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LM5046

Texas Instruments
Part Number LM5046
Manufacturer Texas Instruments
Description Phase-Shifted Full-Bridge PWM Controller
Published Apr 14, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5046 SNVS703H – FEBRUARY 201...
Datasheet PDF File LM5046 PDF File

LM5046
LM5046

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5046 SNVS703H – FEBRUARY 2011 – REVISED NOVEMBER 2014 LM5046 Phase-Shifted Full-Bridge PWM Controller With Integrated MOSFET Drivers 1 Features •1 Highest Integration Controller for Small Form Factor, High-Density Power Converters • High-Voltage Start-Up Regulator • Intelligent Sync Rectifier Start-Up Allows Linear Turn-on into Prebiased Loads • Synchronous Rectifiers Disabled in UVLO Mode and Hiccup Mode • Two Independent, Programmable Dead-Time Adjustments to Enable Zero-Volt Switching • Four High-Current 2-A Bridge Gate Drivers • Wide-Bandwidth Opto-Coupler Interface • Configurable for Either Current Mode or Voltage Mode Control • Dual-Mode Overcurrent Protection • Resistor Programmed 2-MHz Oscillator • Programmable Line UVLO and OVP 2 Applications • E-Bike • Military: Radar/Electronic Warfare • Power: Telecom DC/DC Module: Analog • Private Branch Exchange (PBX) • Solar Power Inverters • Vector Signal Generator • Microwave Oven • Point-to-Point Microwave Backhaul • Power: Telecom/Server AC/DC Supply: Dual Controller: Analog • Solar Micro-Inverter • TETRA Base Station • Washing Machine: Low-End 3 Description The LM5046 PWM controller contains all of the features necessary to implement a phase-shifted fullbridge 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 ...


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