PS231S [SITI]
5-Channel Secondary Monitoring IC; 5通道二次监视IC
| 型号： | PS231S |
| 厂家： | 
SILICON TOUCH TECHNOLOGY INC. |
| 描述： | 5-Channel Secondary Monitoring IC |
| 文件： | 总11页 (文件大小：169K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PS231S
Version
: A.002
Issue Date : 2009/06/30
File Name : SP-PS231S-A.002.doc
Total Pages : 11
5-Channel Secondary Monitoring IC
新竹市科學園區展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC
.
9-7F-1, Prosperity Road I, Science Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C.
Tel
：
886-3-5645656
Fax：886-3-5645626
PS231S
PS231S
5-Channel Secondary Monitoring IC
General Description
PS231S is specially designed for switching power supply system. Four important
functions of PS231S are the followings: over-voltage protection, over-current protection,
under-voltage protection and power good signal generating.
OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors 3.3V, 5V and triple
12V to protect our power supply and PC, FPO/ goes to high when one of these supply
voltages exceeds their normal operation voltage range.
OCP (Over Current Protection) monitors IS33, IS5, IS12A, IS12B, IS12C input
current sense. An adjustable over-current condition composed of Iref and “protection
current range resistor” helps users design OCP easily.
An additional protection input pin provides the flexibility for design protection
circuit.
Power good signal generating notifies personal computer when power supply is
ready or power supply is going to shutdown, therefore it can provide a reliable power
supply environment.
Features
• Over/Under-voltage protection and lock out
• Over-current protection and lock out
• Additional protection input
• Fault protection output with open drain output stage
• Open drain power good output signal for power good input
• Built-in 300mS power good delay
• AC on 75ms delay for UV/OC protection
• 38mS PSON/ control de-bounce
• Wide power supply range (3.8V~16V)
• Special care for AC power off
5-Channel Secondary Monitoring IC
Version：A.002
Page 1
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PS231S
Block Diagram
FPO/
delay
73uS
VS
S
R
Q
155KΩ
VS12A
VS12B
VS12C
1MΩ
UV
OV
Vref
9KΩ
delay
38mS
De-bounce
Vref
H: 4mS
16KΩ
L : 4.5uS
VCC
30KΩ
VCCI
2KΩ
PSON/
Pext
1.25V
12 OV
4.5V
90KΩ
12 UV
VS5
2.6V
58KΩ
5 UV
5 OV
Vref
Vref
13.5KΩ
18.5KΩ
delay
1
0
1.13V
0.63V
1.25V
H: 75mS
L : 4.5uS
PGI
R
Q
S
VS33
38.5KΩ
3.3 UV
3.3 OV
Vref
Vref
23.5KΩ
28KΩ
VCCI
1MΩ
PGO
delay
73uS
De-bounce
VCCI
H: 300mS
L : 4.5uS
VS
IS
Step Down
to near 2.5V
OC
delay
1mS
IS12A
IS12B
IS12C
Iref X 8
12 OC
Power On
Reset
Constant Current
Source Iref
RI
POR
delay
VCCI
H: 20mS
L : 4.5uS
Step Down
to near 2.5V
Internal
Power
5 OC
VCCI = 4V
IS5
VCC
VCC
GND
Iref X 8
VCCI
Vref
Band-Gap
Reference
Clock
Generator
Step Down
to near 2.5V
CLK
3.3 OC
1.25V
IS33
Iref X 8
5-Channel Secondary Monitoring IC
Version：A.002
Page 2
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PS231S
Timing Chart
Vcc
PSON/
FPO/
PGI
VS12A IS12A
VS12B IS12B
VS12C IS12C
VS5
IS5
VS33 IS33
Pext
PGO
Td1
Tb1
Td3
Td2
AC
turn on
UVP/OVP/OCP
Pext protect
PSON/
turn on
PSON/
turn off
PSON/
turn on
AC
turn off
VPGI
1.25V
0.63V
1.13V
Td1
Td2
OVP
OVP/UVP/OCP/Pext
OVP
