Skip to content 
1. Application Scenarios
Power semiconductors are used in household appliance control systems for motor drive and power management of variable frequency household appliances such as air conditioners, refrigerators, washing machines, vacuum cleaners, dishwashers, etc., with a power range of 50W-3kW.
2. The Role of the Product in the System
| Product Category | System Function |
| Rectifier bridge | AC input rectification, providing DC bus |
| PFC diode (FRD/SiC) | PFC boost diode |
| Fast recovery diode | PFC and auxiliary power rectification |
| SBD (Schottky) | Low voltage auxiliary power supply output rectification |
3. Recommended Product Model
| Recommended Series/Model | Recommended Series/Model | Key Parameters |
| Rectifier bridge (direct insertion/surface mount) | GBU/KBP/MB series (2A-25A/600V) | Suitable for household appliances |
| Fast recovery diode | FRxx series (600V) | PFC and auxiliary power supply |
| SBD (Schottky) | 45V–100V SBD | Auxiliary power output |
4. AC/DC Module Application
● The auxiliary power supply of the home appliance control board adopts flyback AC/DC, using MOSFET+RCD absorption diode+output SBD
● The rectifier bridge and filtering capacitor provide a DC bus
5. Application of PFC Circuit
● Variable frequency air conditioners/refrigerators need to add PFC to meet harmonic requirements (IEC 61000-3-2)
● Recommend single cycle PFC or interleaved PFC, using fast recovery diode+MOSFET
6. Common Customer Needs
| Demand | Our Response |
| Home appliances need to pass CCC certification | Provide CCC certification documents for all devices |
| The motor noise should be low | Recommend IPM solution to optimize driving waveform |
| Standby power consumption should meet ErP requirements | Recommended low-power auxiliary power supply solution |
| To resist power grid surges (2kV differential mode) | Provide recommendations for selecting rectifier bridges and varistors |
