关键词: 家用电器, NTC电阻, 浪涌电流, 浪涌电压

Abstract: In the current switch power supply design of household appliances, NTC resistance has become a very important component in the power supply input circuit design to suppress the surge current. It is very important to choose a suitable NTC resistor for switching power supply with power over 10W. For switching power supplies over 10W, it is not suitable to print the transient surge current with a resistor with a fixed resistance value due to the heating and power consumption problems. Therefore, many companies choose NTC resistor to print the transient surge current.In order to effectively solve the damage of surge current and surge voltage at the moment of power on to the back stage of power supply, this paper discusses the function of NTC resistance value and position in the input loop.

Key words: Home appliance, NTC resistance, Surge current, Surge voltage