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偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
`

WT7510
PC POWER SUPPLY SUPERVISOR

Data Sheet
REV. 2.31
April 04, 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

WT7510
Rev. 2.31

GENERAL DESCRIPTION
The WT7510 provides protection circuits, power good output (PGO), fault protection latch (FPL_N),
and a protection detector function (PDON_N) control. It can minimize external components of switching
power supply systems in personal computer.
The Over Voltage Detector (OVD) monitors 3.3V, 5V, 12V input voltage level. The Under Voltage
Detector (UVD) monitors 3.3V, 5V input voltage level. When OVD or UVD detect the fault voltage level,
the FPL_N is latched HIGH and PGO go low. The latch can be reset by PDON_N goo HIGH. There is
2.4 ms delay time for PDON_N turn off FPL_N.
When OVD and UVD detect the right voltage level, the power good output (PGO) will be issue.

FEATURES









The Over Voltage Detector (OVD) monitors 3.3V, 5V, 12V input voltage level.
The Under Voltage Detector (UVD) monitors 3.3V, 5V input voltage level.
Both of the power good output (PGO) and fault protection latch (FPL_N) are Open Drain Output.
75 ms time delay for UVD.
300 ms time delay for PGO.
38 ms for PDON_N input signal De–bounce.
73 us for internal signal De–glitches.
2.4 ms time delay for PDON_N turn-off FPL_N.

PIN ASSIGNMENT AND PACKAGE TYPE

PGI

1

8

PGO

GND

2

7

VCC

FPL_N

3

6

V5

PDON_N

4

5

V33

ORDERING INFORMATION
PACKAGE

8–Pin Plastic DIP
8–Pin Plastic SOP
WT7510–N080WT–12
WT7510–S080WT–12
Lead–Free(
(Pb)

WT7510–NN080WT–12
WT7510–SN080WT–12
※ The Top-Side Marking would be added a dot(●)
(●)in
(●) the right side for lead-free package.
PIN DESCRIPTION
Pin No. Pin Name TYPE
Description
1
PGI
I
power good input pin
2
GND
P Ground
3
FPL_N
O fault protection latch output pin(open drain output)
4
PDON_N
I
protection detector function ON/OFF control input pin
5
V33
I
3.3V input pin
6
V5
I
5V input pin
7
VCC
I
Supply voltage / 12V input pin
8
PGO
O power good output pin(open drain output)

Weltrend Semiconductor, Inc.
Page 2

WT7510
Rev. 2.31

BLOCK DIAGRAM

WT751201A_WT7510 BLOCK DIAGRAM
VCC

Power On Reset
150uA

VCC Low Voltage

3.6V

POR

Clock
Generator

LVRST

CLK
PWR

CLK PWR

CLK

PWR

RST
38ms
debounce

PDON_N

V33

- UN

CLK

- OV

clr

+

+

V5

clr

2.4ms
delay

PWR
75 ms
delay

- UN

CLK RST

- OV

73us
debounce

+

R

+

S

FPL_N
Q

VCC

- OV

CLK RST

+

VCC

CLK

PGO

PGI

73us
debounce

- UN

+

clr

300ms
delay

1.2V

RECOMMENDED OPERATING CONDITIONS
Parameter
Supply voltage, VCC
Input voltage
Output voltage
Operating temperature
Output sink current

Conditions

Min.
4

PDON_N, V5, V33, PGI
FPL_N
PGO
-40
FPL_N
PGO

Supply voltage rising time

1

Weltrend Semiconductor, Inc.
Page 3

Typ.
12

Max.
15
7
15
7
125
30
10

Unit
V
V
V
V

mA
mA
ms

WT7510
Rev. 2.31

ELECTRICAL CHARACTERISTICS, at Ta=25°°C and VCC=5V.
Over Voltage Detection
Parameter
Over voltage threshold

Condition

V33
V5
Vcc / V12
ILEAKAGE Leakage current (FPL_N)
VOL Low level output voltage (FPL_N)

Min.
3.7
5.7
12.8

Typ.
3.9
6.1
13.4
5
0.3
0.7

Max.
4.1
6.5
13.9

Unit
V
V
V
uA
V

Min.
2.55
4.1
1.16

Typ.
2.69
4.3
1.20
5
0.4

Max.
2.83
4.47
1.24

Unit
V
V
V
uA
V

Min.

