LM5035 datasheet(1/28 Pages) NSC

Part #	LM5035

Description	PWM Controller with Integrated Half-Bridge and SyncFET Drivers

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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LM5035

PWM Controller with Integrated Half-Bridge and

SyncFET Drivers

General Description

The LM5035 Half-Bridge Controller/Gate Driver contains all

of the features necessary to implement half-bridge topology

power converters using voltage mode control with line volt-

age feed-forward. The floating high-side gate driver is ca-

pable of operating with supply voltages up to 105V. Both the

high-side and low-side gate drivers are capable of 2A peak.

An internal high voltage startup regulator is included, along

with programmable line undervoltage lockout (UVLO) and

overvoltage protection (OVP). The oscillator is programmed

with a single resistor to frequencies up to 2MHz. The oscil-

lator can also be synchronized to an external clock. A current

sense input and a programmable timer provide cycle-by-

cycle current limit and adjustable hiccup mode overload

protection.

Features

n

105V / 2A Half-Bridge Gate Drivers

n

Synchronous Rectifier Control Outputs with

Programmable Delays

n

High Voltage (105V) Start-up Regulator

n

Voltage mode Control with Line Feed-Forward and Volt

•

Second Limiting

n

Resistor Programmed, 2MHz Capable Oscillator

n

Patent Pending Oscillator Synchronization

n

Programmable Line Under-Voltage Lockout

n

Line Over-Voltage Protection

n

Internal Thermal Shutdown Protection

n

Adjustable Soft-Start

n

Versatile Dual Mode Over-Current Protection with

Hiccup Delay Timer

n

Cycle-by-Cycle Over-Current Protection

n

Direct Opto-coupler Interface

n

5V Reference Output

Packages

n

TSSOP-20EP (Thermally enhanced)

n

LLP-24 (4mm x 5mm)

Simplified Application Diagram

20177501

January 2006

DS201775

www.national.com

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LM5035 Datasheet(PDF) 1 Page - National Semiconductor (TI)

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