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PDF AS2333 Data sheet ( Hoja de datos )
| Número de pieza | AS2333 | |
| Descripción | (AS23xx) Secondary Side Housekeeping Circuit | |
| Fabricantes | Astec | |
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AS23xx
SEMICONDUCTOR Secondary Side Housekeeping Circuit
Features
• Standard PC Power Good:
UV Detection on 4 rails
UV Detection of AC/Bulk supply
OV Detection on 4 rails
Open collector PG out
• Programmable Fault output:
OV
OV plus UV
OV plus UV after start-up delay
• OV Crow-Bar Driver
• Digital ON/OFF input
• 2.5 V Voltage Reference
• Operates from 5 V or 12 V rail
Pin Configuration — Top view
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 exter-
nal 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 refer-
ence 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 3.3 V. The AS2350
exchanges a –5 V sense capability for the 3.3 V input. The AS2316 mon-
itors all supply voltages, but lacks CBD (Crow-Bar Driver).
VCC 1
+12V 2
+5V 3
+3.3V 4
16 FAULT
15 VREF
14 UVB
13 DELAY
VCC 1
+12V 2
+5V 3
+3.3V 4
16 CBD
15 FAULT
14 VREF
13 UVB
VCC
+12V
1
2
+5V 3
+3.3V 4
16 CBD
15 FAULT
14 VREF
13 UVB
–5V 5
12 POK
–12V 5
12 DELAY
–12V 5
12 DELAY
–12V 6
11 PGCAP
GND 6
11 POK
GND 6
11 POK
GND 7
10 AC
HYST 7
10 PGCAP
HYST 7
10 PGCAP
HYST 8
9 OFF
AS2316 SOIC
VCC 1
+12V 2
+5V 3
+3.3V 4
OFF 8
9 AC
16 FAULT
15 VREF
14 UVB
AS2333 SOIC
VCC 1
+12V 2
+5V 3
13 DELAY
+3.3V 4
OFF 8
9 AC
16 CBD
15 FAULT
AS2350 SOIC
VCC 1
+12V 2
14 VREF
13 UVB
+5V 3
–5V 4
16 CBD
15 FAULT
14 VREF
13 UVB
–5V 5
12 POK
–12V 5
12 DELAY
–12V 5
12 DELAY
–12V 6
11 PGCAP
GND 6
11 POK
GND 6
11 POK
GND 7
10 AC
HYST 7
10 PGCAP
HYST 7
10 PGCAP
HYST 8
9 OFF
AS2316 PDIP
GND 8
9 AC
AS2333 PDIP
OFF 8
9 AC
AS2350 PDIP
Ordering Information
Model
AS2316D, AS2316N
AS2333D, AS2333N
AS2350D, AS2350N
Sense Voltage
±12/±5/+3.3
±12/+5/+3.3
±12/±5
Crow-Bar Driver
No
Yes
Yes
www.ptcc.com.tw
95
1 page  
Secondary Side Housekeeping Circuit
AS23xx
Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply Voltage
Continuous Power Dissipation at 25°C
Junction Temperature
Operating Temperature Range
VCC 20 V
PD
1000
mW
TJ 150 °C
?
0 to 105
°C
Storage Temperature Range
TSTG
–65 to 150
°C
Lead Temperature, Soldering 10 Seconds
TL 300 °C
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions above indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Recommended Conditions
Parameter
Symbol Rating
Supply Voltage
VCC 5 – 12
Typical Thermal Resistance
Unit Package
θJA
θJC Typical Derating
V 16L SOIC 65°C/W
45°C/W 10.0 mW/°C
16L PDIP 80°C/W
35°C/W 12.5 mW/°C
Electrical Characteristics
Electrical Characteristics are guaranteed over full junction temperature range (0 to 105°C). Ambient temperature must be derated
based on power dissipation and package thermal characteristics. Unless otherwise specified, the conditions of test are VCC = 12
V; +3.3 V = 3.3 V; +5 V = 5 V; +12 V = 12 V; –12 V = –12 V; –5 V = –5 V; OFF = low.
Parameter
Symbol Test Condition
Min. Typ. Max. Unit
Bias
Supply Current
Min. VCC for operation
Undervoltage, Overvoltage
+3.3 V (Not available on AS2350)
ICC
VCC Min.
no faults
VREF = 2.5 V, no faults
8 12 mA
4.2 V
+3.3 V Undervoltage
UV
2.87 2.95 3.03
V
+3.3 V Overvoltage
OV
3.76 3.86 3.96
V
+3.3 V Input Current
+5 V
IB
V+3.3 = +3.3 V, V+5 = +5.0 V
–0.1 0
0.1 mA
+5 V Undervoltage
UV
4.40 4.50 4.60
V
+5 V Overvoltage
OV
5.74 5.89 6.04
V
+5 V Input Current
+12 V
IB V+5 = +5.0 V, V+3.3 = +3.3 V
1.6 2.5 mA
+12 V Undervoltage
UV
10.25 10.50 10.60
V
+12 V Overvoltage
OV
14.53 14.90 15.27
V
+12 V Input Current
IB V+12 = +12.0 V
0.8 1.5 mA
www.ptcc.com.tw
99
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AS2333.PDF ] | |
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