5-Channel Secondary Monitoring IC
Version：A.002
Page 3
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PS231S
Pin Descriptions
Pin No
PIN NAME
Descriptions
Power good input signal pin
1
PGI
2
GND
Ground
3
4
FPO/
PSON/
IS12A
RI
Inverted fault protection output ,open drain output stage
Remote ON/OFF control input pin
5
12V(1) over current protection input pin
Current sense setting
6
7
IS12B
VS12B
VS12C
IS12C
Pext
12V(2) over current protection input pin
12V(2) over/under voltage protection input pin
12V(3) over/under voltage protection input pin
12V(3) over current protection input pin
External protection detect input pin
8
9
10
11
12
13
14
15
16
17
18
IS5
5.0V over current protection input pin
3.3V over current protection input pin
12V(1) over/under voltage protection input pin
3.3V over/under voltage protection input pin
5.0V over/under voltage protection input pin
Power supply
IS33
VS12A
VS33
VS5
VCC
PGO
Power good output signal pin , open drain output stage
Absolute Maximum Ratings
Parameter
Rating
-40 to
Unit
Storage Temperature
(Tstg)
+125 °C
+90 °C
Operating Temperature (Topr)
-30 to
-0.5 to
-0.5 to
-0.5 to
-0.5 to
-0.5 to
-0.5 to
-0.5 to
-0.5 to
12.5 to
Supply Voltage
(VCC)
(VI)
VCC
+16.0
V
V
V
V
V
V
V
V
VS12(A,B,C), IS12(A,B,C)
+16.0
+9.0
VS5, IS5
VS33, IS33
PGI
Input Voltage Range
+7.0
+16.0
PSON/, Pext
FPO/
Vcc+0.5
+16.0
Output Voltage Range
Output Current for RI
(VO)
(IRI)
PGO
Vcc+0.5
RI
62.5 uA
5-Channel Secondary Monitoring IC
Version：A.002
Page 4
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PS231S
Electrical Characteristics, Vcc=12V, Ta = 25℃. (unless otherwise specified)
Power Supply Section
Parameter
Conditions
MIN
3.8
TYP
5.0
MAX
Unit
Supply Voltage
Supply Current
16.0
V
VPSON/ = 5V
4.5
3.4
5.0 mA
Power On Reset Threshold Voltage (VPOR)
Power On Reset Hysteresis (VHYST)
3.2
3.6
V
V
-0.15
-0.3
-0.45
Over-Voltage Section
Parameter
Conditions
Conditions
Conditions
MIN
TYP
MAX
Unit
VS33
3.7
5.7
3.9
6.1
4.1
6.5
V
V
V
Over-Voltage Threshold
VS5
VS12A/B/C
13.1
13.8
14.5
Under-Voltage Section
Parameter
MIN
TYP
MAX
Unit
VS33
VS5
2.0
3.3
8.5
2.2
3.5
9.0
2.4
3.7
9.5
V
V
V
Under-Voltage Threshold
VS12A/B/C
PGI, Analog Input
Parameter
MIN
TYP
MAX
Unit
Threshold Voltage for start Td1
Threshold Voltage for start Td2
Threshold Voltage for mask OC,UV
Hysteresis (VHYST)*
1.16
0.60
1.05
-20
1.25
0.63
1.13
-50
1.33
0.75
1.21
V
V
V
-80 mV
* All of the comparator for PGI input in block diagram.
5-Channel Secondary Monitoring IC
Version：A.002
Page 5
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PS231S
Electrical Characteristics (Continued)
PGO, Open Drain Digital Output
Parameter
Conditions
MIN
MIN
MIN
TYP
TYP
TYP
MAX Unit
Leakage Current (ILKG)
VPGO=5V
5
uA
V
Low Level Output Voltage (VOL)
ISINK=10mA
0.3
FPO/, Open Drain Digital Output
Parameter
Conditions
MAX Unit
Leakage Current (ILKG)
VFPO/=5V
5
uA
V
Low Level Output Voltage (VOL)
ISINK=20mA
0.4
PSON/, Analog Input
Parameter
Conditions
Conditions
MAX Unit
1.33
Threshold Voltage
Hysteresis (VHYST)
1.16
20
1.25
50
V
80 mV
External Protection Detect Section
Parameter
MIN
TYP
2.6
50
MAX Unit
Threshold(VTH)
2.5
20
2.7
V
Hysteresis (VHYST)
80 mV
Switching Characteristics, Vcc=12V, Ta = 25℃.
