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APW1681JC-TU Datasheet

  • APW1681JC-TU

  • 3-Channel Power Supply Supervisor

  • 7頁

  • ANPEC

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APW1681
3-Channel Power Supply Supervisor
Features
Over Voltage Protection and Lock Out for
!
3.3 V, 5 V, and 12 V
Under Voltage Protection and Lock Out for
!
3.3 V and 5 V
Fault Protection Output with Open Drain
!
Output Stage
Open Drain Power Good Output Signal for
!
Power Good Input, 3.3 V and 5 V
General Description
The APW1681 is designed to minimize the exter-
nal components of personal-computer switching
power supply systems. It provides protection
circuits, power good indicator, fault protection out-
put
FPO
and
PSON
control.
OVP (over voltage protection) monitors 3.3V, 5 V,
and 12 V (12 V OV detects via V
CC
terminal). UVP
(under voltage protection) monitors 3.3V and 5V.
When an OV or UV condition is detected, the PGO
(power good output) is set to low and
FPO
is latched
to high.
PSON
from low to high resets the protec-
tion latch. There is a 2.36ms turn-off delay
from
PSON
to
FPO
. There is no delay during turn
on.
Power good feature monitors PGI, 3.3V and 5V un-
der voltages, and issues a power good signal when
they are ready.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
300 ms Power Good Delay
2.36 ms
PSON
Control to
FPO
Turn-Off
Delay
38 ms
PSON
Control Debounce
鈥?/div>
75 ms Delay for 3.3V and 5V Under Voltage
!
Protection
鈥?/div>
鈥?/div>
鈥?/div>
73
碌s
Width Noise Deglitches
Wide Power Supply Voltage Range
from 4 V to 15 V
Intelligent Under Voltage Protection to Pre
vent Instantaneously AC Power Black Out
Pin Description
Applications
鈥?/div>
PC Switching Power Supply
PGI
GND
FPO
PSON
1
2
3
4
8
7
6
5
PGO
VCC
VS5
VS33
Ordering Information
APW1681
Handling Code
Temp. Range
Package Code
Package Code
J : DIP - 8
Temp. Range
C : 0 to 70
擄
C
Handling Code
TU : Tube
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
錚?/div>
ANPEC Electronics Corp.
Rev. A.2 - Feb., 2001
1
www.anpec.com.tw

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