LM5026

·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

V_IN to GND ..............................................................................-0.3V to 105V
V_CC to GND ...............................................................................-0.3V to 16V
CS to GND ..................................................................................-0.3 to 1.0V
COMP Input Current ............................................................................10mA
All other inputs to GND .................................................................-0.3 to 7V
ESD Rating (Note 2)
Human Body Model .................................................................................2kV
Storage Temperature Range .............................................-65°C to 150°C
Junction Temperature .......................................................................150°C

The LM5026 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 LM5026 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.