LM5035A

www.ti.com

SNVS537F – JANUARY 2008 – REVISED APRIL 2013

LM5035A/LM5035A-1 PWM Controller with Integrated Half-Bridge and SyncFET Drivers

Check for Samples: LM5035A

1

FEATURES

DESCRIPTION

The LM5035A Half-Bridge Controller/Gate Driver

2

•

105V / 2A Half-Bridge Gate Drivers

contains all of the features necessary to implement

•

Synchronous Rectifier Control Outputs with

half-bridge topology power converters using voltage

Programmable Delays

mode control with line voltage feed-forward. The

•

High Voltage (105V) Start-up Regulator

LM5035A is a functional variant of the LM5035 half-

bridge

PWM

controller.

The

VCC

current

limit

•

Voltage mode Control with Line Feed-Forward

threshold has been increased to 35 mA. The soft start

and Volt • Second Limiting

and soft start currents have been increased from 50

•

Resistor Programmed, 2MHz Capable

µA to 100 µA. The BST UV threshold has been

Oscillator

lowered to less than the VCC UV threshold. The ratio

of the T1 and T2 delays on the SR1 and SR2 outputs

•

Patent Pending Oscillator Synchronization

has been increased from 2:1 to 3:1. The floating high-

•

Programmable Line Under-Voltage Lockout

side gate driver is capable of operating with supply

•

Line Over-Voltage Protection

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

•

Internal Thermal Shutdown Protection

gate drivers are capable of 2A peak. An internal high

voltage startup regulator is included, along with

•

Adjustable Soft-Start

programmable line undervoltage lockout (UVLO) and

•

Versatile Dual Mode Over-Current Protection

overvoltage

protection

(OVP).

The

oscillator

is

with Hiccup Delay Timer

programmed with a single resistor to frequencies up

to 2MHz. The oscillator can also be synchronized to

•

Cycle-by-Cycle Over-Current Protection

an external clock. A current sense input and a

•

Direct Opto-Coupler Interface

programmable timer provide cycle-by-cycle current

•

5V Reference Output

limit and adjustable hiccup mode overload protection.

The

differences

between

LM5035,

LM5035A,

PACKAGES

LM5035B, and LM5035C are summarized in Table 2.

•

HTSSOP-20

•

WQFN-24 (4mm x 5mm)

•

HTSSOP-28 (LM5035A-1 only)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2013, 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.