APW7073 データシートの表示（PDF） - Anpec Electronics

部品番号

コンポーネント説明

メーカー

APW7073

Synchronous Buck PWM Controller

Anpec Electronics 

APW7073

Features

• Single 12V Power Supply Required

• 0.6V Reference with 1% Accurate

• Shutdown and Soft-start Function

• Programmable Frequency Range

from 50 kHz to 1000kHz

• Voltage Mode PWM Control Design

• Up to 100% Duty Cycle

• Under-Voltage Protection

• Over-Current Protection

• SOP-14, QFN-16 Packages

• Lead Free Available (RoHS Compliant)

Applications

• Graphic Cards

Synchronous Buck PWM Controller

General Description

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 temperature-

compensated reference voltage is designed to meet

the requirement of low output voltage applications.

The device includes a 200kHz free-running triangle-wave

oscillator that is adjustable from 50kHz to 1000kHz.

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 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 voltage

at FB pin (V ) for short-circuit protection, when the

FB

V is less than 50% of V , the controller will shut-

FB

REF

down the IC directly.

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.

Copyright © ANPEC Electronics Corp.

1

Rev. A.1 - Apr., 2006

www.anpec.com.tw

Share Link: