PKF 4000A I 6.6-10 W DC/DC Power Modules 48 V Input Series * SMD and through-hole versions with ultra low component height 8.0 mm (0.315 in.) * 83% efficiency (typ at 5V) * 1,500 V dc isolation voltage * Switching frequency syncronization * MTBF >4.9 million hours at +55C case temperature (+40C ambient) * Low EMI measured according to CISPR 22 and FCC part 15J Patents US: D357901 DE: M94022763 The MacroDensTM 10W PKF 4000A I series true component level on-board DC/DC power modules are intended as distributed power sources in decentralized - 48 and - 60V DC power systems. Utilization of thick film technology and a high degree of silicon integra-tion has made it possible to achieve a MTBF of more than 4.9 million hours. The high reliability and the very low height of these DC/DC power modules makes them particularly suited for Information Technology and Telecom (IT&T) applications, with board spacing down to 15 mm or 0.6 in. The over-moulded rugged design also makes them suitable for other demanding industrial applications. They are optimized for free convection cooling and E have an operational ambient temperature range in compliance with present and future application needs, including non temperature controlled environments. The mechanical design offers the choice of surface mount or through-hole versions, delivered in readyto-use tubes, trays or tape & reel package, and compati-bility with semi and fully aqueous cleaning processes. The PKF series is manufactured using highly automated manufacturing lines with a world-class quality commitment and a five-year warranty. Ericsson Microelectronics AB has been an ISO 9001 certified supplier since 1991. For a complete product program please reference the back cover. General Absolute Maximum Ratings Characteristics min max Unit TC Case temperature at full output power -45 +100 C TS Storage temperature -55 +125 C VI Continuous input voltage1) -0.5 +75 V dc VISO Isolation voltage (input to output test voltage) 1,500 Vtr Transient input energy VRC Remote control voltage pin 10, 11 ref. to pin 17 Vadj Output adjust voltage pin 8, 9 ref. to pin 17 Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an unspecified manner. V dc 0.01 Ws -5 +16 V dc -5 +40 V dc Input TC < TCmax unless otherwise specified Characteristics Conditions min VI Input voltage range1)2) VIoff Turn-off input voltage See typical characteristics VIon Turn-on input voltage See typical characteristics CI Input capacitance PIi Input idling power IO = 0, TC = -30...+ 95 C (VI = 53V) (VI = 66V) PRC Input stand-by power TC = -30...+ 95 C, RC connected to pin 17 (VI = 53V) (VI = 66V) typ max Unit 72 V 34.5 36.0 V 36 38.0 V 38 30.0 NOTES: 1) The input mF 1.4 310 310 30 45 mW mW 2) 3) voltage range 38...72 V dc meets the European Telecom Standard prETS 300 132-2 Nominal input voltage range in 48 V and 60 V dc power systems, - 40.5... -57.0 V and -50.0... - 72.0 V respectively. At input voltages exceeding 72 V (abnormal voltage) the power loss will be higher than at normal input voltage and TC must be limited to max +95 C. Absolute max continuous input voltage is 75 V dc. Output characteristics will be marginally affected at input voltages exceeding 72 V. The power modules will operate down to 36 V, when VI decreases, but will turn on at VI 38 V, when VI increases (see also Operating information). The test is applicable for through-hole versions. Environmental Characteristics Characteristics Test procedure & conditions Vibration (Sinusoidal) JESD 22-B103 Frequency Amplitude Acceleration Number of cycles 10...500 Hz 0.75 mm 10 g 10 in each axis MIL-STD-883 Method 2026 Frequency Acceleration density spectrum Duration Reproducability 10...500 Hz Random vibration Shock (Half sinus) Temperature change Accelerated damp heat Solder resistability3) Aggressive environment 2 (IEC 68-2-6 Fc) (IEC 68-2-34 Ed) JESD 22-B104 (IEC 68-2-27 Ea) JESD 22-A104 (IEC 68-2-14 Na) JESD 22-A101 (IEC 68-2-3 Ca with bias) JESD 22-B106 (IEC 68-2-20 Tb 1A) IEC 68-2-11 Ka Peak acceleration Shock duration 0.5 g2/Hz 10 min in 3 directions medium (IEC 62-2-36) 200 g 3 ms Temperature Number of cycles -40C...