The MOSFET solution for washing machines is designed for a full range of models including pulsars, drums, and integrated washing and drying machines. It focuses on the core requirements of the new national standard for first level energy efficiency, strong resistance to vibration and humidity, and 7 × 24-hour long life. It covers the entire chain of BLDC variable frequency main drive, water pump load, and functional peripheral management, and is suitable for all scenarios from common fixed frequency models to high-end AI intelligent washing and drying integrated machines.

Core Power Link Scenario Component Solution
1. Main variable frequency motor drive link
As the "power heart" of washing machines, the core requirements are high torque output, low torque pulsation, achieving silent washing and precise speed control:
High power flagship solution: STMicroelectronics SLLIMM 2nd series IPM, built-in 600V super junction MOSFET three-phase inverter bridge, current coverage of 8-35A, top cooling direct copper packaging, suitable for high-power washing and drying integrated machines under 3kW, with a machine efficiency exceeding 98%, supporting 20kHz high-frequency FOC control, and reducing washing noise by more than 6dB
Mainstream household solution: VBM1606, 60V/120A, TO-220 package, Rds (on) as low as 4m Ω under SGT process, gate charge Qg only 47nC, switch speed twice as fast as traditional devices, suitable for conventional drum washing machines under 10kg, long-term dehydration, high-speed operation, stable temperature rise
High reliability alternative solution: Infineon SPP80N06S2L-H5, 55V/80A, OptiMOS ™ Technology, single pulse avalanche energy up to 700mJ, extremely strong resistance to blockage and impact, suitable for the harsh working conditions of frequent forward and reverse rotation of pulsator washing machines

2. Drive link of drainage pump/circulation pump
The core requirements are resistance to start stop shocks, high current redundancy, and ability to cope with frequent start stop and stall conditions:
Mainstream preferred solution: VBGQF1405, 40V/60A, DFN8 (3x3) package, with Rds (on) of only 4.2m Ω at 10V under SGT technology, 60A continuous current peak can reach 120A, 24V/100W drainage pump single tube loss is only 0.07W, and long-term reliability is fully achieved in humid vibration environment
High flow circulating pump solution: TLE4976-1K, 40V/209A, Rds (on) as low as 1.25m Ω, ultra large current margin suitable for the large capacity water circulation system of the washing and drying integrated machine, temperature rise control within 25K during full load operation

3. Inlet valve/electronic door lock control link
The core requirements are high reliability on/off, low standby power consumption, and adaptability to inductive loads with frequent switching:
Universal adaptation solution: VBC1307, 30V/10A, TSSOP8 package, Rds (on) of only 7m Ω at 10V, 1.7V low threshold voltage can be directly driven by MCU GPIO without the need for additional driving circuits, achieving millisecond level precise on-off of the inlet valve and increasing the response speed of the door lock by 30%
High integration solution: AO3401A, SOT-23 ultra small package, suitable for 24V solenoid valve on/off scenarios. Only 1N4007 freewheeling diode needs to be connected in parallel to the periphery to completely suppress inductive load off peaks, significantly reducing BOM costs

4. Auxiliary power supply and intelligent management process
The core requirement is ultra small packaging and low voltage drive, which helps to reduce the standby power consumption of the whole machine to below 0.5W:
High integration solution: VBK5213N, SC70-6 ultra small package, internal integration of ± 20V N P complementary MOSFET, saving 70% PCB space compared to discrete solutions. 1.0V-1.2V ultra-low threshold can be directly driven by 1.8V MCU for standby power path switching and small signal level conversion
Auxiliary power supply solution: Jingfeng Mingyuan BPA861X series, built-in 700V high voltage MOSFET, integrated high voltage starting circuit, no-load power consumption<50mw, greatly reducing the number of peripheral devices, suitable for auxiliary power supply scenarios of the whole machine control board