LM5046 Series

Phase-shifted full-bridge PWM controller with integrated MOSFET drivers

Catalog

Phase-shifted full-bridge PWM controller with integrated MOSFET drivers

Part	Output Isolation	Supplier Device Package	Operating Temperature [Min]	Operating Temperature [Max]	Frequency - Switching [Max]	Package / Case	Control Features	Topology	Fault Protection	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Mounting Type	Outputs and Type	Outputs and Type	Board Type	Regulator Topology	Voltage - Output	Main Purpose	Supplied Contents	Voltage - Input [Max]	Voltage - Input [Min]	Utilized IC / Part	Package / Case [custom]	Package / Case [custom]
Texas Instruments LM5046SQX/NOPB	Isolated	28-WQFN (5x5)	-40 °C	125 ¯C	2 MHz	28-WFQFN Exposed Pad	Frequency Control Soft Start Sync	Full-Bridge	Current Limiting Over Temperature Over Voltage	14 V	100 V	Surface Mount
Texas Instruments LM5046SQ/NOPB	Isolated	28-WQFN (5x5)	-40 °C	125 ¯C	2 MHz	28-WFQFN Exposed Pad	Frequency Control Soft Start Sync	Full-Bridge	Current Limiting Over Temperature Over Voltage	14 V	100 V	Surface Mount
Texas Instruments LM5046EVAL/NOPB													Isolated	1	Fully Populated	Full-Bridge	3.3 V	DC/DC Step Down	Board(s)	75 V	36 V	LM5046
Texas Instruments LM5046MH/NOPB	Isolated	28-HTSSOP	-40 °C	125 ¯C	2 MHz	28-PowerTSSOP	Frequency Control Soft Start Sync	Full-Bridge	Current Limiting Over Temperature Over Voltage	14 V	100 V	Surface Mount											4.4 mm	0.173 "
Texas Instruments LM5046MHX/NOPB	Isolated	28-HTSSOP	-40 °C	125 ¯C	2 MHz	28-PowerTSSOP	Frequency Control Soft Start Sync	Full-Bridge	Current Limiting Over Temperature Over Voltage	14 V	100 V	Surface Mount											4.4 mm	0.173 "

Catalog

Phase-shifted full-bridge PWM controller with integrated MOSFET drivers

Key Features

• Highest Integration Controller for SmallForm Factor, High-Density Power ConvertersHigh-Voltage Start-Up RegulatorIntelligent Sync Rectifier Start-Up AllowsLinear Turn-on into Prebiased LoadsSynchronous Rectifiers Disabled in UVLO Modeand Hiccup ModeTwo Independent, Programmable Dead-TimeAdjustments to Enable Zero-Volt SwitchingFour High-Current 2-A Bridge Gate DriversWide-Bandwidth Opto-Coupler InterfaceConfigurable for Either Current Mode or VoltageMode ControlDual-Mode Overcurrent ProtectionResistor Programmed 2-MHz OscillatorProgrammable Line UVLO and OVPHighest Integration Controller for SmallForm Factor, High-Density Power ConvertersHigh-Voltage Start-Up RegulatorIntelligent Sync Rectifier Start-Up AllowsLinear Turn-on into Prebiased LoadsSynchronous Rectifiers Disabled in UVLO Modeand Hiccup ModeTwo Independent, Programmable Dead-TimeAdjustments to Enable Zero-Volt SwitchingFour High-Current 2-A Bridge Gate DriversWide-Bandwidth Opto-Coupler InterfaceConfigurable for Either Current Mode or VoltageMode ControlDual-Mode Overcurrent ProtectionResistor Programmed 2-MHz OscillatorProgrammable Line UVLO and OVP

Description

The LM5046 PWM controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high- and low-side gate drivers for the four external bridge MOSFETs, plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the dead-time to enable zero-volt switching of the primary FETs. Intelligent startup of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown. The LM5046 PWM controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high- and low-side gate drivers for the four external bridge MOSFETs, plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the dead-time to enable zero-volt switching of the primary FETs. Intelligent startup of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.