+125C 500 Temperature Humidity Duration 85C 85% RH 1000 hours Temperature, solder Duration 260C 10...13 s Duration Temperature Concentration 96 h 35C 5% EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Mechanical Data Through-hole version Foot print Component side 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 5.0 [0.197] 40.0 [1.575] 8 9 24.0 [0.945] 29.6 [1.165] Foot print Component side 2.8 [0.110] Surface-mount version 3.6 [0.142] 40.0 [1.575] Dimensions in mm (in) Connections Dimensions in mm (in) Weight Maximum 20 g (0.71 oz). Pin Designation Function 1 Out 1 Output 1. Positive voltage ref. to Rtn. 2 Rtn Output return. 3-6 NC Not connected. 7 Sync Synchronization input. 8 Vadj Output voltage adjust. To set typical output voltage (VO i) connect pin 8 to pin 9. 9 NOR Connection of Nominal Output voltage Resistor. (See Operating Information, Output Voltage Adjust). 10 TOA Turn-on/off input voltage adjust (VI on/VI off). Used to decrease the turn-on/off input voltage threshold. 11 RC Remote control and turn-on/off input voltage adjust. Used to turn-on and turn-off output and to set the turn-on/off input voltage threshold. 12-16 NC Not connected. 17 - In Negative input. 18 + In Positive input. EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Case The case consists of semiconductor grade epoxy with embedded pins. Coefficient of thermal expansion (CTE) is typ. 15 ppm/C. Connection Pins Base material is copper (Cu), first plating is nickel (Ni) and second (outer) plating is palladium (Pd). 3 Thermal Data Reflow Soldering Information Two-parameter model The PKF series of DC/DC power modules are manufactured in surface mount technology. Extra precautions must therefore be taken when reflow soldering the surface mount version. Neglecting the soldering information given below may result in permanent damage or significant degradation of power module performance. The PKF series can be reflow soldered using IR, Natural Convection, Forced Convection or Combined IR/Convection Technologies. The high thermal mass of the component and its effect on DT (C) requires that particular attention be paid to other temperature sensitive components. IR Reflow technology may require the overall profile time to be extended to approximately 8-10 minutes to ensure an acceptable DT. Higher activity flux may be more suitable to overcome the increase in oxidation and to avoid flux burn-up. The general profile parameters detailed in the diagram, with this extended time to reach peak temperatures, would then be suitable. Note! These are maximum parameters. Depending on process variations, an appropriate margin must be added. This model provides a more precise description of the thermal characteristics to be used for thermal calculations. Thermally the power module can be considered as a component and the case temperature can be used to characterize the properties. The thermal data for a power module with the substrate in contact with the case can be described with two thermal resistances. One from case to ambient air and one from case to PB (Printed circuit Board). The thermal characteristics temperature can be calculated from the following formula: TPB = (TC-TA)x(Rth C-PB+Rth C-A)/Rth C-A-PdxRth C-PB+TA Where: Pd: TC: TA: dissipated power, calculated as PO x(l/h-1) max average case temperature ambient air temperature at the lower side of the power module temperature in the PB between the PKF connection pins TPB: Rth C-PB: thermal resistance from case to PB under the power module Rth C-A: thermal resistance from case to ambient air v: velocity of ambient air Rth C-PB is constant and Rth C-A is dependent on the air velocity. Free convection is equal to an air velocity of approx. 0.2 - 0.3 m/s. See figure below. Palladium plating is used on the terminal pins. A pin temperature (Tp) in excess of the solder fusing temperature (+183C for Sn/Pb 63/37) for more than 25 seconds and a peak temperature above 195C, is required to guarantee a reliable solder joint. Both pin 1 and pin 9 must be monitored. No responsibility is assumed if these recommendations are not strictly followed. 