NE8625 is a highly integrated switching power supply controller suitable for various topology structures of flyback/bump/boost. In isolated flyback power supply applications, the primary side voltage feedback PSR is used. The device is internally integrated with a 4V-100V startup circuit, 120V/0.1 Ω - LDMOS, and a "lossless" peak current sampling circuit. The peak current setting can be achieved simply through an external resistor.
The maximum operating frequency of the NE8625 can be programmed externally and can operate in both DCM and CCM modes. It can simulate frequency reduction under light loads to improve efficiency and reduce no-load power consumption. To improve the reliability of the power supply, the device also integrates a series of protection functions, including input undervoltage protection, output short circuit protection, output overvoltage protection, and over temperature protection. All control circuits and power MOS transistors are integrated on a single chip wafer. The devices using advanced BCD semiconductor technology can withstand high temperatures up to 180 ° C, and the use of enhanced heat dissipation HSOP8 packaging can minimize the temperature rise of the product.