Product Folder Sample & Buy Support & Community Tools & Software Technical Documents LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 LM5104 High-Voltage Half-Bridge Gate Driver With Adaptive Delay 1 Features 3 Description * The LM5104 High-Voltage Gate Driver is designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck configuration. The floating high-side driver can work with supply voltages up to 100 V. The high-side and low-side gate drivers are controlled from a single input. Each change in state is controlled in an adaptive manner to prevent shoot-through issues. In addition to the adaptive transition timing, an additional delay time can be added, proportional to an external setting resistor. An integrated high-voltage diode is provided to charge high-side gate drive bootstrap capacitor. A robust level shifter operates at high speed while consuming low power and providing clean level transitions from the control logic to the high-side gate driver. Undervoltage lockout is provided on both the low-side and the high-side power rails. This device is available in the standard SOIC and the WSON packages. 1 * * * * * * * Drives Both a High-Side and Low-Side N-Channel MOSFET Adaptive Rising and Falling Edges With Programmable Additional Delay Single Input Control Bootstrap Supply Voltage Range up to 118-V DC Fast Turnoff Propagation Delay (25 ns Typical) Drives 1000-pF Loads With 15-ns Rise and Fall Times Supply Rail Undervoltage Lockout SOIC and WSON-10 4-mm x 4-mm Package 2 Applications * * * * Current Fed Push-Pull Power Converters High Voltage Buck Regulators Active Clamp Forward Power Converters Half-Bridge and Full-Bridge Converters Device Information(1) PART NUMBER LM5104 PACKAGE BODY SIZE (NOM) SOIC (8) 4.90 mm x 3.91 mm WSON (10) 4.00 mm x 4.00 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Block Diagram HV UVLO LEVEL SHIFT HO DRIVER HS IN RT VDD UVLO DRIVER LO VSS 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 4 4 4 4 5 6 6 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Switching Characteristics .......................................... Typical Characteristics .............................................. 7.3 Feature Description................................................... 9 7.4 Device Functional Modes........................................ 10 8 Application and Implementation ........................ 11 8.1 Application Information............................................ 11 8.2 Typical Application ................................................. 11 9 Power Supply Recommendations...................... 14 9.1 Power Dissipation Considerations .......................... 14 10 Layout................................................................... 15 10.1 Layout Guidelines ................................................. 15 10.2 Layout Example .................................................... 16 11 Device and Documentation Support ................. 16 Detailed Description .............................................. 9 11.1 Trademarks ........................................................... 16 11.2 Electrostatic Discharge Caution ............................ 16 11.3 Glossary ................................................................ 16 7.1 Overview ................................................................... 9 7.2 Functional Block Diagram ......................................... 9 12 Mechanical, Packaging, and Orderable Information ........................................................... 16 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision C (March 2013) to Revision D * Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1 Changes from Revision B (March 2013) to Revision C * 2 Page Page Changed layout of National Data Sheet to TI format ........................................................................................................... 11 Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 5 Pin Configuration and Functions D Package 8-Pin SOIC Top View VDD 1 8 LO HB 2 7 VSS HO 3 6 IN HS 4 5 RT SOIC-8 DPR Package 10-Pin WSON Top View VDD 1 10 HB 2 9 VSS HO 3 8 IN HS 4 7 RT NC 5 6 NC LO Pin Functions PIN SOIC WSON 1 1 NAME VDD DESCRIPTION APPLICATION INFORMATION Positive gate drive supply Locally decouple to VSS using ESR/ESL capacitor, located as close to IC as possible. 