High Frequency Quasi-Resonant Flyback Converter
With GaN Integrated
PQ3057B
High Frequency Quasi-Resonant Flyback Converter
With GaN Integrated
PQ3057B is a high frequency, quasi-resonant flyback PWM converter with 700V GaN integrated (QR/DCM), which can achieve high efficiency and reliability. The converter with x-cap discharge function built-in high voltage start-up circuit through HV pin. Therefore, extremely low standby power consumption and super-fast start-up time can be obtained by HV pin. PQ3057B provides an adaptive switching frequency fold_x0002_back to achieve higher efficiency in the whole loading range. It operates in QR and DCM with valley switching for high efficiency. And at no load, the IC will operate in burst mode to reduce power consumption. PQ3057B provides functions of low start-up current, fast start-up, low standby power consumption. The burst mode with extremely low operation current (350uA) can significantly reduce standby power consumption to meet the efficiency regulations. The converter integrates a segment power supply circuit for VDD power supply, which is especially suitable for applications with wide output voltage range. PQ3057B offers comprehensive protections to prevent the circuit from damage under abnormal conditions. Furthermore, the features of frequency jittering and smart driving function can minimize the noise and improve EMI performance.
PQ3057B is a high frequency, quasi-resonant flyback PWM converter with 700V GaN integrated (QR/DCM), which can achieve high efficiency and reliability. The converter with x-cap discharge function built-in high voltage start-up circuit through HV pin. Therefore, extremely low standby power consumption and super-fast start-up time can be obtained by HV pin. PQ3057B provides an adaptive switching frequency fold_x0002_back to achieve higher efficiency in the whole loading range. It operates in QR and DCM with valley switching for high efficiency. And at no load, the IC will operate in burst mode to reduce power consumption. PQ3057B provides functions of low start-up current, fast start-up, low standby power consumption. The burst mode with extremely low operation current (350uA) can significantly reduce standby power consumption to meet the efficiency regulations. The converter integrates a segment power supply circuit for VDD power supply, which is especially suitable for applications with wide output voltage range. PQ3057B offers comprehensive protections to prevent the circuit from damage under abnormal conditions. Furthermore, the features of frequency jittering and smart driving function can minimize the noise and improve EMI performance.
