STMicroelectronics' STCH03 is a PWM quasi-resonant controller specifically designed for low standby power supplies. The built-in HV startup cell with zero power consumption, the fully integrated blocks for primary side constant current output regulation, and the advanced power management make this IC a great choice for building a high efficiency and low standby consumption power supply with high overall and excellent dynamic performances.
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- Constant current output regulation (CC) with no optocoupler: reduce the number of external components (no need of CC/CV on secondary side or sense resistor) and higher efficiency due to no sense resistor power losses
- 650 V embedded high voltage startup circuitry: allows controller to achieve low standby, below 10 mW
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- Quasi-resonant operation: high efficiency due to zero voltage switching operation
- Automatic self-supply: possibility to work in constant current down to 0 V output
- Feedforward compensation: output current regulation independent from mains variation
- Intelligent frequency jitter: EMI reduction
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Application
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- Wall plug charger smartphone/tablet
- Low power adapter notebook
- Qualcomm quick chargers, QC 2.0 and QC 3.0
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- USB PD adapters
- Auxiliary power supply
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