ZHCA962 October 2019
The LM5020 device is used to generate isolated LM5020 to supply MSP430 and isolators.
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 device includes a high-voltage start-up regulator that operates over a wide-input range up to 100 V. The PWM controller is designed for high-speed capability including an oscillator frequency range to 1 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier, precision reference, line undervoltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown.