APW7074

APW7074 Features Single 12V Power Supply Required 0.8V Reference with 1% Accuracy Shutdown and Soft-Start Function 300kHz Fixed Switching Frequency Voltage Mode PWM Control Design Up to 100% Duty Cycle Under-Voltage Protection Over-Current Protection SOP-14 Package Lead Free and Green Devices Available (RoHS Compliant) Applications Graphic Cards Synchronous Buck PWM Controller General Description The APW7074 is a voltage mode synchronous PWM controller with fixed 300kHz switching frequency, which drivers dual N-channel MOSFETs. The device integrates the controling, monitoring, and protecting functions into a single package, which provides a controlled power output with under-voltage and over-current protections. The APW7074 provides excellent regulation for output load variation. The internal 0.8V temperature-compensated reference voltage is designed for the requirements of low output voltage applications. The APW7074 has excellent protection functions: POR, OCP, and UVP. The Power-On-Reset (POR) circuit can monitor the VCC, EN, and OCSET voltage to make sure the supply voltage exceeds their threshold voltage while the controller is running. The Over-Current Protection (OCP) monitors the output current by using the voltage drop across the upper and lower MOSFET’s RDS .(ON) When the output current reaches the trip point, the controller will run the soft-start function until the fault events are removed. The Under-Voltage Protection (UVP) monitors the vol...