LM5020SD-1 Datasheet PDF - TI

DESCRIPTION

●The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns.

●FEATURES

●• Internal Start-up Bias Regulator

●• Error Amplifier

●• Precision Voltage Reference

●• Programmable Softstart

●• 1A Peak Gate Driver

●• Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)

●• Programmable Line Under Voltage Lockout(UVLO) with Adjustable Hysteresis

●• Cycle-by-Cycle Over-Current Protection

●• Slope Compensation (LM5020-1)

●• Programmable Oscillator Frequency with Synchronization Capability

●• Current Sense Leading Edge Blanking

●• Thermal Shutdown Protection