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APW7065KE-TU Datasheet(PDF) 1 Page - Anpec Electronics Coropration |
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APW7065KE-TU Datasheet(HTML) 1 Page - Anpec Electronics Coropration |
1 / 19 page Copyright © ANPEC Electronics Corp. Rev. A.1 - Feb., 2006 APW7065 www.anpec.com.tw 1 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Synchronous Buck PWM Controller • 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 R DS(ON) • 300KHz Fixed Switching Frequency • SOP-8 Package • Lead Free Available (RoHS Compliant) Features Applications General Description The APW7065 uses fixed 300KHz switching frequency, voltage mode, synchronous PWM controller which drives dual N-channel MOSFETs. Thedevice 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 temperature- compensated 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 DS(ON), comparing with internal V OCP (0.27V), 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 voltage of FB pin for short-circuit protection, when the V FB is less than 50% of V REF (0.4V), the controller will shutdown the IC directly. Pinouts SOP-8 • Graphics Card • Mother Board 1 2 3 4 8 7 6 5 PHASE COMP FB VCC BOOT UGATE GND LGATE |
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