Parameter
Conditions
MIN
TYP
300
MAX Unit
PGI to PGO Delay Time (Td1)
Short Circuit Delay Time (Td2)
PGO to FPO/ Delay Time (Td3)
Under Voltage Delay Time (Td4)
Over Current Delay Time (Td5)
Over Voltage Delay Time (Td6)
Pext Delay Time (Td7)
200
480 mS
114 mS
49
2
75
4
6
mS
0.6
13
47
24
24
47
1
1.4 mS
27 mS
110 uS
52 mS
52 mS
110 uS
20
73
38
38
73
PSON/ De-bounce Time (Tb1)
PGO Noise De-glitch Time (Tb2)
5-Channel Secondary Monitoring IC
Version：A.002
Page 6
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PS231S
Application
Typical 5 rails SPS
S.P.S. Secondary Side
RS5
+5V Output
RS33
+3.3V Coil
+12V(1) Coil
+12V(2) Coil
+12V(3) Coil
+3.3V Output
+12V(1) Output
+12V(2) Output
+12V(3) Output
RS12(1)
RS12(2)
RS12(3)
=
or
PGO
1 PGI
PGO 18
+5VSB
2 GND
3 FPO/
4 PSON/
5 IS12A
6 RI
Vcc 17
VS5 16
+5VSB
PSON
1K
VS33 15
VS12A 14
IS33 13
IS5 12
7 IS12B
8 VS12B
9 VS12C
Pext
Pext 11
IS12C 10
PS231S
Notes:
1. Zener diode or resistor or both of them can be used in component X.
2. The bypass capacitor Cby suggests to be 0.1uF~ 10uF and layout nearby pin VCC.
3. The recommend sense values of RS12(1), RS12(2), RS5 and RS33 are ≥ 0.002Ω.
4. Over-Current Protection design example:
VRI 1.25
(1) Iref = 20μA , RI =
=
= 62.5K
Ω
( )
IRI 20μ
(2) RS5=0.002Ω ,ΔV5V = 0.002×I+5V = ROC5 ×8×Iref
0.002× 20
(3) If +5V OCP trip point is 20A, ROC5
=
= 250
Ω
( )
8× 20μ
5-Channel Secondary Monitoring IC
Version：A.002
Page 7
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PS231S
Package Specification
( 18-pin DIP )
E1
E
EB
θ°
D
A2
A1
A
Seating Plane
L
b1
b
e
0
5
10
15
20
25
mm
0.0
0.5
1.0 inch
Symbol
Dimension in mm
Min Normal Max
5.334
Dimension in inch
NOTE
Min Normal Max
A
A1
A2
b
0.210
0.381
0.015
3.175
3.302 3.429 0.125
0.130 0.135
0.060
1.524
0.457
b1
D
0.018
22.352 22.860 23.368 0.880
7.620
0.900 0.920
0.300
E
E1
e
6.223
6.350 6.477 0.245
2.540
0.250 0.255
0.100
EB
L
8.509
2.921
0
9.017 9.525 0.335
0.355 0.375
0.130 0.150
3.302 3.810
15
0.115
0
θ°
7
7
15
5-Channel Secondary Monitoring IC
Version：A.002
Page 8
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PS231S
Package Specification
( 18-pin SOP )
E
H
0.020 x 45°
D
A
A1
θ°
b
e
L
mm
0
5
10
0.0
0.2
0.4 inch
Symbol
Dimension in mm
Dimension in inch
Min Normal Max
2.642 0.093 0.104
NOTE
Min Normal Max
A
A1
b
2.362
0.102
0.305 0.004
0.012
0.406
1.270
0.016
0.050
D
E
11.354
7.391
11.760 0.447
7.595 0.291
0.463
0.299
e
H
L
10.008
0.406
0
10.643 0.394
1.270 0.016
0.419
0.050
8
θ°
8
0
5-Channel Secondary Monitoring IC
Version：A.002
Page 9
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Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
PS231S
The products listed herein are designed for ordinary electronic applications, such as
electrical appliances, audio-visual equipment, communications devices and so on.
Hence, it is advisable that the devices should not be used in medical instruments,
surgical implants, aerospace machinery, nuclear power control systems,
disaster/crime-prevention equipment and the like. Misusing those products may
directly or indirectly endanger human life, or cause injury and property loss.
Silicon Touch Technology, Inc. will not take any responsibilities regarding the
misusage of the products mentioned above. Anyone who purchases any products
described herein with the above-mentioned intention or with such misused
applications should accept full responsibility and indemnify. Silicon Touch Technology,
Inc. and its distributors and all their officers and employees shall defend jointly and
severally against any and all claims and litigation and all damages, cost and
expenses associated with such intention and manipulation.
Silicon Touch Technology, Inc. reserve the right to make changes to their products or
to discontinue any product or service without notice, and advise customers to obtain
the latest version of relevant information to verify, before placing orders, that
information being relied on is current and complete.
5-Channel Secondary Monitoring IC
Version：A.002
Page 10
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