Datasheet > APW7026

APW7026

更新时间： 2024-02-09 06:56:25

品牌	Logo	应用领域
茂达 - ANPEC		控制器
页数	文件大小	规格书
11页	139K
描述
Advanced PWM and Dual Linear Power Controllers

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中文翻译

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数据手册

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APW7026 数据手册

APW7026

Advanced PWM and Dual Linear Power Control

Features

General Description

The APW7026 Provides the power control and

protection for three output voltages in VGA Card

•

3 Regulated Voltage are provided

• SYNC Switching Power for VTT(1.25V)

• ASYNC Switching Power for NVVDD(2.05V)

• Linear Regulator for FBVDDQ(2.5V)

Simple Single-Loop Control Design

• Voltage-Mode PWM Control

applications. It integrates two PWM controllers, one

linear controller as well as the monitoring and

protection functions into a single package. One PWM

controller (PWM1) regulates the termination voltage

VTT(1.25V) with a synchronous-rectified buck

converter. The second PWM controller (PWM2)

supplies the Core power NVVDD ( 2.05V ) with a

standard buck converter . The linear controller

regulates 2.5V power for FBVDDQ.

•

Excellent Output Voltage Regulation

• VTT Output: ±1% Over Temperature

• NVVDD Output:±2% Over Temperature

• FBVDDQ Output:±2.5% Over Temperature

Fast Transient Response

The APW7026 can monitor all the output voltages

(VTT ,NVVDD,FBVDDQ) and a single power good

signal is issued when the VTT is within ± 10% of

the reference voltage (V^REF1) and the other levels

are above its lower power good threshold voltage.

Additional built-in overvoltage protection (OVP) will

be started when the VTT output is above 118% of

the VREF1.The OVP function will shutdown the upper

MOSFET and turn on the lower MOSFET

until the over-voltage is disappeared. The PWM

controllers over-current function monitors the out-

put current by sensing the voltage drop across the

upper MOSFET rDS(ON), eliminating the need for a

current sensing resistor.

•

• On-Chip Feedback Compensation

• Full 0% to 100% Duty Ratio

•

Power-Good Output Voltage Monitor

Over-Voltage and Over-Current Fault Monitors

Small Converter Size

• Constant Frequency Operation(200kHz)

• Programmable Oscillator from 50kHz to

800KHz

• Reduce External Component Count

Pin Description

UGATE1

VCC

20 PHASE1

19 LGATE1

18 PGND

Applications

UGATE2

PHASE2

PGOOD

OCSET2

FB2

17 OCSET1

VSEN1

FB1

• VGA Card Power Regulation

FB3

GATE

GND

V3.3

FAULT/RT

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.

Rev.a.2 - Sep., 2001

www.anpec.com.tw

12 3 4 5 6 7...11

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