LM5020MM-2

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

illustrate

The LM5020 high voltage pulse width modulation (PWM) controller contains all the functions needed to implement a single-ended main power converter topology. Output voltage adjustment is based on current mode control, simplifying loop compensation design while providing inherent feed-forward of the line. 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 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 both MSOP-10 and LLP-10 packages.

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