2 2 HB High-side gate driver bootstrap rail Connect the positive terminal to bootstrap capacitor to the HB pin and connect negative terminal to HS. The Bootstrap capacitor should be placed as close to IC as possible 3 3 HO High-side gate driver output Connect to gate of high-side MOSFET with short low inductance path. 4 4 HS High-side MOSFET source connection Connect to bootstrap capacitor negative terminal and source of high-side MOSFET. 5 7 RT Deadtime programming pin Resistor from RT to ground programs the deadtime between high- and low-side transitions. The resistor should be located close to the IC to minimize noise coupling from adjacent traces. 6 8 IN Control input Logic 1 equals High-side ON and Low-side OFF. Logic 0 equals High-side OFF and Low-side ON. 7 9 VSS Ground return All signals are referenced to this ground. 8 10 LO Low-side gate driver output Connect to the gate of the low-side MOSFET with a short low inductance path. Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 3 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings (1) (2) MIN MAX UNIT VDD to VSS -0.3 18 V VHB to VHS -0.3 18 V IN to VSS -0.3 VDD + 0.3 V LO Output -0.3 VDD + 0.3 V HO Output VHS - 0.3 VHB + 0.3 V VHS to VSS -1 100 V 118 V VHB to VSS RT to VSS -0.3 Junction Temperature Storage temperature range, Tstg (1) (2) -55 5 V 150 C 150 C Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Recommended Operating Conditions under which operation of the device is specified. Recommended Operating Conditions do not imply performance limits. For performance limits and associated test conditions, see Electrical Characteristics. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. 6.2 ESD Ratings V(ESD) (1) Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) Electrostatic discharge VALUE UNIT 2000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions VDD MIN MAX 9 14 V V HS -1 100 HB VHS + 8 VHS + 14 HS Slew Rate Junction Temperature UNIT V < 50 V/ns 125 C -40 6.4 Thermal Information LM5104 THERMAL METRIC (1) D DPR 8 PINS 10 PINS RJA Junction-to-ambient thermal resistance 114.5 37.9 RJC(top) Junction-to-case (top) thermal resistance 61.1 38.1 RJB Junction-to-board thermal resistance 55.6 14.9 JT Junction-to-top characterization parameter 9.7 0.4 JB Junction-to-board characterization parameter 54.9 15.2 RJC(bot) Junction-to-case (bottom) thermal resistance n/a 4.4 (1) 4 UNIT C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 6.5 Electrical Characteristics MIN and MAX limits apply over the full operating junction temperature range. Unless otherwise specified, TJ = +25C, VDD = VHB = 12 V, VSS = VHS = 0 V, RT = 100k. No Load on LO or HO. PARAMETER TEST CONDITIONS MIN (1) TYP MAX (1) UNIT SUPPLY CURRENTS IDD VDD Quiescent Current LI = HI = 0 V 0.4 0.6 mA IDDO VDD Operating Current f = 500 kHz 1.9 3 mA IHB Total HB Quiescent Current LI = HI = 0 V 0.06 0.2 mA IHBO Total HB Operating Current f = 500 kHz 1.3 3 mA IHBS HB to VSS Current, Quiescent VHS = VHB = 100 V 0.05 10 IHBSO HB to VSS Current, Operating f = 500 kHz 0.08 A mA INPUT PINS VIL Low Level Input Voltage Threshold VIH High Level Input Voltage Threshold RI Input Pulldown Resistance 0.8 100 1.8 V 1.8 2.2 V 200 500 k TIME DELAY CONTROLS VRT Nominal Voltage at RT IRT RT Pin Current Limit 2.7 3 3.3 V 0.75 1.5 2.25 mA TD1 Delay Timer, RT = 10 k 58 90 130 ns TD2 Delay Timer, RT = 100 k 140 200 270 ns 6.0 6.9 7.4 V RT = 0 V UNDER VOLTAGE PROTECTION VDDR VDD Rising Threshold VDDH VDD Threshold Hysteresis VHBR HB Rising Threshold VHBH HB Threshold Hysteresis 0.5 5.7 6.6 V 7.1 0.4 V V BOOT STRAP DIODE VDL Low-Current Forward Voltage IVDD-HB = 100 A 0.60 0.9 VDH High-Current Forward Voltage IVDD-HB = 100 mA 0.85 1.1 V V RD Dynamic Resistance IVDD-HB = 100 mA 0.8 1.5 LO GATE DRIVER VOLL Low-Level Output Voltage ILO = 100 mA 0.25 0.4 V VOHL High-Level Output Voltage ILO = -100 mA VOHL = VDD - VLO 0.35 0.55 V IOHL Peak Pullup Current VLO = 0 V 1.6 A IOLL Peak Pulldown Current VLO = 12 V 1.8 A HO GATE DRIVER VOLH Low-Level Output Voltage IHO = 100 mA 0.25 0.4 V VOHH High-Level Output Voltage IHO = -100 mA, VOHH = VHB - VHO 0.35 0.55 V IOHH Peak Pullup Current VHO = 0 V 1.6 A IOLH Peak Pulldown Current VHO = 12 V 1.8 A (1) Min and Max limits are 100% production tested at 25C. Limits over the operating temperature range are specified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 5 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com 6.6 Switching Characteristics MAX limits apply over the full operating junction temperature range. Unless otherwise specified, TJ = +25C, VDD = VHB = 12 V, VSS = VHS = 0 V, No Load on LO or HO . PARAMETER MIN (1) TEST CONDITIONS TYP MAX (1) UNIT tLPHL Lower Turn-Off Propagation Delay (IN Rising to LO Falling) 25 56 tHPHL Upper Turn-Off Propagation Delay (IN Falling to HO Falling) 25 56 tRC, tFC Either Output Rise/Fall Time CL = 1000 pF 15 tR, tF Either Output Rise/Fall Time (3V to 9V) CL = 0.1 F 0.6 s tBS Bootstrap Diode Turn-Off Time IF = 20 mA, IR = 200 mA 50 ns (1) ns Min and Max limits are 100% production tested at 25C. Limits over the operating temperature range are specified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). 