WT7522 PDF даташит
Спецификация WT7522 изготовлена «Weltrend» и имеет функцию, называемую «POWER SUPPLY PWM SUPERVISOR». |
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Детали детали
Номер произв | WT7522 |
Описание | POWER SUPPLY PWM SUPERVISOR |
Производители | Weltrend |
логотип |
9 Pages
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偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
WT7522
POWER SUPPLY PWM SUPERVISOR
Data Sheet
Version 1.10
April 29, 2009
The information in this document is subject to change without notice.
©Weltrend Semiconductor, Inc. All Rights Reserved.
新竹市科學工業園區工業東九路 24 號 2 樓
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.
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WT7522
Data Sheet Rev. 1.10
GENERAL DESCRIPTION
The WT7522 is a pulse–width modulation (PWM) control circuit with complete protection circuits for used in the
SMPS (Switched Mode Power Supply). It contains various functions, which are Over Voltage Protection, Under
Voltage Protection, Power Good Output (PG), Remote On/Off control, Opamp and etc. It can minimize external
components of switching power supply systems in personal computer.
Over Voltage Protection (OVP) monitors 3.3V, 5V, 12V and PT input voltage level. Under Voltage Protection
(UVP) monitors 3.3V, 5V, 12V and one negative voltage input voltage level. Power Good Output monitors the
voltage level of power supply.
FEATURES
• Complete PWM Control and Protection Circuitry
• Over Voltage Protection for 3.3V / 5V / V12 / PT
• 3.3V / 5V / 12V Under Voltage Warning for PG Low
• Under Voltage Protection for 3.3V / 5V / V12
• Two Opamp loop function
• 300ms PG Time Delay
• Power Good Output is Open Drain Output
• Push-pull PWM Output
• Remote ON/OFF function De–bounce Time
• Soft-Start function built-in
• 20–Pin Dual In–line Package
PIN CONFIGURATION
PSON
V33
V5
PT
DET
NVP
V12
C2
C1
PG
WT7522
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
VCC
RT
SS
VADJ
COMP
GND
OP1
IN1
IN2
OP2
Ordering Number
WT7522-NG200WT
WT7522-NN200WT
Package Type
Green DIP 20
Pb free DIP 20
Weltrend Semiconductor, Inc.
Page 2
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WT7522
Data Sheet Rev. 1.10
PIN DESCRIPTION
Pin No.
Pin Name
1 PSON
2 V33
3 V5
4 PT
5 DET
6 NVP
7 V12
8 C2
9 C1
10 PG
11 OP2
12 IN2
13 IN1
14 OP1
15 GND
16 COMP
17 VADJ
18 SS
19 RT
20 VCC
TYPE
I
I
I
I
I
I
I
O
O
O
O
I
I
O
P
O
I
I
I
P
FUNCTION
Remote on/off input.
PSON=”low” that means the main SMPS is turned-on.
PSON=”high”, the main SMPS is turned-off.
OVP/UVP sense input FOR 3.3V.
OVP/UVP sense input for 5V.
Over-power sense input.
Power good detection input.
UVP sense input for negative voltage.
OVP/UVP sense input for 12V.
PWM totem-pole output.
PWM totem-pole output.
Power good signal.
PG= ”high” means “power good”.
Output for second Opamp loop.
Input for second Opamp loop.
Input for first Opamp loop.
Output for first Opamp loop.
Ground
Error amplifier output.
Input of error amplifier.
The soft-start function set through an external capacitor.
Reference setting by an external resistor.
Supply voltage.
Weltrend Semiconductor, Inc.
Page 3
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