The HFG610-45 is a quasi-resonant (QR) flyback regulator with an integrated GaN FET, which is suitable for high-performance and high-frequency designs. Unlike conventional QR flyback regulators, the HFG610-45’s frequency foldback guarantees high efficiency across the entire load range.
The device is a secondary-side regulation (SSR) based primary regulator, and must work with secondary-side feedback circuitry. The higher frequency shrinks the passive component size and achieves higher power density. The HFG610-45 integrates a high-voltage start-up circuit and an X-capacitor discharger circuit, in addition to an ultra-low quiescent current (IQ) in burst mode. The no-load power consumption can be less than 30mW.
Main Features:
- Integrated 700V/270mΩ GaN FET
- Novel Patented Quasi-Resonant (QR) Control to Eliminate Audible Noise
- Frequency Foldback and Burst Mode for Low Light-Load Power Consumption
- Ultra-Wide Supply Voltage (VCC) Range to Support USB Power Delivery (PD) Applications
- Built-In X-Capacitor Discharger
- Built-In, High-Voltage Start-Up Circuit
- Ultra-Low Standby Power Consumption with PD Protocol IC (<30mW)
- Peak Current Mode Control and Leading-Edge Blanking (LEB)
- Under-Voltage Lockout (UVLO), VCC Over-Voltage Protection (OVP),
- Primary-Sense Output Over-Voltage Protection (ZCD OVP),
- Primary-Sense Output Under-Voltage Protection (ZCD UVP),
- Overload Protection (OLP), Internal Brown-In (BI) and Brownout (BO),
- Short-Circuit Protection (SCP),
- Current-Sense Short Protection (SSP), and Over-Temperature Protection (OTP)
- Available in QFN-21 (5mmx6mm) and QFN-25 (7mmx7mm) Packages
