA403033A2AZT ACTIVE Surface Mount Module BEW 5 250 TBD Call TI PTMA403033A3AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA403033A3AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033A3AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA403033A3AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA403033A3AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA403033N1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA403033N1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033N1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI Call TI PTMA403033N1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU Addendum-Page 5 Samples (Requires Login) Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 23-Jun-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) PTMA403033N1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA403033N2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA403033N2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033N2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA403033N2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA403033N2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI PTMA403033P1AD ACTIVE ThroughHole Module EEP 5 30 Pb-Free (RoHS) SN PTMA403033P1AS ACTIVE Surface Mount Module EET 5 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033P1AST ACTIVE Surface Mount Module EET 5 250 TBD Call TI Call TI PTMA403033P1AZ ACTIVE Surface Mount Module BET 5 30 Pb-Free (RoHS) SNAGCU PTMA403033P1AZT ACTIVE Surface Mount Module BET 5 250 TBD Call TI PTMA403033P2AD ACTIVE ThroughHole Module EEP 6 30 Pb-Free (RoHS) SN PTMA403033P2AS ACTIVE Surface Mount Module EET 6 30 TBD SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS PTMA403033P2AST ACTIVE Surface Mount Module EET 6 250 TBD Call TI Call TI PTMA403033P2AZ ACTIVE Surface Mount Module BET 6 30 Pb-Free (RoHS) SNAGCU PTMA403033P2AZT ACTIVE Surface Mount Module BET 6 250 TBD Call TI (1) Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI N / A for Pkg Type Level-3-260C-168 HR Call TI The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. Addendum-Page 6 Samples (Requires Login) PACKAGE OPTION ADDENDUM www.ti.com 23-Jun-2012 PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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