LM5035BMH National Semiconductor, LM5035BMH Datasheet

LM5035BMH

Manufacturer Part Number

LM5035BMH

Description

Manufacturer

National Semiconductor

Datasheets

1.LM5035BSQX.pdf (28 pages)

2.LM5035BMH.pdf (30 pages)

Specifications of LM5035BMH

Case

TSSOP

Date_code

10+

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Download datasheet (540Kb)

PWM Controller with Integrated Half-Bridge and SyncFET

Drivers

General Description

The LM5035B Half-Bridge Controller/Gate Driver contains all

of the features necessary to implement half-bridge topology

power converters using voltage mode control with line voltage

feed-forward.

The LM5035B is a functional variant of the LM5035A half-

bridge PWM controller. The LM5035B provides higher maxi-

mum duty cycle and higher start-up regulator output current

than the LM5035A or LM5035. Also, the Synchronous Recti-

fier drive outputs of the LM5035B are held low in shutdown

modes.

The LM5035, LM5035A, and LM5035B include a floating

high-side gate driver, which is capable of operating with sup-

ply voltages up to 105V. Both the high-side and low-side gate

drivers are capable of 2A peak. An internal high voltage start-

up regulator is included, along with programmable line un-

dervoltage lockout (UVLO) and overvoltage protection (OVP).

The oscillator is programmed with a single resistor to fre-

quencies up to 2MHz. The oscillator can also be synchronized

to an external clock. A current sense input and a pro-

grammable timer provide cycle-by-cycle current limit and ad-

justable hiccup mode overload protection.

Simplified Application Diagram

300913

LM5035B

Features

■

Packages

■

105V / 2A Half-Bridge Gate Drivers

Synchronous Rectifier Control Outputs with

Programmable Delays

Synchronous Rectifiers Turned Off in Shutdown Modes.

Reduced Deadtime Between High and Low Side Drive for

Higher Maximum Duty Cycle.

High Voltage (105V) Start-up Regulator

Voltage mode Control with Line Feed-Forward and Volt

Second Limiting

Resistor Programmed, 2MHz Capable Oscillator

Programmable Line Under-Voltage Lockout and Over-

Voltage Protection

Internal Thermal Shutdown Protection

Adjustable Soft-Start

Versatile Dual Mode Over-Current Protection with Hiccup

Delay Timer

Cycle-by-Cycle Over-Current Protection

Direct Opto-coupler Interface

5V Reference Output

TSSOP-20EP (Thermally enhanced)

LLP-24 (4mm x 5mm)

www.national.com

July 7, 2009

30091301

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