PS236 [SITI]
3-Channel Secondary Monitoring IC With an Additional OCP Channel; 3通道二级监控IC与另外OCP通道
| 型号： | PS236 |
| 厂家： | 
SILICON TOUCH TECHNOLOGY INC. |
| 描述： | 3-Channel Secondary Monitoring IC With an Additional OCP Channel |
| 文件： | 总13页 (文件大小：135K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PS236
Version
: A.001
Issue Date : 2005/11/16
File Name : SP-PS236-A.001.doc
Total Pages : 13
3-Channel Secondary Monitoring IC
With an Additional OCP Channel
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
PS236
3-Channel Secondary Monitoring IC
With an Additional OCP Channel
General Description
PS236 is specially designed for switching power supply system. Four important
functions of PS236 are the following: 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 13V to
protect our power supply. FPO/ goes to high when one of these supply voltages
exceeds their normal operation voltage range.
OCP (Over Current Protection) monitors IS33, IS5, IS13 input current sense.
Composed of “Iref“ and “protection current range resistor”, an adjustable over-current
condition helps users design OCP easily.
An additional OCP channel helps users monitor additional VSX rail output current.
Power good signal generating can notify 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
• 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 3mS delay for UV/OC protection
• 17uS de-bounce for noise immunity
• Wide power supply range (4.2V~18V)
• Special care for AC power off
3-Channel Secondary Monitoring IC
Version：A.001
-1-
Block Diagram
Vcc / VSx
VS13
159KΩ
VCCI
VCCI
13 UV
13 OV
Vref
Vref
6.5KΩ
FPO/
17uS
De-bounce
S
R
Q
14.5KΩ
1MΩ
POR
VS5
64.5KΩ
VCCI
VCCI
5 UV
5 OV
Vref
Vref
6KΩ
VCCI
VCCI
VCCI
19.5KΩ
delay
1
0
1.13V
0.63V
H: 3mS
L : 4.5uS
PGI
VS33
R
S
51KΩ
VCCI
VCCI
Q
3.3 UV
3.3 OV
1.25V
Vref
Vref
10KΩ
29KΩ
VCCI
1MΩ
PGO
VCCI
VCCI
VCCI
VCCI
delay
Vcc OC
13 OC
5 OC
73uS
De-bounce
Step Down
to near 2.5V
ISX
IS13
IS5
H: 300mS
L : 4.5uS
Iref X 8
Step Down
to near 2.5V
delay
Iref X 8
Power On
Reset
Constant Current
Source Iref
POR
RI
H: 2.5mS
L : 4.5uS
Step Down
to near 2.5V
Internal
Power
VCCI = 4V
Iref X 8
3.3 OC
Vref
Step Down
to near 2.5V
Band-Gap
Reference
Clock
Generator
CLK
GND
IS33
1.25V
Iref X 8
3-Channel Secondary Monitoring IC
Version：A.001
-2-
Timing Chart
Vcc
FPO/
PGI
VSx ISx
VS13 IS13
VS5 IS5
VS33 IS33
PGO
Td1
Td2
AC
turn on
UVP/OVP/OCP
protect
UVP/OCP
protect
AC
turn off
VPGI
1.25V
0.63V
1.13V
Td1
Td2
OVP/UVP/OCP
3-Channel Secondary Monitoring IC
Version：A.001
-3-
Pin Descriptions
Pin No
PIN NAME
Descriptions
Power good input signal pin
1
2
PGI
GND
FPO/
N/C
Ground
3
Inverted fault protection output ,open drain output stage
N/C
4
5
IS13
RI
13V over current protection input pin
Current sense setting
6
7
ISx
VSX over current protection input pin
5.0V over current protection input pin
3.3V over current protection input pin
13V over/under voltage protection input pin
3.3V over/under voltage protection input pin
5.0V over/under voltage protection input pin
Power supply
8
IS5
9
IS33
VS13
VS33
VS5
10
11
12
13
14
VCC / VSx
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
12.5 to
Supply Voltage
(VCC)
(VI)
VCC/VSx
ISX, VS13, IS13
VS5, IS5
VS33, IS33
PGI
+18.0
V
V
V
V
V
V
V
+18.0
+9.0
Input Voltage Range
+7.0
+16.0
+16.0
Vcc+0.5
FPO/
Output Voltage Range (VO)
Output Current for RI
PGO
(IRI)
RI
62.5 uA
3-Channel Secondary Monitoring IC
Version：A.001
-4-
Electrical Characteristics, Vcc=12V, Ta = 25˚C range. (unless otherwise specified)
Power Supply Section
Parameter
Conditions
MIN
4.2
TYP
5.0
MAX
Unit
Supply Voltage
18.0
3
V
mA
V
Supply Current
VPSON/ = 5V
2
3.4
Power On Reset Threshold Voltage (VPOR)
Power On Reset Hysteresis (VHYST)
3.2
3.6
-0.15
-0.3
-0.45
V
Over-Voltage Section
Parameter
Conditions
Conditions
Conditions
MIN
TYP
MAX
Unit
VS33
3.8
5.5
3.9
5.8
4.2
6.0
V
V
V
Over-Voltage Threshold
VS5
VS13
15.0
15.5
16.0
Under-Voltage Section
Parameter
MIN
TYP
MAX Unit
VS33
VS5
2.7
4.1
2.9
4.4
3.0
4.6
V
V
V
Under-Voltage Threshold
VS13
10.1
10.8
11.0
Over-Current Section
Parameter
MIN
TYP
MAX
Unit
VSx, Isx
VS33, IS33
VS5, IS5
-5
-5
-2
-2
1
3
mV
mV
mV
mV
V
Offset Voltage
(OCP Comparator)
-5
-2
3
VS13, IS13
-5
-2
1
Constant Current Generator Voltage (VRI)
1.20
1.25
1.30
3-Channel Secondary Monitoring IC
Version：A.001
-5-
Electrical Characteristics (Continued)
PGI, Analog Input
Parameter
Conditions
MIN
TYP
1.25
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
1.33
0.75
1.21
V
V
V
0.63
1.13
-50
-80 mV
* All of the comparator for PGI input in block diagram.
