LM5035B

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SNVS613C – JULY 2009 – REVISED APRIL 2013

LM5035B PWM Controller with Integrated Half-Bridge and SyncFET Drivers

Check for Samples: LM5035B

1

FEATURES

PACKAGES

2

•

105V / 2A Half-Bridge Gate Drivers

•

TSSOP-20

•

Synchronous Rectifier Control Outputs with

•

WQFN-24 (4mm x 5mm)

Programmable Delays

DESCRIPTION

•

Synchronous Rectifiers Turned Off in

The LM5035B Half-Bridge Controller/Gate Driver

Shutdown Modes.

contains all of the features necessary to implement

•

Reduced Deadtime Between High and Low

half-bridge topology power converters using voltage

Side Drive for Higher Maximum Duty Cycle.

mode control with line voltage feed-forward.

•

High Voltage (105V) Start-up Regulator

The LM5035B is a functional variant of the LM5035A

•

Voltage mode Control with Line Feed-Forward

half-bridge PWM controller. The LM5035B provides

and Volt Second Limiting

higher maximum duty cycle and higher start-up

•

Resistor Programmed, 2MHz Capable

regulator

output

current

than

the

LM5035A

or

LM5035.

Also,

the

Synchronous

Rectifier

drive

Oscillator

outputs of the LM5035B are held low in shutdown

•

Programmable Line Under-Voltage Lockout

modes.

and Over-Voltage Protection

The LM5035, LM5035A, and LM5035B include a

•

Internal Thermal Shutdown Protection

floating high-side gate driver, which is capable of

•

Adjustable Soft-Start

operating with supply voltages up to 105V. Both the

•

Versatile Dual Mode Over-Current Protection

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

with Hiccup Delay Timer

peak. An internal high voltage startup regulator is

included, along with programmable line undervoltage

•

Cycle-by-Cycle Over-Current Protection

lockout (UVLO) and overvoltage protection (OVP).

•

Direct Opto-coupler Interface

The oscillator is programmed with a single resistor to

•

5V Reference Output

frequencies up to 2MHz. The oscillator 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.The differences between LM5035,

LM5035A, LM5035B, and LM5035C are summarized

in Table 2.

1

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2013, 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.