Typ.
150

Max.

Unit
uA
V
V

V(FPL_N) = 5V
Isink 10mA
Isink 30mA

PGI and PGO
Parameter
Under voltage threshold

Condition
V33
V5

Input threshold voltage(PGI)
ILEAKAGE Leakage current(PGO)
VOL
Low level output voltage(PGO)

PGO = 5V

PDON_N
Parameter
Input pull-up current
High-level input voltage
Low-level input voltage

Condition
PDON_N= 0V

2.0
0.8

TOTAL DEVICE
Parameter
Icc Supply current
Vcc low voltage

Condition
PDON _N= 5V

Min.

Typ.

Max.
1

3

SWITCHING CHARACTERISTICS, Vcc=5V
Parameter
Condition
Min.
Typ.
Max.
tdb1
De-bounce time (PDON_N)
32
38
61
tdleay1 Delay time (PGI to PGO)
200
300
490
tdb2
De-bounce time (PDON_N)
32
38
61
tg
De-glitch time
63
73
120
tdelay2 PDON_N to FPL_N delay time
tdb2+2.0 tdb2+2.4 tdb2+3.8
tdelay3 Internal UVD delay time
FPL_N go low &
65
75
122
every time PGI > 1.2V

Weltrend Semiconductor, Inc.
Page 4

Unit
mA
V

Unit
mS
mS
mS
uS
mS
mS

WT7510
Rev. 2.31

APPLICATION CIRCUIT

+5V

+5VSB

0.01uF
PGI

470
PDON_N

1

PGI

PGO

8

2

GND

VCC

7

3

FPL_N

V5

6

4

PDON_N

V33

5

0.01uF

Weltrend Semiconductor, Inc.
Page 5

+12V
+5V
+3.3V

+5VSB

WT7510
Rev. 2.31

APPLICATION TIMMING
1.) PGI (UNDER_VOLTAGE):


PDON_N
tdelay2
FPL_N

tdb1

tdelay1+tg

PGO

tdb2

PGI

PDON_N
tdelay2
FPL_N

tdb1

tdelay1+tg

tdelay1+tg

PGO

tdb2

PGI

Weltrend Semiconductor, Inc.
Page 6

WT7510
Rev. 2.31

2.) V33, V5 (UNDER_VOLTAGE):


PDON_N
tdelay2
FPL_N

tdb1

tdelay1+tg

PGO

tdb2

V33 / V5

tdelay3=75mS
PDON_N
tdelay2

tdelay3+t
FPL_N

g

tdb1

tdb1

PGO

tdelay1+tg
tdb2

PGI
V33 / V5

Weltrend Semiconductor, Inc.
Page 7

WT7510
Rev. 2.31

3.) V33, V5, V12 (OVER_VOLTAGE):


PDON_N
tdelay2
FPL_N

tdb1

tdelay1+tg

PGO

tdb2

V33/V5/V12

PDON_N
tg
FPL_N

tdb1

tdelay2
tdb1

PGO

tdelay1+tg
tdb2

V33/V5/V12

Weltrend Semiconductor, Inc.
Page 8

WT7510
Rev. 2.31

MECHANICAL INFORMATION
PLASTIC DUAL–IN–LINE PACKAGE

NOTE 1:All linear dimensions are in inches(millimeters).
NOTE 2:This drawing is subject to change without notice.
NOTE 3:Falls within JEDEC MS–001

Weltrend Semiconductor, Inc.
Page 9

WT7510
Rev. 2.31

PLASTIC SMALL–OUTLINE PACKAGE

NOTE 1:All linear dimensions are in inches(millimeters).
NOTE 2:This drawing is subject to change without notice.
NOTE 3:Falls within JEDEC MS–012

Weltrend Semiconductor, Inc.
Page 10


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