The SD7530 integrates a high-performance analog multiplier and zero current checker for power factor correction and critical conduction mode, respectively. The chip also integrates a current-sense comparator with blanking circuit and an output driver circuit with peak currents of -600mA and +800mA, making it ideal for driving high current MOSFETs.
In addition, the chip has a built-in soft-start circuit that prevents output voltage overshoot at light load start-up, reduces MOSFET voltage stress, and improves circuit reliability. The chip is also equipped with various abnormal state protection functions, such as short circuit protection, power supply overvoltage protection, VCC undervoltage lockout, primary overcurrent protection and overheat protection. The short-circuit protection function can enable the chip to obtain extremely low output short-circuit protection power consumption in the abnormal situation of output short-circuit, and avoid damage to the circuit; and the power supply over-voltage protection function can ensure that the chip is short-circuited or open-circuited. In this case, the system can be effectively protected from damage.
The SD7530 chip is based on the BCD process independently developed by Silan Microelectronics. It has outstanding features such as high integration, small footprint and easy machine debugging. It is available in SOP-8 and DIP-8 packages. The actual application plan is selected.
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