HFC0500GS-Z is a fixed-frequency current-mode controller with internal slope compensation. It is specifically designed for the medium-power, offline, flyback, switch-mode power supplies. HFC0500GS-Z is a green-mode highly efficient controller. At light loads, the controller freezes the peak current and reduces its switching frequency down to 25kHz to offer excellent light-load efficiency. At very light loads, the controller enters burst mode to achieve very low standby power consumption.HFC0500GS-Z offers frequency jittering to help dissipate energy generated by conducted noise.HFC0500GS-Z employs overpower compensation function to narrow the difference of over power protection point between low line and high line.HFC0500GS-Z also has X-cap discharge function to discharge the X-cap when the input is unplugged. This aids in lowering no load power.HFC0500GS-Z features multiple protections that include thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), over-voltage protection (OVP), and brown-out protection.HFC0500GS-Z is available in an SOIC8-7A package. 9icnet Electronics is an authorized Monolithic Power Systems distributor.
Feature
- Fixed-frequency current-mode control with internal slope compensation
- Frequency foldback down to 25kHz at light loads
- Burst mode for low standby power consumption, meeting EuP Lot 6
- Frequency jitter to reduce EMI signature
- X-cap discharge function
- Adjustable overpower compensation
- Internal high-voltage current source
- VCC under-voltage lockout with hysteresis (UVLO)
- Brown-out protection on HV
- Overload protection with programmable delay
- Thermal shutdown (auto-restart with hysteresis)
- Latch-off for external over-voltage protection (OVP) and over-temperature protection (OTP) on TIMER
- Latch-off for Vcc over voltage protection
- Short-circuit protection
- Programmable soft start