4 EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Safety Electrical Data The PKF 4000A I series DC/DC power modules are designed in accordance with EN 60 950, Safety of information technology equipment including electrical business equipment. SEMKO certificate no. 9814213. Fundamental circuit diagram Single output The PKF power modules are recognized by UL and meet the applicable requirements in UL 1950 Safety of information technology equipment, the applicable Canadian safety requirements and UL 1012 Standard for power supplies. The DC/DC power module shall be installed in an end-use equipment and considerations should be given to measuring the case temperature to comply with TC max when in operation. Abnormal component tests are conducted with the input protected by an external 15 A fuse. The need for repeating these tests in the end-use appliance shall be considered if installed in a circuit having higher rated devices. When the supply to the DC/DC power module meets all the requirements for SELV (<60 V dc), the output is considered to remain within SELV limits (level 3). The isolation is an operational insulation in accordance with EN 60 950. The DC/DC power module is intended to be supplied by isolated secondary circuitry and shall be installed in compliance with the requirements of the ultimate application. If they are connected to a 60 V DC system reinforced insulation must be provided in the power supply that isolates the input from the mains. Single fault testing in the power supply must be performed in combination with the DC/DC power module to demonstrate that the output meets the requirement for SELV. One pole of the input and one pole of the output is to be grounded or both are to be kept floating. Transient input voltage The terminal pins are only intended for connection to mating connectors of internal wiring inside the end-use equipment. These DC/DC power modules may be used in telephone equipment in accordance with paragraph 34 A.1 of UL 1459 (Standard for Telephone Equipment, second edition). The galvanic isolation is verified in an electric strength test. Test voltage (VISO) between input and output is 1,500 V dc for 60 s. In production the test duration may be decreased to 1 s. The capacitor between input and output has a value of 1 nF and the leakage current is less than 1A @ 53 V dc. Single voltage pulse at +25 C ambient temperature. The case is designed in non-conductive epoxy. Its flammability rating meets UL 94V-0. The oxygen index is 34%. EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 5 PKF 4610A TC = -30...+95C, VI = 38 ...72V and pin 8 connected to pin 9. Output Output 1 Characteristics VOi Conditions Output voltage initial setting and accuracy Unit Output voltage tolerance band IO = 0.2...2.0 A Long term drift included Idling voltage IO = 0 A Line regulation IO = 2 A Load regulation typ 3.27 3.30 3.33 V 1.7 3.8 V TC = 0...+95C 3.17 3.42 V TC = -30C 2.90 3.42 V 4.15 V 3.80 VI = 38...60 V 20 VI = 50...72 V 10 IO = 0.2...2.0 A, VI = 53 V 50 IO = 0.2...2.0 A, VI = 53V load step = 1 A Vtr mV 150 Load transient recovery time ttr max TC = +25C, IO = 1.5 A, VI = 53 V Output adjust range1) VO min mV 150 ms +200 mV -200 mV -0.6 mV/C Load transient voltage coefficient2) IO = 2 A, TC =+40...+90C Tcoeff Temperature tr Ramp-up time IO = 2 A, 0.1...0.9 xVO, VI = 53 V 2 ms ts Start-up time IO = 0.2...2.0 A, VI = 53 V From VI connection to VO = 0.9 xVOi 5 ms IO Output current POmax Max output power2) Calculated value 6.6 Ilim Current limiting threshold TC<TCmax, VO = 3.0 V 2.35 Isc Short circuit current VO = 0.2...0.5V, TC=+25C VOac Output ripple & noise IO = 2 A 0 2.0 W 2.80 3.0 20 20 Hz...5 MHz 0.6 ...50 MHz SVR 1) 2) Supply voltage rejection (ac) A f = 100 Hz sine wave, 1Vp-p, VI = 53 V (SVR = 20 log (1 Vp-p/VOp-p)) A A 70 mVp-p 80 dBmV 50 dB See also Operating Information. See Typical Characteristics. Miscellaneous Characteristics h Conditions min typ VI = 53 V 75 78 VI = 66 V 75 78 max Unit % Efficiency IO = 2 A Pd 6 VI = 53 V 2.2 VI = 66 V 2.2 W Power dissipation EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 PKF 4910A TC = -30...+95C, VI = 38 ...72V and pin 8 connected to pin 9. Output Output 1 Characteristics VOi Conditions Output voltage initial setting and accuracy Unit Output voltage tolerance band Long term drift included Idling voltage IO = 0 A Line regulation IO = 3 A Load regulation typ 3.27 3.30 3.33 V 1.75 4.08 V IO = 0.3...2.5 A 3.17 3.43 V IO = 0.3...3.0 A 3.13 3.43 V 4.0 V 3.7 VI = 38...60 V 45 VI = 50...72 V 10 mV IO = 0.3...3.0 A, VI = 53 V 30 Load transient recovery time ttr IO = 0.3...3.0 A, VI = 53 V load step = 1.5 A Vtr max TC = +25C, IO = 2.0 A, VI = 53 V Output adjust range1) VO min 170 mV 130 ms +300 mV -300 mV -1.5 mV/C Load transient voltage coefficient2) IO = 3 A, TC =+40...+90 C Tcoeff Temperature tr Ramp-up time IO = 3 A, 0.1...0.9 xVO, VI = 53 V 3 ms ts Start-up time IO = 0.3...3.0 A, VI = 53 V From VI connection to VO = 0.9 xVOi 6 ms IO Output current POmax Max output power2) Calculated value 9.9 Ilim Current limiting threshold TC<TCmax, VO = 3.0 V 3.2 Isc Short circuit current VO = 0.2...0.5V, TC=+25C VOac Output ripple & noise IO = 3 A 0 3.0 W 3.4 20 0.6 ...50 MHz SVR 1) 2) Supply voltage rejection (ac) 3.7 4.1 20 Hz...5 MHz f = 100 Hz sine wave, 1Vp-p, VI = 53 V (SVR = 20 log (1 Vp-p/VOp-p)) A A A 50 mVp-p 80 dBmV 60 dB See also Operating Information. See Typical Characteristics. Miscellaneous Characteristics h Conditions min typ VI = 53 V 75 78 VI = 66 V 75 78 max Efficiency Unit % IO = 3 A Pd VI = 53 V 3.3 VI = 66 V 3.3 Power dissipation EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 W 7 PKF 4111A TC = -30...+95C, VI = 38 ...72V and pin 8 connected to pin 9. Output Output 1 Characteristics VOi Conditions Unit Output voltage initial setting and accuracy min typ 5.02 5.05 max 5.08 V 2.62 6.39 V 4.85 5.25 V 6.0 V TC = +25C, IO = 1.5 A, VI = 53 V Output adjust range1) VO Output voltage tolerance band Long term drift included Idling voltage IO = 0 A Line regulation IO = 2 A Load regulation IO = 0.2...2.0 A 5.8 VI = 38...60 V 20 VI = 50...72 V 6 IO = 0.2...2.0 A, VI = 53 V 50 80 Load transient recovery time ttr IO = 0.2...2.0 A, VI = 53 V load step = 1 A Vtr mV 180 mV 200 ms +200 mV -200 mV -1.3 mV/C Load transient voltage coefficient2) IO = 2 A, TC =+40...+90C Tcoeff Temperature tr Ramp-up time IO = 2 A, 0.1...0.9 xVO 2 ms ts Start-up time IO = 0.2...2.0 A , VI = 53 V From VI connection to VO = 0.9 xVOi 5 ms IO Output current power2) 0 Calculated value 2.0 10 POmax Max output Ilim Current limiting threshold TC<TCmax, VO = 4.0 V Isc Short circuit current VO = 0.2...0.5 V, TC =+25C VOac Output ripple & noise IO = 2 A W 2.15 2.60 3.0 20 20 Hz...5 MHz 0.6 ...50 MHz SVR 1) 2) Supply voltage rejection (ac) A f = 100 Hz sine wave, 1Vp-p, VI = 53 V (SVR = 20 log (1 Vp-p/VOp-p)) A A 50 mVp-p 80 dBmV 50 dB See also Operating Information. See Typical Characteristics. Miscellaneous Characteristics h Conditions min typ VI = 53 V 78 83 VI = 66 V 78 81 max Efficiency Unit % IO = 2 A Pd 8 VI = 53 V 2.5 VI = 66 V 2.5 Power dissipation W EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Typical Characteristics PKF 4610A Output characteristic (typ) Power derating Efficiency (typ) @ TA = +25C Temperature coefficient Turn-on/turn-off input voltage Output voltage band Dynamic load response (typ) @ + 25 C The output voltage deviation is determined by the load transient (dI/dt) 200 mV/div 2 A/div Load change: dI/dt 4 A/ms 0.1 ms/div EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 9 PKF 4910A Output characteristic (typ) Power derating Efficiency (typ) @ TA = +25C Temperature coefficient Turn-on/turn-off input voltage Dynamic load response (typ) @ + 25 C The output voltage deviation is determined by the load transient (dI/dt) 200 mV/div 2 A/div Load change: dI/dt 4 A/ms 0.1 ms/div PKF 4111A Output characteristic (typ) Temperature coefficient Power derating Efficiency (typ) @ TA = +25C Turn-on/turn-off input voltage Dynamic load response (typ) @ + 25 C Turn-off The output voltage deviation is determined by the load transient (dI/dt) 200 mV/div Turn-off 2 A/div Load change: dI/dt 4 A/ms 0.1 ms/div 10 EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 EMC Specifications The PKF power module is mounted on a double sided Printed circuit Board (PB) with ground plane during EMC measurements. The fundamental switching frequency is 510 kHz 5% @ IO = (0.1...1.0) x IOmax. Conducted EMI (input teminals) Radiated EMS (Electro-Magnetic Fields) Radiated EMS is measured according to test methods in IEC Standard publ. 801-3. No deviation outside the VO tolerance band will occur under the following conditions: Frequency range Voltage level 0.01...200 