6.7 Typical Characteristics 100 2.0 VDD = 12V CL = 4400 pF IDDO RT = 10k 1.9 10 1.7 CURRENT (mA) CURRENT (mA) CL = 1000 pF CL = 2200 pF CL = 470 pF 1 1.5 1.3 1.1 CL = 0 pF IHBO 0.9 0 10 1 100 0.7 -50 -25 1000 0 25 50 75 100 125 150 FREQUENCY (kHz) TEMPERATURE (C) Figure 1. IDD vs Frequency Figure 2. Operating Current vs Temperature 1.20 1.20 IDD, RT = 10k 1.00 IDD, RT = 10k CURRENT (mA) CURRENT (mA) 1.00 0.80 0.60 IDD, RT = 100k 0.40 0.20 0.00 9 0.60 IDD, RT = 100k 0.40 0.20 IHB, RT = 10k, 100k 8 0.80 10 11 12 13 14 15 16 17 18 0.00 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) VDD, VHB (V) Figure 3. Quiescent Current vs Supply Voltage 6 IHB, RT = 10k, 100k Figure 4. Quiescent Current vs Temperature Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 Typical Characteristics (continued) 100000 2.00 HB = 12V, HS = 0V 1.60 CL = 2200 pF 10000 VDD = VHB = 12V, HS = 0V 1.80 CL = 4400 pF CURRENT (A) CURRENT (PA) 1.40 CL = 1000 pF 1000 1.20 SOURCING 1.00 0.80 SINKING 0.60 100 0.40 CL = 0 pF 0.20 CL = 470 pF 10 0.1 0.00 1 10 100 0 1000 2 4 6 8 10 12 HO, LO (V) FREQUENCY (kHz) Figure 6. HO & LO Peak Output Current vs Output Voltage Figure 5. IHB vs Frequency 0.60 1.00E-01 T = 150C 0.55 1.00E-02 VDDH 0.50 HYSTERESIS (V) T = 25C ID (A) 1.00E-03 1.00E-04 0.45 VHBH 0.40 T = -40C 1.00E-05 0.35 1.00E-06 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.30 -50 0.9 -25 0_ 25 50_ 75_100_125_150_ TEMPERATURE (oC) VD (V) Figure 8. Undervoltage Threshold Hysteresis vs Temperature Figure 7. Diode Forward Voltage 0.700 7.30 7.20 0.600 VDD = VHB = 8V 7.00 0.500 VDDR 6.90 VOH (V) THRESHOLD (V) 7.10 6.80 6.70 VHBR 6.60 VDD = VHB = 12V 0.400 0.300 VDD = VHB = 16V 6.50 0.200 6.40 6.30 -50 -25 0 25 50 75 100 125 150 0.100 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) TEMPERATURE (C) Figure 9. Undervoltage Rising Threshold vs Temperature Figure 10. LO and HO Gate Drive--High-Level Output Voltage vs Temperature Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 7 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com Typical Characteristics (continued) 0.400 40.0 38.0 0.350 36.0 VDD = VHB = 8V 34.0 VDD = VHB = 12V DELAY (ns) VOL (V) 0.300 0.250 TLPHL 32.0 30.0 28.0 0.200 26.0 VDD = VHB = 16V THPHL 24.0 0.150 22.0 0.100 -50 -25 0 25 20.0 -50 -25 75 100 125 150 0 25 50 75 100 125 150 TEMPERATURE (C) TEMPERATURE (C) Figure 11. LO and HO Gate Drive--Low-Level Output Voltage vs Temperature Figure 12. Turn Off Propagation Delay vs Temperature 120 220 110 200 TIME (ns) 90 180 LO,HO Turn On Delay (tD) 160 80 ad 70 De tive ffec + t RT) E (t P ,HO LO Time 60 50 40 30 TIME (ns) 100 0 25 LO,HO Effective Dead Time (tP + tRT) 140 120 LO,HO Turn On Delay (tD) 100 80 60 LO,HO Turn Off Delay (tD) 20 -50 -25 8 50 LO,HO Turn Off Delay (tD) 40 50 20 -50 -25 75 100 125 150 0 25 50 75 100 125 150 TEMPERATURE (C) TEMPERATURE (C) Figure 13. Timing vs Temperature RT = 10K Figure 14. Timing vs Temperature RT = 100K Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 7 Detailed Description 7.1 Overview The LM5104 High Voltage gate driver is designed to drive both the high side and the low side N-Channel MOSFETs in a synchronous buck configuration. The floating high-side driver is capable of working with supply voltages up to 100 V. The high side and low side gate drivers are controlled from a single input. Each change in state is controlled in an adaptive manner to prevent shoot-through issues. In addition to the adaptive transition timing, an additional delay time can be added, proportional to an external setting resistor. An integrated high voltage diode is provided to charge high side gate drive bootstrap capacitor. A robust level shifter operates at high speed while consuming low power and providing clean level transitions from the control logic to the high side gate driver. Under-voltage lockout is provided on both the low side and the high side power rails. 