ERROR AMP

& ISOLATION

ERROR AMP

& ISOLATION

CS1

CS2

OUT1

OUT2

COMP1

COMP2

VIN

SS1

SS2

VCC

DCL

RES

UVLO

LM5032

VCC

3.3V

2.5V

RT

Sync

36V to 75V

Input

GND1

GND2

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

Reference

Design

LM5032

SNVS344B – MARCH 2005 – REVISED DECEMBER 2014

LM5032 High-Voltage Dual Interleaved Current Mode Controller

1 Features

3 Description

The LM5032 dual current mode PWM controller

1

•

Two Independent PWM Current Mode Controllers

contains all the features needed to control either two

•

Integrated High-Voltage Startup Regulator

independent forward dc/dc converters or a single high

•

Compound 2.5-A Main Output Gate Drivers

current converter comprised of two interleaved power

stages. The two controller channels operate 180° out

•

Single Resistor Oscillator Setting to 2 MHz

of phase thereby reducing input ripple current. The

•

Synchronizable Oscillator

LM5032 includes a startup regulator that operates

•

Programmable Maximum Duty Cycle

over a wide input range up to 100 V and compound

(bipolar + CMOS) gate drivers that provide a robust

•

Maximum Duty Cycle Fold-Back at High-Line

2.5-A peak sink current. The adjustable maximum

Voltage

PWM duty cycle reduce stress on the primary side

•

Adjustable Timer for Hiccup Mode Current

MOSFET

switches.

Additional

features

include

Limiting

programmable line undervoltage lockout, cycle-by-

•

Integrated Slope Compensation

cycle current limit, hiccup mode fault operation with

adjustable response time, PWM slope compensation,

•

Adjustable Line Undervoltage Lockout

soft-start, and a 2-MHz capable oscillator with

•

Independently Adjustable Soft-Start (Each

synchronization capability.

Regulator)

•

Direct Interface with Opto-Coupler Transistor

Device Information(1)

•

Thermal Shutdown

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

TSSOP 16-Pin Package

LM5032

TSSOP (16)

5.00 mm x 4.40 mm

(1) For all available packages, see the orderable addendum at

2 Applications

the end of the datasheet.

•

Telecommunication Power Converters

•

Industrial Power Converters

•

42-V Automotive Systems

Typical Application Circuit

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.