Weltrend WT7525-N140, WT7525-N160, WT7525-N161, WT7525-N180, WT7525-N181 Schematic [ru]
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偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
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WT7525
PC POWER SUPPLY SUPERVISOR
Data Sheet
REV. 0.40 Preliminary release
February 21, 2005
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
WT7525 Preliminary release
Rev. 0.40
GENERAL DESCRIPTION
The WT7525 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 / Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A, V12B and V12C input
voltage level. The Over Current Detector (OCD) monitor IS33, IS5, IS12A, IS12B and IS12C input
current sense. When OVD or UVD or OCD 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 3.5 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/Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A, V12B and V12C input
voltage.
• The Over Current Detector (OCD) monitors IS33, IS5, IS12A, IS12B and IS12C input current sense.
• Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
• 75 / 300 ms time delay for UVD.
• 300 ms time delay for PGO.
• 38 ms for PSONB input signal De– bounce.
• 73 us for PGI/OVD/UVD internal signal De– glitches.
• 1.2 ms for OCD internal signal De–glitches.
• 3.5 ms time delay for PSONB turn-off FPOB.
Weltrend Semiconductor, Inc.
Page 2
WT7525 Preliminary release
ORDERING INFORMATION
PGI
GND
FPOB
PSONB
ARINC
V12B
15 14 13 12 11 10
2 3 4 5 6 7
WT7525
-
160
PGI
GND
FPOB
PSONB
ABRIV12B
1413121110981 2 3 4 5 6
WT7525
-
140
PGI
GND
FPOB
PSONB
ARII5
V12B
15 14 13 12 11 10
2 3 4 5 6 7
WT7525
-
161
PGI
GND
FPOB
PSONB
A
RII5
V12B
V12C
17 16 15 14 13 12 11
2 3 4 5 6 7 8
WT7525
-
181
I
GND
FPOB
PSONB
ARINC
V12B
V12C
17 16 15 14 13 12 11
2 3 4 5 6 7 8
WT7525
-
180
Rev. 0.40
PIN ASSIGNMENT AND PACKAGE TYPE
16
I12
PGO
VCC
V5
V33
V12A
I33
7
I5
I12
1
9
8
PGO
VCC
V5
V33
V12A
I33
I5
I12B
I12
16
1
9
8
PGO
VCC
V5
V33
NC
V12A
I33
I12B
18
PG
I12
PACKAGE 14–Pin Plastic DIP 14–Pin Plastic SOP
WT7525–N140 WT7525–S140
Lead–Free（Pb）
PACKAGE 16–Pin Plastic DIP 16–Pin Plastic SOP
Lead–Free（Pb）
PACKAGE 18–Pin Plastic DIP 18–Pin Plastic SOP
Lead–Free（Pb）
※ The Top-Side Marking would be added a dot（●）in the right side for lead-free package.
WT7525–N140 Pb WT7525–S140 Pb
WT7525–N160
WT7525–N161
WT7525–N160 Pb
WT7525–N161 Pb
WT7525–N180
WT7525–N181
WT7525–N180 Pb
WT7525–N181 Pb
1
10
9
WT7525–S160
WT7525–S161
WT7525–S160 Pb
WT7525–S161 Pb
WT7525–S180
WT7525–S181
WT7525–S180 Pb
WT7525–S181 Pb
PGO
VCC
V5
V33
V12A
I33
I5
I12B
I12C
I12
1
9
18
10
PGO
VCC
V5
V33
NC
V12A
I33
I12B
I12C
Weltrend Semiconductor, Inc.
Page 3
WT7525 Preliminary release
Rev. 0.40
PIN DESCRIPTION
Pin Name TYPE Description
PGI I
GND P
FPOB O
PSONB I
I12A I
I12AB I
RI I
V12B I
V12C I
I12C I
I12B I
I5 I
I33 I
V12A I
V33 I
V5 I
VCC I
PGO O
Power good input signal pin
Ground
Fault protection output pin, open drain output
On/Off switch input
12VA over current protection sense input
12VA / 12VB over current protection sense input (only for 140)
Current sense adjust input
12VB over/under voltage input pin
12VC over/under voltage input pin
12VC over current protection sense input
12VB over current protection sense input
5V over current protection sense input
3.3V over current protection sense input
12VA over/under voltage input pin
3.3V over/under voltage input pin
5V over/under voltage input pin
Power supply
Power good output signal pin, open drain output
Weltrend Semiconductor, Inc.
Page 4
WT7525C-140 BLOCK DIAGRAM
BLOCK DIAGRAM
WT7525-140
VCC
WT7525 Preliminary release
Rev. 0.40
V12A
V12B
PWR
VCCI
PSONB
1.2V ~ 1.8V
V33
V5
VREF = 1.2V
38ms
debounce
-
UN
+
-
OV
+
-
UN
+
Power On Reset
3.5ms
clr
delay
75ms / 300ms
clr
delay
PWR
Bandgap
Reference
Internal
Power
VREF = 1.2V
VCCI = 3.6V
PWR
-
OV
+
-
UN
+
-
OV
+
-
UN
+
-
OV
+
clr
73us
debounce
clr
1.2ms
OSC
R
S Q
CLK
FPOB
debounce
IREF * 8
IREF * 8
IREF * 8
+
UN
-
V12A
-
+
V12A
-
+
V12A
-
+
V12A
-
+
I12AB
PGI
I33
I5
VREF = 1.2V
Weltrend Semiconductor, Inc.
clr
73us
debounce delay
VREF = 1.2V
300ms
clr
V12A
+
-
PGO
V12A
IREF=VREF / RI
RI
Page 5
WT7525C-160 BLOCK DIAGRAM
WT7525-160 / 161
VCC
WT7525 Preliminary release
Rev. 0.40
V12A
V12B
PWR
VCCI
PSONB
1.2V ~ 1.8V
V33
V5
VREF = 1.2V
38ms
debounce
-
UN
+
-
OV
+
-
UN
+
Power On Reset
3.5ms
clr
delay
75ms / 300ms
clr
delay
PWR
Bandgap
Reference
Internal
Power
VREF = 1.2V
VCCI = 3.6V
PWR
-
OV
+
-
UN
+
-
OV
+
-
UN
+
-
OV
+
clr
73us
debounce
clr
1.2ms
OSC
R
S Q
CLK
FPOB
debounce
clr
73us
debounce delay
VREF = 1.2V
IREF * 8
IREF * 8
IREF * 8
IREF * 8
+
UN
-
V12A
-
+
V12A
-
+
V12A
-
+
V12A
-
+
PGI
I33
I5
I12A
I12B
VREF = 1.2V
300ms
clr
V12A
V12A
+
-
IREF=VREF / RI
PGO
RI
Weltrend Semiconductor, Inc.
Page 6
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