Low power consumption induction cooker switching power supply module

 　　The low-power monolithic switching power supply module FSD200 has an output power of 7W at 230V±15%, dual in-line packaging, low price, and very simple peripheral circuits. FSD200 has some notable features: ① The switching frequency can change from 130KHz to 138KHz within 4ms. This method of dithering the switching frequency within a certain band can disperse the harmonic energy and effectively suppress the harm caused by using a fixed switching frequency. Interference caused by higher harmonics. This not only reduces EMI, but also allows low-cost inductors to replace the line filters commonly used in switching power supplies . ② No feedback winding is required. FSD200 sends the external high voltage into the internal high-voltage regulator Hvreg to 7V through the Vstr pin connected to the DC bus, which is used as the control voltage of the chip, eliminating the need for feedback windings. Others include overload protection, overheating shutdown, soft start, bootstrap operation to reduce switching losses in standby mode, etc.