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.