PWM Controller with Integrated Half-Bridge and SyncFET Drivers
National Semiconductor
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 feed-forward. The floating high-side gate driver is capable of operating with supply voltages up to 105V. Both the high-side and low-side gate drivers are capable of 2A peak. An internal high voltage startup 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 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.
Features
105V / 2A Half-Bridge Gate Drivers
Synchronous Rectifier Control Outputs with Programmable Delays
High Voltage (105V) Start-up Regulator
Voltage mode Control with Line Feed-Forward and Volt
Second Limiting
Resistor Programmed, 2MHz Capable Oscillator
Patent Pending Oscillator Synchronization
Programmable Line Under-Voltage Lockout
Line 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
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