LM5045 Series

Full-bridge PWM controller with Integrated MOSFET Drivers

Catalog

Full-bridge PWM controller with Integrated MOSFET Drivers

Part	Frequency - Switching [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Fault Protection	Package / Case [custom]	Package / Case	Package / Case [custom]	Topology	Control Features	Supplier Device Package	Mounting Type	Output Isolation	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Output	Utilized IC / Part	Voltage - Input [Max]	Voltage - Input [Min]	Board Type	Supplied Contents	Regulator Topology	Outputs and Type	Outputs and Type	Main Purpose	Current - Output
Texas Instruments LM5045MHX/NOPB	2 MHz	-40 °C	125 ¯C	Current Limiting Over Temperature Over Voltage	4.4 mm	28-PowerTSSOP	0.173 "	Full-Bridge	Frequency Control Soft Start Sync	28-HTSSOP	Surface Mount	Isolated	14 V	100 V
Texas Instruments LM5045SQ/NOPB	2 MHz	-40 °C	125 ¯C	Current Limiting Over Temperature Over Voltage		28-WFQFN Exposed Pad		Full-Bridge	Frequency Control Soft Start Sync	28-WQFN (5x5)	Surface Mount	Isolated	14 V	100 V
Texas Instruments LM5045MH/NOPB	2 MHz	-40 °C	125 ¯C	Current Limiting Over Temperature Over Voltage	4.4 mm	28-PowerTSSOP	0.173 "	Full-Bridge	Frequency Control Soft Start Sync	28-HTSSOP	Surface Mount	Isolated	14 V	100 V
Texas Instruments LM5045SQX/NOPB	2 MHz	-40 °C	125 ¯C	Current Limiting Over Temperature Over Voltage		28-WFQFN Exposed Pad		Full-Bridge	Frequency Control Soft Start Sync	28-WQFN (5x5)	Surface Mount	Isolated	14 V	100 V
Texas Instruments LM5045EVAL/NOPB															3.3 V	LM5045	75 V	36 V	Fully Populated	Board(s)	Full-Bridge	Isolated	1	DC/DC Step Down	30 A

Catalog

Full-bridge PWM controller with Integrated MOSFET Drivers

Key Features

• Highest Integration Controller for Small FormFactor, High-Density Power ConvertersHigh-Voltage Start-Up RegulatorIntelligent Sync Rectifier Start-Up Allows LinearTurnon Into Prebiased LoadsSynchronous Rectifiers Disabled in UVLO mode andHiccup ModeTwo Independent, Programmable Synchronous RectifierDead-Time AdjustmentsFour High-Current 2-A Bridge Gate DriversWide-Bandwidth Optocoupler InterfaceConfigurable for Either Current Mode or VoltageMode ControlDual-Mode Overcurrent ProtectionResistor Programmed 2-MHz OscillatorProgrammable Line UVLO and OVPHighest Integration Controller for Small FormFactor, High-Density Power ConvertersHigh-Voltage Start-Up RegulatorIntelligent Sync Rectifier Start-Up Allows LinearTurnon Into Prebiased LoadsSynchronous Rectifiers Disabled in UVLO mode andHiccup ModeTwo Independent, Programmable Synchronous RectifierDead-Time AdjustmentsFour High-Current 2-A Bridge Gate DriversWide-Bandwidth Optocoupler InterfaceConfigurable for Either Current Mode or VoltageMode ControlDual-Mode Overcurrent ProtectionResistor Programmed 2-MHz OscillatorProgrammable Line UVLO and OVP

Description

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters 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-side 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 leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up 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 LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters 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-side 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 leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up 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.