LM5026MT

General Description 

The LM5026MT PWM controller contains all of the features necessary to implement power converters utilizing the active clamp / reset technique with current mode control. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The device can be configured to control either a P-Channel or N-Channel clamp switch. The main gate driver features a compound configuration, consisting of both MOS and Bipolar devices, providing superior gate drive characteristics. The LM5026MT can be configured to operate with bias voltages over a wide input range of 8V to 100V. Additional features include programmable maximum duty cycle, line under-voltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1MHz capable oscillator with synchronization input / output capability, precision reference and thermal shutdown. 

Features
■ Current Mode Control
■ Internal 100V Start-up Bias Regulator
■ 3A Compound Main Gate Driver
■ High Bandwidth Opto-coupler Interface
■ Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
■ Versatile Dual Mode Over-Current Protection with hiccup delay timer
■ Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
■ Programmable Maximum Duty Cycle Clamp
■ Programmable Soft-start
■ Leading Edge Blanking
■ Resistor Programmed 1MHz Capable Oscillator
■ Oscillator Sync I/O Capability
■ Precision 5V Reference
Packages
■ TSSOP-16
■ LLP-16 (5x5 mm) Thermally Enhanced

Feature

(Picture:Pinout / Diagram)