Descriptions
SC3056 is a high frequency, quasi-resonant flyback PWM
converter with 650V GaN integrated (QR/DCM), which can
achieve high efficiency and reliability. The converter builtin
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.
SC3056 provides an adaptive switching frequency foldback
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.
SC3056 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.
SC3056 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.
2 Features
Integrated 650V GaN
Integrated high-voltage startup circuit with brown
in/out detection
Internal Soft Start
Integrated segment power supply circuit for extrawide
output range
Ultra-low operation current @Burst mode/Fault Mode
Up to 175KHz Switching Frequency
Frequency Jitter for EMI improvement
Valley switching operation @QR/DCM
Burst Mode @ Light Load & No Load
Internal over temperature protection
Comprehensive Protection
➢ VDD over voltage protection
➢ VDD under voltage lock out
➢ Cycle by cycle current limiting
➢ Two level over current protection
➢ Output over voltage protection
➢ Output short protection
➢ Over Load protection
DFN5*6 package available
3 Applications
USB-PD and QC Chargers
AC-DC adapters for Portable Devices
