LM5020SD-1

• Internal start-up bias regulator
• Error amplifier
• High accuracy voltage reference
• Programmable soft-start
• 1A peak gate driver
• Maximum duty cycle limit (2 LM5020 LM5020 - 1 or 50% 80%)
• Programmable line undervoltage lockout (UVLO) with adjustable hysteresis,
• Cycle-by-cycle overcurrent protection
• Slope Compensation (LM5020 - 1)
• Programmable oscillator frequency synchronization capability
• Current sensing leading-edge blanking
• Thermal shutdown protection

illustrate

The LM5020 high voltage pulse width modulation (PWM) controller includes all the features required to implement a single-ended main power converter topology. Output voltage regulation is based on current mode control, simplifying loop compensation design while providing inherent feed-forward from the line. The LM5020 includes a high voltage start-up regulator that operates over a wide input voltage range up to 100V. The PWM controller is designed for high speed capability, including an oscillator with a frequency range of 1MHz and a total propagation delay of less than 100ns. Other features include an error amplifier, high-precision reference, line undervoltage lockout, cycle-by-cycle current limit, ramp compensation, soft-start, oscillator synchronization capability, and thermal shutdown. The controller is available in MSOP-10 and LLP-10 packages.

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• Communication power converters
• Industrial power converters
• +42 V automotive system