LM25037MTX+ National Semiconductor, LM25037MTX+ Datasheet

LM25037MTX+

Manufacturer Part Number

LM25037MTX+

Description

Manufacturer

National Semiconductor

Datasheets

1.LM25037MTX.pdf (24 pages)

2.LM25037MTX.pdf (26 pages)

Specifications of LM25037MTX+

Notes

NEW

Date_code

10+

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LM25037

Dual-Mode PWM Controller With Alternating Outputs

General Description

The LM25037 PWM controller contains all the features nec-

essary 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

LM25037 can be configured for either voltage mode or current

mode control with minimum external components. Two alter-

nating gate drive outputs are provided, each capable of 1.2A

peak output current. The LM25037 can be configured to op-

erate directly from the input voltage rail over an ultra-wide

range of 5.5V to 75V. Additional features include pro-

grammable maximum duty cycle limit, line under-voltage lock-

out, 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, preci-

sion reference and thermal shutdown.

Simplified Push-Pull Power Converter

300651

Features

■

Package

■

Ultra wide input operating range from 5.5V to 75V

Alternating outputs for double-ended topologies

Current-mode or feed-forward voltage-mode control

Programmable maximum duty cycle limit

2.0% feedback reference accuracy

High gain-bandwidth error amplifier

Programmable line under-voltage lockout (UVLO) with

adjustable hysteresis

Versatile dual mode over-current protection with hiccup

delay timer

Programmable soft-start

Precision 5V reference output

Current sense leading edge blanking

Resistor programmed 2 MHz capable oscillator

Oscillator synchronization capability with low frequency

lockout protection

TSSOP-16

October 15, 2008

www.national.com

30065101

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