MHz 3 Vrms/m 200...1,000 MHz 3 Vrms/m 1...12 GHz 10 Vrms/m ESD Electro Static Discharge is tested according to IEC publ. 801-2. No destruction will occur if the following voltage levels are applied to any of the terminal pins: Test Air discharge Contact discharge Voltage level 4 kV 2 kV EFT Electrical Fast Transients on the input terminals could affect the output voltage regulation causing functional errors on the Printed Board Assembly (PBA). The PKF power modules withstand EFT levels of 0.5 kV keeping VO within the tolerance band and 2.0 kV without destruction. Tested according to IEC publ. 801-4. PKF series typical conducted EMI performance Output Ripple & Noise (VOac) Output ripple is measured as the peak to peak voltage of the fundamental switching frequency. Test set up Operating Information Fuse Considerations External Filter (class B) Required external input filter in order to meet class B in EN 55022, CISPR 22 and FCC part 15J. To prevent excessive current from flowing through the input supply line, in the case of a short-circuit across the converter input, an external fuse should be installed in the non-earthed input supply line. We recommend using a fuse rated at approximately 2 to 4 times the value calculated in the formula below: PO max Iin max = (hmin x VI min) Refer to the fuse manufacturer for further information. Remote Control (RC) Turn-on or turn-off can be realized by using the RC-pin. If pin 11 is connected to pin 17 the power modules turns off. Normal operation is achieved if pin 11 is open (NC). To ensure safe turn-off the voltage difference between pin 11 and 17 shall be less than 1.0 V. RC is an TTL open collector compatible output with a sink capacity >300 mA (see fig. 1). The low ESR is critical for the result. Conducted EMS Electro Magnetic Susceptibility is measured by injection of electrical disturbances on the input terminals. No deviation outside the VO tolerance band will occur under the following conditions: Frequency range Voltage level 0.15...300 MHz 1.0 Vrms The signal is amplitude modulated with 1 kHz/80% and applied in both differential and common mode. EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Figure 1 11 Over Voltage Protection (OVP) Typical required resistor value to increase VO is given by: The remote control can also be utilized for OVP by using the external circuitry in figure 2. Resistor values are for 5 V output applications, but can easily be adjusted for other output voltages and the desired OVP level. Radj = k5 x (k6 - VO)/(VO - VOi) kW where VO is the desired output voltage, VOi is the typical output voltage initial setting and k5=3.18 k5=4.20 k5=4.20 k6=3.87 k6=6.39 k6=4.13 PKF 4610A PKF 4111A*) PKF 4910A Typical required resistor value to decrease VO is given by: Radj = k7 x (VOi - VO)/(VO - k8) kW where k7=17.20 k7=18.0 k7=17.60 k8=1.73 k8=2.62 k8=1.75 PKF 4610A PKF 4111A*) PKF 4910A Figure 2 Turn-on/off Input Voltage The power module monitors the input voltage and will turn on and turn off at predetermined levels set by means of external resistors. To increase VIon a resistor should be connected between pin 11 and 17 (see fig. 3). The resistance is given by the following equation (For VIon>37 V): Figure 4 PKF 4910A: The following typical resistor values can be used to adjust the output voltage to 1.8 V or 2.5 V. RIon = (k1 - VIon)/(VIon - k2) kW where k2 is the typical unadjusted turn-on input voltage (V). VIoff is the adjusted turn-off input voltage and is determined by VIon -VIoff = 2 V (typical value). To decrease VIon a resistor should be connected between pin 10 and 11 (see fig. 3). The resistance is given by the following equation (for 34.5 V < VIon > 36 V: Output voltage tolerance band Rodnom (W) Standard values E24 (W) 2.5 V 4% 19.4 k 33 k//47 k 1% 200 ppm 1.8 V 4% 500 k 1M//1M 1% 200 ppm RIon = k3 x (VIon - k4)/(k2 - VIon) kW k1 2780 k2 36.0 k3 49 k4 32.0 PKF 4610A, PKF 4910A PKF 4111A*) PKF 4610A: The following typical resistor values can be used to adjust the output voltage to 1.8 V or 2.5 V. For more information on temperature dependence see fig. 5. Output voltage tolerance band Rodnom (W) Standard values E24 (W) 2.5 V 4% 17.8 k 20 k//160 k 1% 200 ppm 1.8 V 4% 360 k 360 k 1% 200 ppm Max output current vs case temperature for 4% tolerance band at different output voltages. Figure 3 Output Voltage Adjust (Vadj) Output voltage, VO, can be adjusted by using an external resistor or other external circuitry. If other circuitry is used, the slew rate has to be limited to maximum 5 V/ms. If pins 8 and 9 are not connected together the output will decrease to a low value. To increase VO a resistor should be connected between pin 8/9 and 17, and to decrease VO a resistor should be connected between pin 8 and 9 (see fig. 4). *) This formula is valid for PKF 4111A Rev. 3B and above, for prior revision index, please contact the factory. 