LM5020MMX-1/NOPB

开关控制器 100V Current Mode PWM Cntlr

DESCRIPON

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 LockoutUVLO 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