1 Features

1• 105-V, 2-A Half-Bridge Gate Drivers

• Synchronous Rectifier-Control Outputs With

Programmable Delays

• High-Voltage (105-V) Start-up Regulator

• Voltage Mode Control With Line Feedforward and

Volt-Second Limiting

• Resistor Programmed, 2-MHz Capable Oscillator

• Patent Pending Oscillator Synchronization

• Programmable Line Undervoltage Lockout

• Line Overvoltage Protection

• Internal Thermal Shutdown Protection by•

Adjustable Soft-Start

• Versatile Dual Mode Overcurrent Protection With

Hiccup Delay Timer

• Cycle-by-Cycle Overcurrent Protection

• Direct Optocoupler Interface

• 5-V Reference Output

2 Applications

• Industrial Power Converters

• Telecom Power Converters

3 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 voltage feedforward. The

floating high-side gate driver is capable of operating

with supply voltages up to 105 V. Both the high-side

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

internal high voltage start-up 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 2 MHz. 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.