12 Figure 5 EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Current Limiting Protection (Ilim) Parallel Operation The output power is limited at loads above the output current limiting threshold (Ilim), specified as a minimum value. Paralleling of several converters is easily accomplished by direct connection of the output voltage terminal pins. The load regulation characteristic is specifically designed for optimum paralleling performance. Load sharing between converters will be within 10%. It is recommended not to exceed PO = n x 0.9 x PO max, where POmax is the maximum converter output power and n the number of paralleled converters, to prevent overloading any of the converters and thereby decreasing the reliability performance. Voltage Margining For voltage controlled margining e.g. at final test, the following setup can be used. By increasing the control voltage V1 to +10 V the output voltage decreases 5% of VOi, and by decreasing V1 to -10 V the output voltage increases 5%. Precision load regulation for the PKF 4000A series PKF 4000A I has a load regulation which allows paralleling of the power modules without external control. If there is a need for tighter voltage regulation, the figure below (fig. 7) shows how to obtain a very exact voltage. The output voltage is divided by two resistors and compared with a reference voltage. Out 1 integrates the voltage difference and the signal is fed back to output adjust by an opto coupler. Please note: Figure 6 The operational amplifier must be a single supply in order to operate at the actual output voltage if there are no other voltages available. The opto coupler should have a current gain of 25-200%. The output voltage is: Uout = Uref x (R2 + R1)/R2 Capacitive Load The PKF series has no maximum limit for capacitive load on the output. The power module may operate in current limiting mode during start-up, affecting the ramp-up and the start-up time. For optimum start performance we recommend maximum 100 mF/A of IO. Connect capacitors at the point of load for best performance. Other output voltages and reference voltages may be used. R1 and R2 is calculated from formula above. Please keep the values in the same range as in table below. Input and Output Impedance Both the source impedance of the power feeding and the load impedance will interact with the impedance of the DC/DC power module. It is most important to have the ratio between L and C as low as possible, i.e. a low characteristic impedance, both at the input and output, as the power modules have a low energy storage capability. Use an electrolytic capacitor across the input if the source inductance is higher than 10 mH. Their equivalent series resistance together with the capacitance acts as a lossless damping filter. Suitable capacitor values are in the range 10-100 mF. Synchronization (Sync) Figure 7 It is possible to synchronize the switching frequency to an external symmetrical clock signal. The input can be driven by an TTL-compatible output and referenced to the input pin 17. Characteristics min High level 2.2 Threshold level*) 1.2 Low level *) 1.7 max unit 6.5 V 2.2 V 0 0.4 V 1.5 mA 520 688 kHz Sink current Sync. frequency typ Table for selecting resistor values depending on desired output voltage. 