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AS2350D Datasheet Preview

AS2350D Datasheet

Secondary Side Housekeeping Circuit

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AS23xx
Secondary Side Housekeeping Circuit
Features
Description
Standard PC Power Good:
UV Detection on 4 rails
UV Detection of AC/Bulk supply
OV Detection on 4 rails
Open collector PG out
Pogrammable Fault output:
OV
OV plus UV
OV plus UV after startup delay
OV Crow Bar Driver
Digital ON/OFF input
2.5V Voltage Reference
Operates from 5V or 12V rail
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. The 2.5 V
series reference is available and can source up to 5 mA. This IC is available in
16 lead packages. Outputs include a POK (Power OK) and a fault signal.
The AS2333 includes sensing for ±12 V, 5 V, and 3.3V. The AS2350 exchanges
a -5 V sense capability for the 3.3 V input. The AS2316 monitors all supply
voltages, but lacks CBD (Crow-Bar Driver).
Pin Configuration Top view
VCC 1
+12V 2
+5V 3
+3.3V 4
-5V 5
-12V 6
GND 7
HYST 8
16 FAULT
15 VREF
14 UVB
13 DELAY
12 POK
11 PGCAP
10 AC
9 OFF
VCC 1
+12V 2
+5V 3
-5V 4
-12V 5
GND 6
HYST 7
OFF 8
16 CBD
15 FAULT
14 VREF
13 UVB
12 DELAY
11 POK
10 PGCAP
9 AC
VCC 1
+12V 2
+5V 3
+3.3V 4
-12V 5
GND 6
HYST 7
OFF 8
16 CBD
15 FAULT
14 VREF
13 UVB
12 DELAY
11 POK
10 PGCAP
9 AC
AS2316 SOIC VCC 1
+12V 2
+5V 3
+3.3V 4
-5V 5
-12V 6
GND 7
HYST 8
16 FAULT
15 VREF
14 UVB
13 DELAY
12 POK
11 PGCAP
10 AC
9 OFF
AS2333 SOIC
VCC 1
+12V 2
+5V 3
+3.3V 4
-12V 5
GND 6
HYST 7
OFF 8
16 CBD
15 FAULT
14 VREF
13 UVB
12 DELAY
11 POK
10 PGCAP
9 AC
AS2350 SOIC VCC 1
+12V 2
+5V 3
-5V 4
-12V 5
GND 6
HYST 7
OFF 8
16 CBD
15 FAULT
14 VREF
13 UVB
12 DELAY
11 POK
10 PGCAP
9 AC
AS2316 PDIP
AS2333 PDIP
AS2350 PDIP
Ordering Information
Package
16-Pin Plastic SOIC
16-Pin Plastic SOIC
16-Pin Plastic SOIC
16-Pin Plastic DIP
16-Pin Plastic DIP
16-Pin Plastic DIP
Temperature Range
0 to 105° C
0 to 105° C
0 to 105° C
0 to 105° C
0 to 105° C
0 to 105° C
Order Code
AS2316D
AS2333D
AS2350D
AS2316N
AS2333N
AS2350N
© ASTEC Semiconductor
91




ASTEC

AS2350D Datasheet Preview

AS2350D Datasheet

Secondary Side Housekeeping Circuit

No Preview Available !

AS23xx
Secondary Side Housekeeping Circuit
Functional Block Diagram
VR EF
+12V
nU V
UV
VC C
VC C
GND
nR ESET
nO V
R
OV
t nO VLatch
Latch
SQ
20 µs delay
nU VL atch
+5V
UV
VC C
FA ULT
R
Latch
QS
+ 3.3V
- 5V
OV
UV
O V nO V
OV
nU V
UV
nFAU L T
C BD Latch p owers up
in RESET state.
SQ
Latch
R
nR ESET
VC C
CBD
500
nUV Latch
VC C
1µA
VR EF
VC C
UVB
VR EF
Disab le
nO V
OV
UV
t
20 µs delay
nU V
- 12V
AC
VR EF
VR EF
Disab le
HYST
OFF
VC C
nAC WARNING
nR ESET
nO FF WARNING
HYST
nPO K
VC C
1µA
PGC AP
VR EF
VC C
POK
nFAU L T
VR EF
VC C
1µA
DELA Y
VR EF
2.5V
chip b ias
VR EF
ASTEC Semiconductor
92


Part Number AS2350D
Description Secondary Side Housekeeping Circuit
Maker ASTEC
Total Page 10 Pages
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