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Astec

AS2316F Datasheet Preview

AS2316F Datasheet

Secondary Side Housekeeping Chips

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AS2316F
AS2333F
Secondary Side Housekeeping
Chips
DESCRIPTION
The AS23xx is a housekeeping circuit for monitoring the outputs of power
supplies. It directly senses all the output rails without the need for
external dividers and detects undervoltage and overvoltage. It also
provides an additional undervoltage comparator which may be
configured with any arbitrary hysteresis to sense a divided down
representation of the AC bulk voltage. The housekeeping section
provides all the features necessary to allow external caps to set the
common timing features of PC type power supplies. In addition,
negative rails may be sensed without the necessity of a VEE connection,
and negative sensing may be disabled without affecting operation of the
positive sense section. This IC is available in 16 lead packages. Outputs
include a POK (Power OK) and a fault signal.
The AS2316F includes sensing for +/- 12 V, +/- 5 V, and 3.3 V. The
AS2333F exchanges a Crow-Bar Driver output for the -5 V input.
PINOUT
VCC FAULT
+12V
+5V
+3.3V
VREF
UVB
DELAY
-5V
-12V
POK
PGCAP
GND
AC
HYST
OFF
AS2316F
AS2316F
16L PDIP
16L SOIC
ORDERING INFORMATION
Product
AS2316F
AS2316F
AS2333F
AS2333F
Temperature Range
0 to 105 °C
0 to 105 °C
0 to 105 °C
0 to 105 °C
VCC
CBD
+12V FAULT
+5V VREF
+3.3V
UVB
-12V DELAY
GND
POK
HYST PGCAP
OFF
AC
AS2333F
AS2333F
16L PDIP
16L SOIC
Package
16-Pin Plastic SOIC
16-Pin Plastic DIP
16-Pin Plastic SOIC
16-Pin Plastic DIP
Part No.
AS2316-16*D-F-000
AS2316-16*N-F-000
AS2333-16*D-F-000
AS2333-16*N-F-000




Astec

AS2316F Datasheet Preview

AS2316F Datasheet

Secondary Side Housekeeping Chips

No Preview Available !

BLOCK DIAGRAM
2
+12V
Vref
UV
nUV
VCC VCC
GND
nRESET
nOV
OV t nOVLatch
R
Latch
SQ
5 µs delay
nUVLatch
UV
+5V
AS23xxF
VCC
R
Latch
QS
FAULT
+3.3V
-5V
-12V
AC
HYST
OFF
OV
UV
nOV
OV
OV
nUV
UV
nFAULT
CBD Latch powers up
in RESET state
SQ
Latch
R
nRESET
VCC
CBD
500
nUVLatch
VCC
1µA
Vref
VCC
UVB
VREF
Disable
nOV
OV
UV
t
5 µs delay
nUV
VREF
Vref
Disable
nAC WARNING
VCC
nRESET
nOFF WARNING
HYST
nPOK
VCC
1µA
PGCAP
VCC
POK
Vref
nFAULT
VCC
Vref
1µA
DELAY
VREF
2.5V
chip bias
VREF


Part Number AS2316F
Description Secondary Side Housekeeping Chips
Maker Astec
Total Page 7 Pages
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