Weltrend WT7527-NN160-1D, WT7527-NN161-1D, WT7527-SN160-1D, WT7527-SN161-1D Schematic [ru]
偉詮電子股份有限公司
偉詮電子股份有限公司
偉詮電子股份有限公司偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
WT7527
PC POWER SUPPLY SUPERVISOR
Data Sheet
Version 1.20
June 22, 2007
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:886-3-5794278.5770419
Email:support@weltrend.com.tw
WT7527
WT7527
Rev. 1.20
GENERAL DESCRIPTION
The WT7527 provides protection circuits, power good output (PGO), fault protection latch (FPOB),
and a protection detector function (PSONB) control. It can minimize external components of switching
power supply systems in personal computer.
The Over Voltage Detector (OVD) monitors VX, V33, V5, V12A and V12B input voltage level. The
Under Voltage Detector (UVD) monitors V33, V5, V12A and V12B input voltage level. The Over Current
Detector (OCD) monitor I33&V33, I5&V5, I12A&V12A and I12B&V12B input current sense. The pin VX
provides an extra protection function. When OVD or UVD or OCD or VX detect the fault voltage level,
the FPOB is latched HIGH and PGO go low. The latch can be reset by PSONB go HIGH. There is 4 ms
delay time for PSONB turn off FPOB.
When OVD and UVD and OCD detect the right voltage level, the power good output (PGO) will be
issue.
FEATURES
• The Over Voltage Detector (OVD) monitors VX, V33, V5, V12A and V12B input voltage.
• The Under Voltage Detector (UVD) monitors V33, V5, V12A and V12B input voltage.
• The Over Current Detector (OCD) monitors I33&33, I5&V5, I12A&V12A and I12B&V12B input pins.
• The VX > 1.2V provide an extra protection.
• Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
• 75 / 600 ms time delay for UVD / OCD / VX .
• 300 ms time delay for PGO.
• 38 ms for PSONB input signal De–bounce.
• 14 us for OVD internal signal De–glitch.
• 60 us for UVD / VX internal signal De–glitch.
• 20 ms for OCD internal signal De–glitch.
• 73 us for PGI internal signal De–glitch.
• 4 ms for PSONB turn-off FPOB.
PIN ASSIGNMENT AND PACKAGE TYPE
Pin assignment
PGI
GND
FPOB
PSONB
I12A
I12B
V12B
RI
16
1
2
3
4
5
6
7
8
15
14
13
12
11
10
9
PGO
VCC
V5
V33
V12A
I33
I5
VX
Weltrend Semiconductor, Inc.
Page 2
WT7527
Rev. 1.20
ORDERING INFORMATION
Part Number Package Type Note
WT7527–NN160–1D
WT7527–NN161–1D
WT7527–SN160–1D
WT7527–SN161–1D
16-Pin Plastic DIP, Pb-free
16-Pin Plastic SOP, Pb-free
PIN DESCRIPTION
Pin Name
PGI I Power good input signal pin
GND P Ground
FPOB O Fault protection output pin, open drain output
PSONB I On/Off switch input
I12A I 12VA over current protection sense input
RI I Current sense adjust input
I12B I 12VB over current protection sense input
V12B I 12VB over voltage & under voltage & over current sense input
VX I Extra protection sense input
I5 I 5V over current protection sense input
I33 I 3.3V over current protection sense input
V12A I 12VA over voltage & under voltage & over current sense input
V33 I 3.3V over voltage & under voltage & over current sense input pin
V5 I 5V over voltage & under voltage & over current sense input pin
VCC I Power supply
PGO O Power good output signal pin, open drain output
I/O Description
pin
pin
Weltrend Semiconductor, Inc.
Page 3
BLOCK DIAGRAM
WT7527-160
VCC
WT7527
Rev. 1.20
PSONB
V12A
V12B
Power On Reset
4ms
clr
delay
VCCI
1.2V ~ 1.8V
PWR
38ms
debounce
clr
V33
V5
VREF = 1.2V
-
UN
+
-
OV
+
-
UN
+
PWR
75ms / 600ms
delay
Bandgap
Reference
Internal
Power
VREF = 1.2V
VCCI = 3.6V
PWR
-
OV
+
-
UN
+
-
OV
+
-
UN
+
-
OV
+
clr
60us
debounce
clr
14us
debounce
OSC
R
S Q
CLK
FPOB
-
OV
IREF * 8
IREF * 8
IREF * 8
IREF * 8
+
-
+
V12A
-
+
V12A
-
+
V12A
-
+
V12A
-
+
VX
PGI
I33
I5
I12A
I12B
Weltrend Semiconductor, Inc.
Page 4
clr
73us
debounce
clr
20ms
debounce
clr
VREF = 1.2V
300ms
delay
PGO
V12A
V12A
+
-
IREF=VREF / RI
RI
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