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Monolithic Power Systems (MPS) HF500A-30 EMI Optimized Flyback Regulator is a fixed-frequency, current-mode regulator with built-in slope compensation. With EMI optimization, the device combines a 700V MOSFET and a full-featured controller into one chip for a low-power, offline, flyback, switch-mode power supply.
The regulator operates at a fixed frequency with frequency jittering at medium and heavy loads. Jittering helps reduce EMI energy on the switching frequency and its harmonics. Under light-load conditions, the regulator holds the peak current and reduces its switching frequency to 25kHz to offer excellent efficiency. The regulator enters burst mode at very light loads to achieve low standby power consumption.
Full protection features include brown-in and brownout, VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), VCC over-voltage protection (OVP), input OVP, and over-temperature protection (OTP). The Monolithic Power Systems (MPS) HF500A-30 features over-power line compensation to ensure that the overload protection point is independent of the input voltage. The HF500A-30 is available in a PDIP8-7B package.