7.2 Functional Block Diagram HV LEVEL SHIFT UVLO HO DRIVER HS IN RT VDD UVLO DRIVER LO VSS 7.3 Feature Description 7.3.1 Adaptive Shoot-Through Protection LM5104 is a high voltage, high speed dual output driver designed to drive top and bottom MOSFET's connected in synchronous buck or half-bridge configuration, from one externally provided PWM signal. LM5104 features adaptive delay to prevent shoot-through current through top and bottom MOSFETs during switching transitions. Referring to the timing diagram Figure 16, the rising edge of the PWM input (IN) turns off the bottom MOSFET (LO) after a short propagation delay (tP). An adaptive circuit in the LM5104 monitors the bottom gate voltage (LO) and triggers a programmable delay generator when the LO pin falls below an internally set threshold ( Vdd/2). The gate drive of the upper MOSFET (HO) is disabled until the deadtime expires. The upper gate is enabled after the TIMER delay (tP+TRT), and the upper MOSFET turns-on. The additional delay of the timer prevents lower and upper MOSFETs from conducting simultaneously, thereby preventing shoot-through. Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 9 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com Feature Description (continued) A falling transition on the PWM signal (IN) initiates the turn-off of the upper MOSFET and turn-on of the lower MOSFET. A short propagation delay (tP) is encountered before the upper gate voltage begins to fall. Again, the adaptive shoot-through circuitry and the programmable deadtime TIMER delays the lower gate turn-on time. The upper MOSFET gate voltage is monitored and the deadtime delay generator is triggered when the upper MOSFET gate voltage with respect to ground drops below an internally set threshold ( Vdd/2). The lower gate drive is momentarily disabled by the timer and turns on the lower MOSFET after the deadtime delay expires (tP+TRT). The RT pin is biased at 3V and current limited to 1mA. It is designed to accommodate a resistor between 5K and 100K, resulting in an effective dead-time proportional to RT and ranging from 90ns to 200ns. RT values below 5K will saturate the timer and are not recommended. 7.3.2 Start-up and UVLO Both top and bottom drivers include undervoltage lockout (UVLO) protection circuitry which monitors the supply voltage (VDD) and bootstrap capacitor voltage (VHB - VHS) independently. The UVLO circuit inhibits each driver until sufficient supply voltage is available to turn-on the external MOSFETs, and the built-in hysteresis prevents chattering during supply voltage transitions. When the supply voltage is applied to VDD pin of LM5104, the top and bottom gates are held low until VDD exceeds UVLO threshold, typically about 6.9 V. Any UVLO condition on the bootstrap capacitor will disable only the high-side output (HO). 7.4 Device Functional Modes 10 IN Pin LO Pin L H L H L H Submit Documentation Feedback HO Pin Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI's customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LM5104 is one of the latest generation of high-voltage gate drivers which are designed to drive both the high-side and low-side N-channel MOSFETs in a half-bridge/full bridge configuration or in a synchronous buck circuit. The floating high-side driver can operate with supply voltages up to 100 V. This allows for N-channel MOSFET control in half-bridge, full-bridge, push-pull, two switch forward and active clamp topologies. Table 1. Highlights FEATURE BENEFIT Adaptive Rising and Falling Edges with Programmable Additional Delay Allows optimization of gate drive timings to account for device differences between high-side and low-side positions. Single Input Control Direct drive from lower cost PWM controllers Internal Bootstrap Diode Reduces parts count and PCB real estate 8.2 Typical Application (Optional external fast recovery diode) VIN VCC RGATE HB VDD VDD HO OUT1 IN HS CBOOT PWM CONTROLLER LM5104 OUT2 LO RT GND L C VSS Figure 15. LM5104 Driving MOSFETs Connected in Synchronous Buck Configuration Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 11 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com Typical Application (continued) 8.2.1 Design Requirements PARAMETER VALUE Gate Driver IC LM5104 Mosfet CSD18531Q5A VDD 10 V Qgmax 43 nC Fsw 200 kHz DMax 95% IHBO 10 A VDH 1.1 V VHBR 7.1 V VHBH 0.4 V 8.2.2 Detailed Design Procedure VHB = VDD - VDH - VHBL where * * * CBOOT = VDD = Supply voltage of the gate drive IC VDH = Bootstrap diode forward voltage drop Vgsmin = Minimum gate source threshold voltage (1) QTOTAL DVHB (2) QTOTAL = Qgmax + IHBO DMax FSW (3) The quiescent current of the bootstrap circuit is 10 A which is negligible compared to the Qgs of the MOSFET. 0.95 QTOTAL = 43nC + 10mA 100kHz (4) QTOTAL = 43.01 nC (5) In practice the value for the CBOOT capacitor should be greater than that calculated to allow for situations where the power stage may skip pulse due to load transients. In this circumstance the boot capacitor must maintain the HB pin voltage above the UVLO voltage for the HB circuit. As a general rule the local VDD bypass capacitor should be 10 times greater than the value of CBOOT. VHBL = VHBR - VHBH VHBL = 6.7 V VHB = 10 V - 1.1 V - 6.7 V VHB = 2.2 V CBOOT = (6) (7) (8) (9) 43.01nc 2.2V (10) (11) CBOOT = 19.54 nF The bootstrap and bias capacitors should be ceramic types with X7R dielectric. The voltage rating should be twice that of the maximum VDD to allow for loss of capacitance once the devices have a DC bias voltage across them and to ensure long-term reliability of the devices. An additional delay turn-on delay can be programmed using an external resistor, RT. Figure 17 shows the relationship between the turnon delay time and the resistor value for RT. 12 Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 8.2.3 Application Curves VDD HB IN Adapt Logic DLY Logic Driver Adapt Logic DLY Logic Driver HO HS LO LM5104 VSS RT 50% LM5104 WAVEFORMS IN tp+TRT LO tp 50% tp tp+TRT 50% HO Td Td Figure 16. Application Timing Waveforms 200 VDD = 12V, HB = 12V, CL = 0, HS = 0 DELAY (ns) 175 150 THPLH 125 TLPLH 100 75 10 20 30 40 50 60 70 80 90 100 RT (k:) Figure 17. Turn On Delay vs RT Resistor Value Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 13 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com 9 Power Supply Recommendations 9.1 Power Dissipation Considerations The total IC power dissipation is the sum of the gate driver losses and the bootstrap diode losses. The gate driver losses are related to the switching frequency (f), output load capacitance on LO and HO (CL), and supply voltage (VDD) and can be roughly calculated as: PDGATES = 2 * f * CL * VDD2 (12) There are some additional losses in the gate drivers due to the internal CMOS stages used to buffer the LO and HO outputs. The plot in Figure 18 shows the measured gate driver power dissipation versus frequency and load capacitance. At higher frequencies and load capacitance values, the power dissipation is dominated by the power losses driving the output loads and agrees well with Equation 12. This plot can be used to approximate the power losses due to the gate drivers. 1.000 CL = 4400 pF CL = 2200 pF POWER (W) 0.100 CL = 1000 pF 0.010 CL = 470 pF CL = 0 pF 0.001 0.1 _ 1.0 _ 10.0_ 100.0 1000.0_ SWITCHING FREQUENCY (kHz) Figure 18. Gate Driver Power Dissipation (LO + HO) VCC = 12V, Neglecting Diode Losses The bootstrap diode power loss is the sum of the forward bias power loss that occurs while charging the bootstrap capacitor and the reverse bias power loss that occurs during reverse recovery. Since each of these events happens once per cycle, the diode power loss is proportional to frequency. Larger capacitive loads require more current to recharge the bootstrap capacitor resulting in more losses. Higher input voltages (VIN) to the half bridge result in higher reverse recovery losses. The following plot was generated based on calculations and lab measurements of the diode recovery time and current under several operating conditions. This can be useful for approximating the diode power dissipation. 14 Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 LM5104 www.ti.com SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 Power Dissipation Considerations (continued) 1.000 1.000 CL = 4400 pF 0.100 POWER (W) POWER (W) CL = 4400 pF CL = 0 pF 0.010 0.001 1.0 kHz 0.100 CL = 0 pF 0.010 10.0 kHz 100.0 kHz 1000.0 kHz 0.001 1.0 kHz SWITCHING FREQUENCY (kHz) 10.0 kHz 100.0 kHz 1000.0 kHz SWITCHING FREQUENCY (kHz) Figure 19. Diode Power Dissipation VIN = 80V Figure 20. Diode Power Dissipation VIN = 40V The total IC power dissipation can be estimated from the above plots by summing the gate drive losses with the bootstrap diode losses for the intended application. Because the diode losses can be significant, an external diode placed in parallel with the internal bootstrap diode (refer to Figure 15) can be helpful in removing power from the IC. For this to be effective, the external diode must be placed close to the IC to minimize series inductance and have a significantly lower forward voltage drop than the internal diode. 