PGO, Open Drain Digital Output
Parameter
Leakage Current (ILKG)
Conditions
MIN
MIN
MIN
TYP
MAX Unit
VPGO=5V
5
uA
V
Low Level Output Voltage (VOL)
ISINK=5mA
0.4
FPO/, Open Drain Digital Output
Parameter
Conditions
TYP
MAX Unit
Leakage Current (ILKG)
VFPO/=5V
5
uA
V
Low Level Output Voltage (VOL)
ISINK=5mA
0.3
Switching Characteristics, Vcc=12V, Ta = 25˚C.
Parameter
Conditions
TYP
MAX Unit
PGI to PGO Delay Time (Td1)
Short Circuit Delay Time (Td2)
Over Current Delay Time (Td3)
FPO/ Noise De-glitch Time (Tb1)
PGO Noise De-glitch Time (Tb2)
200
2
300
400 mS
3
2.5
17
4
mS
1.6
9
3.2 mS
26 uS
47
73
100 uS
3-Channel Secondary Monitoring IC
Version：A.001
-6-
Application
Typical 4 rails SPS
S.P.S. Secondary Side
RS5
+5V Output
+3.3V Output
+13V Output
+12V Output
RS33
+3.3V Coil
+13V Coil
+12V Coil
RS12(1)
RS12(2)
=
or
PGO
1 PGI
2 GND
3 FPO/
4 N/C
5 IS13
6 RI
PGO 14
+5VSB
VSx 13
VS5 12
VS33 11
VS13 10
IS33 9
IS5 8
+5VSB
1K
7 ISx
Cby
PS236
0.1 uF
0.1 uF
3-Channel Secondary Monitoring IC
Version：A.001
-7-
Application (Continued)
Typical 3 rails SPS
S.P.S. Secondary Side
RS5
+5V Output
+3.3V Output
+13V Output
RS33
RS12
+3.3V Coil
+13V Coil
=
or
PGO
1 PGI
2 GND
3 FPO/
4 N/C
5 IS13
6 RI
PGO 14
+5VSB
VSx 13
VS5 12
VS33 11
VS13 10
IS33 9
IS5 8
+5VSB
1K
7 ISx
Cby
PS236
0.1 uF
3-Channel Secondary Monitoring IC
Version：A.001
-8-
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. GND path:
(1) The GND path width is wider as far as it could.
(2) The better grounding ability has better performance at surge test.
6. PS236 uses single 13V OCP protection function:
As “Typical 3 rails SPS” application circuit, the pin7(ISx) must be connected a
resistor(Resistance>1kΩ) to VCC/VSX OR floating.
3-Channel Secondary Monitoring IC
Version：A.001
-9-
Package Specification
( 14-pin DIP )
E1
E
eB
θ°
D
A2
A1
A
L
Seating Plane
b1
b
e
S
0
5
10
15
20
25
mm
0.0
0.5
1.0 inch
Symbol
Dimension in mm
Dimension in inch
NOTE
A
A1
A2
b
5.330
0.380
3.300
1.520
0.460
19.400
7.620
6.350
2.540
9.000
9.020
1.800
(MAX)
(MIN)
0.210
0.015
0.130
0.060
0.018
0.764
0.300
0.250
0.100
0.355
0.130
0.074
(MAX)
(MIN)
± 0.130
(TYP)
± 0.005
(TYP)
b1
D
(TYP)
(TYP)
± 0.200
(TYP)
± 0.008
(TYP)
E
E1
e
± 0.130
(TYP)
± 0.005
(TYP)
eB
L
± 0.500
± 0.500
(TYP)
± 0.020
± 0.020
(TYP)
S
θ°
0° ~ 15°
0° ~15°
3-Channel Secondary Monitoring IC
Version：A.001
-10-
Package Specification (Continued)
( 14-pin SOP )
E
H
h x 45°
D
A
C
A1
θ
B
e
L
Seating Plane
mm
0
5
10
0.0
0.2
0.4 inch
Dimension in mm
Dimension in inch
NOTE
Symbol
MIN.
1.35
MAX.
1.75
0.25
0.51
0.25
MIN.
MAX.
0.0688
0.0098
0.020
A
A1
B
C
e
0.0532
0.0040
0.013
0.1
0.33
0.19
0.0075
0.0098
1.27BSC
0.050BSC
D
H
E
L
8.55
5.80
3.80
0.40
0.25
0°
8.75
6.20
4.00
1.27
0.50
8°
0.3367
0.2284
0.1497
0.016
0.0099
0°
0.3444
0.2440
0.1574
0.050
0.0196
8°
h
θ
3-Channel Secondary Monitoring IC
Version：A.001
-11-
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.
3-Channel Secondary Monitoring IC
Version：A.001
-12-
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