VPS8504B

VPS8504B is a push-pull transformer driver designed specifically for small volume, low standby power consumption, and low-power isolation power supplies. Its periphery only needs to be matched with simple input and output filtering capacitors, isolation transformers, and rectification circuits to achieve isolation power supplies with 3.3V or 5V input, 3.3V~24V output, and output power of 1-3W. VPS8504B integrates an oscillator internally, providing a pair of high-precision complementary signals to drive two N-channel MOSFETs. The internal design of the chip follows a symmetrical structure, which can effectively ensure the high symmetry of the two power MOSFETs and avoid circuit bias during operation. The chip has an enable pin EN and can choose two different operating frequencies through the CLK pin floating or grounded. At the same time, a high-precision dead zone control circuit is designed internally to ensure that there is no common phenomenon under various working conditions.