The EVHFC0500-S-00A Evaluation Board is designed to demonstrate the capabilities of HFC0500. HFC0500 is a fixed-frequency current mode controller with built-in slope compensation. At light load condition, it freezes the peak current and reduces its switching frequency down to 25kHz. As a result, it offers excellent efficiency at light load. At very light load, the controller enters burst mode. So very low standby power consumption can be achieved.
The EVHFC0500-S-00A is designed for TV, monitor and it typically drives 39W with dual outputs. One is 16VTYP, 1.5A load and the other is 5VTYP, 3A load from 90VAC/60Hz to 265VAC/50Hz.
The EVHFC0500-S-00A has excellent efficiency and meets 2kV IEC61000-4-5 surge immunity and EN55022 conducted EMI requirements. HFC0500 features variable protections like Thermal Shutdown (TSD), Vcc under Voltage Lockout (UVLO), Over Load Protection (OLP), Over Voltage Protection (OVP), Over Temperature Protection (OTP) and Brown-Out Protection.
HFC0500 is available in the SOIC8-7A package.
- Fixed-frequency current mode control operation with built-in slope compensation.
- Frequency Foldback down to 25kHz at light load condition
- Burst Mode for low standby power consumption
- Frequency jittering for a reduced EMI signature
- X-CAP discharge function
- Internal high voltage current source
- VCC Under Voltage Lockout with Hysteresis (UVLO)
- Brown-Out Protection on HV pin
- Over Load Protection with programmable delay
- Latch-off for external Over Voltage Protection(OVP) and Over Temperature Protection(OTP) on TIMER Pin
- Thermal Shutdown (auto restart with hysteresis)
- Short Circuit Protection
- Programmable soft start
Fixed Frequency Flyback Controller with Ultra-low No Load Power Consumption
HFC0500 is a fixed-frequency current-mode controller with internal slope compensation. It is specifically designed for the medium-power, off-line, flyback, switch-mode power supplies. HFC0500 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. HFC0500 offers frequency jittering to help dissipate energy generated by conducted noise. HFC0500 employs overpower compensation function to narrow the difference of over power protection point between low line and high line. HFC0500 also has X-cap discharge function to discharge the X-cap when the input is unplugged. This aids in lowering no load power. HFC0500 features multiple protections that include thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), over-voltage protection (OVP), and brown-out protection. HFC0500 is available in an SOIC8-7A package.