LM5025

·Internal Start-up Bias Regulator
·3A Compound Main Gate Driver
· Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
· Voltage Mode Control with Feed-Forward
·Adjustable Dual Mode Over-Current Protection
· Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
· Volt x Second Clamp
· Programmable Soft-start
· Leading Edge Blanking
·Single Resistor Programmable Oscillator
·Oscillator UP / DOWN Sync Capability
· Precision 5V Reference
· Thermal Shutdown

V_IN to GND ...............................................................-0.3V to 100V
V_CC to GND ................................................................-0.3V to 16V
CS1, CS2 to GND .......................................................-0.3 to 1.00V
All other inputs to GND ...................................................-0.3 to 7V
ESD Rating (Note 2)
Human Body Model ..................................................................2kV
Machine Model .......................................................................200V
Storage Temperature Range ...............................-55°C to 150°C
Junction Temperature .........................................................150°C

The LM5025 PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. The device can be configured to control either a P-Channel clamp switch or an N-Channel clamp switch. 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 active clamp output can be configured for either a guaranteed overlap time (for P-Channel switch applications) or a guaranteed deadtime (for N_Channel applications).

The two internal compound gate drivers parallel both MOS and Bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1MHz and total PWM and current sense propagation delays less than 100ns. The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13V to 90V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, precision reference and thermal shutdown.