Weltrend WT7515-N140WT, WT7515-S140WT Schematic [ru]
偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
`
WT7515
PC POWER SUPPLY SUPERVISOR
Data Sheet
REV. 1.50
May 07, 2004
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
WT7515
PGI
GND
FPOB
PSONB
IS12
RI
NC
2 3 4 5 6
WT7515
–
140WT
PGI
GND
FPOB
PSONB
IS12
RI
IS5
2 3 4 5 6
WT7515
–
141WT
ORDERING INFORMATION
Rev. 1.50
GENERAL DESCRIPTION
The WT7515 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 3.3V, 5V, 12V input voltage level. The
Over Current Detector (OCD) monitor IS33, IS5, IS12 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 2.4 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 / Under Voltage Detector (OVD / UVD) monitors 3.3V, 5V, 12V input voltage level.
• The Over Current Detector (OCD) monitors IS33, IS5, IS12 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 internal signal De–glitches.
• 2.4 ms time delay for PSONB turn-off FPOB.
PIN ASSIGNMENT AND PACKAGE TYPE
Pin assignment
PACKAGE 14–Pin Plastic DIP 14–Pin Plastic SOP
Lead–Free（Pb）
※ The Top-Side Marking would been added a dot（●）in the right side for lead-free package.
14
1
13
12
11
10
9
8
7
PGO
VCC
V5
V33
V12
IS33
IS5
WT7515–N140WT
WT7515–N141WT
WT7515–N140WT Pb
WT7515–N141WT Pb
WT7515–S140WT
WT7515–S141WT
WT7515–S140WT Pb
WT7515–S141WT Pb
14
1
13
12
11
10
9
8
7
PGO
VCC
V5
V33
VCC2
V12
IS33
Weltrend Semiconductor, Inc.
Page 2
WT7515
Rev. 1.50
PIN DESCRIPTION
Pin Name TYPE Description
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
IS12 I 12V over current protection sense input
RI I Current sense adjust input
VCC2 I Current sense power supply
IS5 I 5V over current protection sense input
IS33 I 3.3V over current protection sense input
V12 I 12V over/under voltage input pin
V33 I 3.3V over/under voltage input pin
V5 I 5V over/under voltage input pin
VCC I Power supply
PGO O Power good output signal pin, open drain output
BLOCK DIAGRAM
PSONB
V33
V5
V12
PGI
IS33
IS5
IS12
VCCI
VCC
VREF
-
UN
+
-
OV
+
-
UN
+
-
OV
+
-
UN
+
-
OV
+
-
UN
+
VCC2
-
OI
+
IREF * 8
VCC2
-
OI
+
IREF * 8
VCC2
-
OI
+
IREF * 8
PWR
38ms
debounce
Power On Reset
RST
2.4ms
clr
delay
75ms
clr
delay
RST
73us
debounce
PWR
clr
RST
73us
debounce
300ms
delay
Reference
R
S Q
VREF
Bandgap
Internal
Power
PWR
OSC
+
-
VREF = 1.2V
VCCI = 3.6V
CLK
FPOB
PGO
V12
V12
IREF
RI
Weltrend Semiconductor, Inc.
Page 3
WT7515
Rev. 1.50
ABSOLUTE MAXIMUM RATINGS
Parameter Min. Max. Unit
Supply voltage, VCC, VCC2, V12 –0.3 16 V
PSONB, V5, V33, PGI, –0.3 7 V Input voltage
I12, I5, I33 –0.3 V12+0.3 V
Output voltage FPOB, PGO –0.3 7 V
Operating temperature -40 125 ℃
Storage temperature -55 150 ℃
*Note: Stresses above those listed may cause permanent damage to the devices
RECOMMENDED OPERATING CONDITIONS
Parameter Conditions Min. Typ. Max. Unit
Supply voltage, VCC 4 12
Supply voltage, VCC2 9.5 12 15
PSONB, V5, V33, PGI 7 V Input voltage
V12 15 V
Output voltage FPOB, PGO 7 V
Output sink current
Supply voltage rising time 1 ms
Output current for RI RI 10 65 uA
FPOB 30 mA
PGO 10 mA
15 V
ELECTRICAL CHARACTERISTICS, at Ta=25°C and V
Over Voltage Detection
Parameter Condition Min. Typ. Max. Unit
Over voltage threshold
I
LEAKAGE
PGI and PGO
Input threshold voltage(PGI) 1.16 1.20 1.24 V
I
LEAKAGE
VOL Low level output voltage(PGO) I
Input offset voltage of OCP comparators -5 5 mV
PSONB
Input pull-up current PSONB= 0V 150 uA
High-level input voltage 2.0 V
Low-level input voltage 0.8 V
Leakage current (FPOB) V(FPOB) = 5V 5 uA
Parameter Condition Min. Typ. Max. Unit
Under voltage threshold
Leakage current(PGO) PGO = 5V 5 uA
Parameter Condition Min. Typ. Max. Unit
V33 3.7 3.9 4.1 V
V5 5.7 6.1 6.5 V
V12 13.3 13.8 14.3 V
I
=10mA 0.3 VOL Low level output voltage (FPOB)
sink
I
=30mA 0.7
sink
V33 2.55 2.69 2.83 V
V5 4.1 4.3 4.47 V
V12 9.5 10 10.5 V
=10mA 0.4 V
sink
=5V.
CC
V
Weltrend Semiconductor, Inc.
Page 4
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