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LM5046MH Datasheet(PDF) 1 Page - Texas Instruments |
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LM5046MH Datasheet(HTML) 1 Page - Texas Instruments |
1 / 41 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 LM5046 PHASE-SHIFTED FULL-BRIDGE CONTROLLER WITH INTEGRATED GATE DRIVERS RD1 RD2 GATE DRIVE ISOLATION SR1 SR2 VCC VCC ISOLATION BOUNDARY SLOPE RAMP SSSR OVP Q1 Q2 Q3 Q4 LM5046 www.ti.com SNVS703G – FEBRUARY 2011 – REVISED MARCH 2013 LM5046 Phase-Shifted Full-Bridge PWM Controller with Integrated MOSFET Drivers Check for Samples: LM5046 1 FEATURES PACKAGES 2 • Highest Integration Controller for Small Form • TSSOP-28 Factor, High Density Power Converters • WQFN-28 (5mm x 5mm) • High Voltage Start-up Regulator DESCRIPTION • Intelligent Sync Rectifier Start-up Allows The LM5046 PWM controller contains all of the Linear Turn-on into Pre-biased Loads features necessary to implement a Phase-Shifted • Synchronous Rectifiers Disabled in UVLO Full-Bridge topology power converter using either mode and Hiccup Mode current mode or voltage mode control. This device is • Two Independent, Programmable Dead-Time intended to operate on the primary side of an isolated Adjustments to Enable Zero-Volt Switching. dc-dc converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A • Four High Current 2A Bridge Gate Drivers high and low side gate drivers for the four external • Wide-Bandwidth Opto-coupler Interface bridge MOSFETs, plus control signals for the • Configurable for either Current Mode or secondary side synchronous rectifier MOSFETs. Voltage Mode Control External resistors program the dead-time to enable zero-volt switching of the primary FETs. Intelligent • Dual-mode Over-Current Protection startup of the synchronous rectifiers allows monotonic • Resistor Programmed 2MHz Oscillator turn-on of the power converter even with pre-bias • Programmable Line UVLO and OVP 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. Simplified Phase-Shifted 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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