1.8 V 2.5V 3.3V R1(W) 160 k 200 k 220 k R2(W) 330 k 191 k 130 k R3(W) 21 k 6.8 k 1k Rise time <10ns EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 13 Delivery Package Information Capacity: Stacking pitch: Weight: Min. order quantity: Tubes 15 power modules/tray 10.16 mm Typ. 130 g 150 pcs (one box contains 10 full trays) The PKF-series is delivered in tubes (designated by /A) with a length of 500 mm (19.69 in), see fig. 8. Tape & Reel SMD versions, SI, can be delivered in standard tape & reel package (designated by /C) on request, see fig. 10. For more information, please contact your local Ericsson sales office. Figure 8 Specification Material: Max surface resistance: Color: Capacity: Weight: End stops: Antistatic coated PVC 1011W/ Transparent 10 power modules/tube Typ. 60 g Pins Trays SMD versions, SI, can be delivered in standard JEDEC trays (designated by /B) on request, see fig. 9. For more information, please contact your local Ericsson sales office. Figure 10 Specification Tape material: Tape width: Tape pitch: Max surface resistance: Tape color: Cover tape color: Reel diameter: Reel hub diameter: Reel capacity: Full reel weight: Min. order quantity: Conductive polystyrene (PS) 72 mm 36 mm 105W/ Black Transparent 13" 7" 150 power modules/reel Typ. 3.7 kg 300 pcs (one box contains two reels) Figure 9 Specification Material: Max temperature: Max surface resistance: Color: 14 Polypropylene (PP) 125 C 105W/ Black EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 Quality Reliability Meantime between failure (MTBF) is calculated to >4.9 million hours at full output power and a case temperature of +55C (TA = +40 C), using the Ericsson failure rate data system. The Ericsson failure rate data system is based on field failure rates and is continuously updated. The data corresponds to actual failure rates of components used in Information Technology and Telecom equipment in temperature controlled environments (TA = - 5... +65 C). The data is considered to have a confidence level of 90%. For more information see Design Note 002. Quality Statement The products are designed and manufactured in an industrial environment where quality systems and methods like ISO 9000, 6 s and SPC, are intensively in use to boost the continuous improvements strategy. Infant mortality or early failures in the products are screened out by a burn-in procedure and an ATE-based final test. Conservative design rules, design reviews and product qualifications, plus the high competence of an engaged work force, contribute to the high quality of our products. Warranty Ericsson Microelectronics warrants to the original purchaser or end user that the products conform to this Data Sheet and are free from material and workmanship defects for a period of five (5) years from the date of manufacture, if the product is used within specified conditions and not opened. In case the product is discontinued, claims will be accepted up to three (3) years from the date of the discontinuation. For additional details on this limited warranty please refer to Ericsson Microelectronics AB's "General Terms and Conditions of Sales", or individual contract documents. Limitation of liability Ericsson Microelectronics does not make any other warranties, expressed or implied including any warranty of merchantability or fitness for a particular purpose (including, but not limited to, use in life support applications, where malfunctions of product can cause injury to a person's health or life). Information given in this data sheet is believed to be accurate and reliable. No responsibility is assumed for the consequences of its use nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Ericsson Microelectronics. These products are sold only according to Ericsson Microelectronics' general conditions of sale, unless otherwise confirmed in writing. Specifications subject to change without notice. EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000 15 Product Program VI VO/IO max Output 1 48/60 V (max 75 Vdc) 3.3 V/2 A 3.3 V/3 A 5 V/2 A Ordering No.*) PO max Through-hole 6.6 W 9.9 W 10 W PKF 4610A PI PKF 4910A PI PKF 4111A PI *) Ericsson Microelectronics AB SE-164 81 KISTA, Sweden Phone: +46 8 757 5000 www.ericsson.com/microelectronics For local sales contacts, please refer to our website or call: Int. +46 8 757 4700, Fax: +46 8 757 4776 SMD PKF 4610A SI PKF 4910A SI PKF 4111A SI See also Delivery Package Information The latest and most complete information can be found on our website! Preliminary Data Sheet EN/LZT 146 30 R2A (c) Ericsson Microelectronics AB, October 2000