10 Layout 10.1 Layout Guidelines The optimum performance of high- and low-side gate drivers cannot be achieved without taking due considerations during circuit board layout. Following points are emphasized. 1. A low ESR/ESL capacitor must be connected close to the IC, and between VDD and VSS pins and between HB and HS pins to support high peak currents being drawn from VDD during turnon of the external MOSFET. 2. To prevent large voltage transients at the drain of the top MOSFET, a low ESR electrolytic capacitor must be connected between MOSFET drain and ground (VSS). 3. To avoid large negative transients on the switch node (HS) pin, the parasitic inductances in the source of top MOSFET and in the drain of the bottom MOSFET (synchronous rectifier) must be minimized. 4. Grounding considerations: - a) The first priority in designing grounding connections is to confine the high peak currents from charging and discharging the MOSFET gate in a minimal physical area. This will decrease the loop inductance and minimize noise issues on the gate terminal of the MOSFET. The MOSFETs should be placed as close as possible to the gate driver. - b) The second high current path includes the bootstrap capacitor, the bootstrap diode, the local ground referenced bypass capacitor and low-side MOSFET body diode. The bootstrap capacitor is recharged on the cycle-by-cycle basis through the bootstrap diode from the ground referenced VDD bypass capacitor. The recharging occurs in a short time interval and involves high peak current. Minimizing this loop length and area on the circuit board is important to ensure reliable operation. 5. The resistor on the RT pin must be placed very close to the IC and seperated from high current paths to avoid noise coupling to the time delay generator which could disrupt timer operation. Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 15 LM5104 SNVS269D - JANUARY 2004 - REVISED DECEMBER 2014 www.ti.com 10.2 Layout Example CBOOT Q HS C VDD LM5104 Q LS Figure 21. LM5104 Component Placement 11 Device and Documentation Support 11.1 Trademarks All trademarks are the property of their respective owners. 11.2 Electrostatic Discharge Caution 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. 11.3 Glossary SLYZ022 -- TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 16 Submit Documentation Feedback Copyright (c) 2004-2014, Texas Instruments Incorporated Product Folder Links: LM5104 PACKAGE OPTION ADDENDUM www.ti.com 7-Nov-2014 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) LM5104M NRND SOIC D 8 95 TBD Call TI Call TI -40 to 125 5104 M LM5104M/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 5104 M LM5104MX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 5104 M LM5104SD/NOPB ACTIVE WSON DPR 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 5104SD LM5104SDX/NOPB ACTIVE WSON DPR 10 4500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 5104SD (1) 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. 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. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 7-Nov-2014 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. 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. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 15-Jul-2018 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM5104MX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM5104SD/NOPB WSON DPR 10 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LM5104SDX/NOPB WSON DPR 10 4500 330.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 15-Jul-2018 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM5104MX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM5104SD/NOPB WSON DPR 10 1000 210.0 185.0 35.0 LM5104SDX/NOPB WSON DPR 10 4500 367.0 367.0 35.0 Pack Materials-Page 2 MECHANICAL DATA DPR0010A SDC10A (Rev A) www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated (TI) reserves the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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