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WT7522 Datasheet Download - Weltrend

Номер произв WT7522
Описание POWER SUPPLY PWM SUPERVISOR
Производители Weltrend
логотип Weltrend логотип 


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WT7522 Даташит, Описание, Даташиты
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 Даташит, Описание, Даташиты
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 Даташит, Описание, Даташиты
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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