LM5037

UVLO

PGND

AGND

COMP

OUTB

OUTA

VCC

SS

RT1

REF

RES

CS

VIN

VIN

VOUT

RT2

FB

RAMP

Isolated

Feedback

LM5037

www.ti.com

SNVS578B – NOVEMBER 2008 – REVISED JANUARY 2010

LM5037 Dual-Mode PWM Controller With Alternating Outputs

Check for Samples: LM5037

1

FEATURES

•

Programmable line under-voltage lockout

(UVLO) with adjustable hysteresis

2

•

High voltage (100V) start-up regulator

•

Versatile dual mode over-current protection

•

Alternating outputs for double-ended

with hiccup delay timer

topologies

•

Programmable soft-start

•

Current-mode or feed-forward voltage-mode

•

Precision 5V reference output

control

•

Current sense leading edge blanking

•

Programmable maximum duty cycle lLimit

•

Resistor programmed 2 MHz capable oscillator

•

2% feedback reference accuracy

•

Oscillator synchronization capability with low

•

High gain-bandwidth error amplifier

frequency lockout protection

DESCRIPTION

The LM5037 PWM controller contains all the features necessary to implement balanced double-ended power

converter topologies, such as push-pull, half-bridge and full-bridge. These double-ended topologies allow for

higher efficiencies and greater power densities compared to common single-ended topologies such as the

flyback and forward. The LM5037 can be configured for either voltage mode or current mode control with

minimum external components. Two alternating gate drive outputs are provided, each capable of 1.2A peak

output current. The LM5037 can be configured to operate directly from the input voltage rail over a wide range of

13V to 100V. Additional features include programmable maximum duty cycle limit, line under-voltage lockout,

cycle-by-cycle current limit and a hiccup mode fault protection with adjustable timeout delay, soft-start and a 2

MHz capable oscillator with synchronization capability, precision reference and thermal shutdown.

Package

•

TSSOP-16

Simplified Push-Pull Power Converter

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2010, 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.