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LM5045 Datasheet(PDF) 1 Page - Texas Instruments |
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LM5045 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 38 page Vout T1 T1 Vin ISOLATED FEEDBACK SSOFF VCC REF AGND PGND SS RES RT UVLO VIN HO1 BST1 HS1 LO1 CS LO2 HS2 BST2 HO2 COMP LM5045 FULL-BRIDGE CONTROLLER WITH INTEGRATED GATE DRIVERS RD1 RD2 GATE DRIVE ISOLATION SR1 SR2 VCC VCC ISOLATION BOUNDARY SLOPE RAMP SSSR OVP LM5045 www.ti.com SNVS699G – FEBRUARY 2011 – REVISED MARCH 2013 Full-Bridge PWM Controller with Integrated MOSFET Drivers Check for Samples: LM5045 1 FEATURES DESCRIPTION The LM5045 PWM controller contains all of the 2 • Highest Integration Controller for Small Form features necessary to implement Full-Bridge topology Factor, High Density Power Converters power converters using either current mode or • High Voltage Start-up Regulator voltage mode control. This device is intended to • Intelligent Sync Rectifier Start-up Allows operate on the primary side of an isolated dc-dc converter with input voltage up to 100V. This highly Linear Turn-on into Pre-biased Loads integrated controller-driver provides dual 2A high and • Synchronous Rectifiers Disabled in UVLO low side gate drivers for the four external brige mode and Hiccup Mode MOSFETs plus control signals for the secondary side • Two Independent, Programmable synchronous rectifier MOSFETs. External resistors Synchronous Rectifier dead-time Adjustments program the leading and trailing edge dead-time between the main and synchronous rectifier control • Four High Current 2A Bridge Gate Drivers signals. Intelligent startup of the synchronous • Wide-Bandwidth Opto-coupler Interface rectifiers allows monotonic turn-on of the power • Configurable for either Current Mode or converter even with pre-bias load conditions. Voltage Mode Control Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft- • Dual-mode Over-Current Protection start, synchronous rectifier soft-start and a 2 MHz • Resistor Programmed 2MHz Oscillator capable oscillator with synchronization capability and • Programmable Line UVLO and OVP thermal shutdown. PACKAGES • HTSSOP 28 pin • WQFN 28 pin (5mm x 5mm) Simplified Full-Bridge Power Converter 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2011–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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