NE8627 is a highly integrated power control chip suitable for various topology structures (Flyback Boost Buck) and output voltage feedback methods (SSR PSR resistive voltage sharing). PSR feedback can be achieved at operating frequencies of hundreds of KHz, and the built-in output voltage sampling circuit can operate simultaneously in CCM and DCM modes, with a requirement for sampling voltage time width as low as 400nS; The built-in loop compensation circuit with fast dynamic response function ensures excellent stability and dynamic response indicators of the switching power supply.
The NE8627 integrates multiple control functions and has a simple peripheral, allowing for the design of peripheral parameters according to actual needs. Three functions are achieved through a resistor, including startup, feedforward compensation, and programming the turn-off speed of the built-in power transistor; The peak current of the power transistor is sampled through a resistor programmed ‘lossless‘ current sampling; Both input undervoltage protection and input overvoltage protection thresholds can be designed simultaneously through two resistors.
The NE8627 integrates functions such as over power protection, output short circuit protection, output overvoltage protection, over temperature protection, etc. It can achieve self recovery after abnormal situations are cancelled, maximizing the reliability of the switching power supply system.