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APW7065

Anpec Electronics Coropration
Part Number APW7065
Manufacturer Anpec Electronics Coropration
Description Synchronous Buck PWM Controller
Published Nov 17, 2008
Detailed Description APW7065 Synchronous Buck PWM Controller Features • Single 12V Power Supply Required • Fast Transient Response - 0~90% ...
Datasheet PDF File APW7065 PDF File

APW7065
APW7065

Overview
APW7065 Synchronous Buck PWM Controller Features • Single 12V Power Supply Required • Fast Transient Response - 0~90% Duty Ratio • 0.
8V Reference with 1% Accuracy • Shutdown Function by Controlling COMP Pin Voltage • Internal Soft-Start (3.
4ms) Function • Voltage Mode PWM Control Design • Under-Voltage Protection • Over-Current Protection - Sense Low Side MOSFET’s RDS(ON) • 300kHz Fixed Switching Frequency • SOP-8 Package • Lead Free and Green Devices Available (RoHS Compliant) Simplified Application Circuit 12V VIN APW7065 L VOUT Pin Configuration General Description The APW7065 uses fixed 300kHz switching frequency, voltage mode, and synchronous PWM controller which drives dual N-channel MOSFETs.
The device integrates the control, monitoring and protection functions into a single package, provides one controlled power output with under-voltage and over-current protections.
The APW7065 provides excellent regulation for output load variation.
The internal 0.
8V temperaturecompensated reference voltage is designed to meet the requirement of low output voltage applications.
An built-in digital soft-start with fixed soft-start interval prevents the output voltage from overshoot as well as limiting the input current.
The APW7065 with excellent protection functions: POR, OCP and UVP.
The Power-On-Reset (POR) circuit can monitor VCC supply voltage exceeds its threshold voltage while the controller is running, and a built-in digital soft-start provides output with controlled voltage rise.
The Over-Current Protection (OCP) monitors the output current by using the voltage drop across the lower MOSFET’s R , comparing with DS(ON) internal V (0.
29V), when the output current reaches OCP the trip point, the controller will run the soft-start function until the fault events are removed.
The UnderVoltage Protection (UVP) monitors the voltage of FB pin for short-circuit protection, when the VFB is less than 50% of VREF (0.
4V), the controller will shutdown the IC directly.
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