APW7073

`Graphic Cards

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The APW7073 is voltage mode, synchronous PWM controller which drives dual N-channel MOSFETs. The device integrates all of the control, monitoring and
protecting functions into a single package, provides one controlled power output with under-voltage and over-current protections.

The APW7073 provides excellent regulation for output load variation. The internal 0.6V temperaturecompensated reference voltage is designed to meet the requirement of low output voltage applications. Thedeviceincludesa200kHzfree-runningtriangle-wave oscillator that is adjustable from 50kHz to 000kHz.

The APW7073 with 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 R_DS(ON). When the output current reaches the trip point, the controller will run the softstart function until the fault events are removed. The Under-Voltage Protection (UVP) monitors the voltage at FB pin (V_FB) for short-circuit rotection, when the V_FB is less than 50% of V_REF, the controller will shutdown the IC directly.