LM5035 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – PWM Controller with Integrated Half-Bridge and SyncFET Drivers

January 2006
LM5035
PWM Controller with Integrated Half-Bridge and
SyncFET Drivers
General 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 volt-
age feed-forward. The floating high-side gate driver is ca-
pable 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 oscil-
lator 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
n 105V / 2A Half-Bridge Gate Drivers
n Synchronous Rectifier Control Outputs with
Programmable Delays
n High Voltage (105V) Start-up Regulator
n Voltage mode Control with Line Feed-Forward and Volt •
Second Limiting
n Resistor Programmed, 2MHz Capable Oscillator
n Patent Pending Oscillator Synchronization
n Programmable Line Under-Voltage Lockout
n Line Over-Voltage Protection
n Internal Thermal Shutdown Protection
n Adjustable Soft-Start
n Versatile Dual Mode Over-Current Protection with
Hiccup Delay Timer
n Cycle-by-Cycle Over-Current Protection
n Direct Opto-coupler Interface
n 5V Reference Output
Packages
n TSSOP-20EP (Thermally enhanced)
n LLP-24 (4mm x 5mm)
Simplified Application Diagram
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