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PS222S
Version Issue Date File Name Total Pages : A.001 : 2003/09/04 : SP-PS222S-A.001.doc : 13
3-Channel Secondary Monitoring IC With Over-Current Protection And an Additional 12V OCP Channel
9 7 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Fax886-3-5645626 Tel886-3-5645656
PS222S
PS222S 3-Channel Secondary Monitoring IC With Over-Current Protection And an Additional 12V OCP Channel
General Description
PS222S is specially designed for switching power supply system. Four important functions of PS222S 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 12V 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, IS12 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 another 12V 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 75mS delay for UV/OC protection 38mS PSON/ control de-bounce 73uS de-bounce for noise immunity Wide power supply range (4.2V~16V) Special care for AC power off
3-Channel Secondary Monitoring IC
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PS222S
Block Diagram
Vcc / VSx FPO/ VS12
155K
VCCI
73uS De-bounce 12 UV
SQ R 1M
9K
Vref
VCCI
delay 12 OV H : 4mS L : 4.5uS
VCCI
16K
Vref
VCC
30K 2K
VS5
58K
VCCI
38mS De-bounce
PSON/
1.25V 4.5V 90K
5 UV
13.5K Vref
VCCI
5 OV 18.5K Vref delay H : 75mS L : 4.5uS 1 0
VCCI
1.13V
VCCI
VS33
38.5K
VCCI
PGI
0.63V R QS
VCCI
3.3 UV
23.5K Vref
VCCI
1.25V 3.3 OV
28K
Vref 1M
VCCI
VCCI
PGO
Vcc OC delay 73uS De-bounce H : 300mS L : 4.5uS
ISX
Step Down to near 2.5V Iref X 8
VCCI
IS12
Step Down to near 2.5V Iref X 8
VCCI
12 OC
delay Power On Reset 5 OC H : 20mS L : 4.5uS Internal Power POR Constant Current Source Iref
RI
IS5
Step Down to near 2.5V Iref X 8
VCCI
VCCI = 4V
IS33
Step Down to near 2.5V Iref X 8
3.3 OC
Band-Gap Reference
Vref 1.25V
Clock Generator
CLK
GND
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Timing Chart
Vcc
PSON/
FPO/
PGI
VSx VS12 VS5 VS33
ISx IS12 IS5 IS33
PGO
Td1 Td2 AC turn on UVP/OVP/OCP protect
Tb1 Td3
PSON/ turn on
PSON/ turn off
PSON/ turn on
AC turn off
VPGI
1.25V 1.13V 0.63V
Td1 Td2 OVP OVP/UVP/OCP OVP
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Pin Descriptions
Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN NAME PGI GND FPO/ PSON/ IS12 RI ISx IS5 IS33 VS12 VS33 VS5 VCC / VSx PGO Ground Inverted fault protection output ,open drain output stage Remote ON/OFF control input pin 12V(1) over current protection input pin Current sense setting 12V(2) over current protection input pin 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 Power good output signal pin , open drain output stage Descriptions Power good input signal pin
Absolute Maximum Ratings
Parameter Storage Temperature Supply Voltage (Tstg) (VCC) VCC/VSx ISX, VS12, IS12 VS5, IS5 Input Voltage Range (VI) VS33, IS33 PGI PSON/ Output Voltage Range Output Current for RI (VO) (IRI) FPO/ PGO RI PSON/, PGO ESD Susceptibility* (VESD) FPOB, VS12 PGI, IS12, VS5 Others
* Human Body Model (HBM).
Rating -40 -30 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 to to to to to to to to to to > > > > +125 +90 +16.0 +16.0 +9.0 +7.0 +16.0 Vcc+0.5 +16.0 Vcc+0.5 62.5 5000 2000 3000 4000
Unit C C V V V V V V V V uA V V V V
Operating Temperature (Topr)
12.5 to
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Electrical Characteristics, Vcc=12V, Ta = Full range. (unless otherwise specified)
Power Supply Section
Parameter Supply Voltage Supply Current Power On Reset Threshold Voltage (VPOR) Power On Reset Hysteresis (VHYST) VPSON/ = 5V 3.2 -0.15 Conditions MIN 4.2 TYP 5.0 2 3.4 -0.3 MAX 16.0 3 3.6 -0.45 Unit V mA V V
Over-Voltage Section
Parameter VS33 Over-Voltage Threshold VS5 VS12 Conditions MIN 3.7 5.7 13.1 TYP 3.9 6.1 13.8 MAX 4.1 6.5 14.5 Unit V V V
Under-Voltage Section
Parameter VS33 Under-Voltage Threshold VS5 VS12 Conditions MIN 2.0 3.3 8.5 TYP 2.2 3.5 9.0 MAX 2.4 3.7 9.5 Unit V V V
Over-Current Section
Parameter VSx, ISx Offset Voltage (OCP Comparator) VS33, IS33 VS5, IS5 VS12, IS12 Constant Current Generator Voltage (VRI) Conditions MIN -5 -5 -5 -5 1.20 TYP -2 -2 -2 -2 1.25 MAX 1 1 1 1 1.30 Unit mV mV mV mV V
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Electrical Characteristics (Continued)
PSON/, Analog Input
Parameter Threshold Voltage Hysteresis (VHYST) Conditions MIN 1.16 20 TYP 1.25 50 MAX 1.33 80 Unit V mV
PGI, Analog Input
Parameter Threshold Voltage for start Td1 Threshold Voltage for start Td2 Threshold Voltage for mask OC,UV Hysteresis (VHYST)*
* All of the comparator for PGI input in block diagram.
Conditions
MIN 1.16 0.60 1.05 -20
TYP 1.25 0.63 1.13 -50
MAX 1.33 0.75 1.21 -80
Unit V V V mV
PGO, Open Drain Digital Output
Parameter Leakage Current (ILKG) Low Level Output Voltage (VOL) Conditions VPGO=5V ISINK=10mA MIN TYP MAX 5 0.3 Unit uA V
FPO/, Open Drain Digital Output
Parameter Leakage Current (ILKG) Low Level Output Voltage (VOL) Conditions VFPO/=5V ISINK=10mA MIN TYP MAX 5 0.3 Unit uA V
Switching Characteristics, Vcc=12V, Ta = Full range.
Parameter PGI to PGO Delay Time (Td1) Short Circuit Delay Time (Td2) PGO to FPO/ Delay Time (Td3) Over Current Delay Time (Td4) PSON/ De-bounce Time (Tb1) FPO/ Noise De-glitch Time (Tb2) PGO Noise De-glitch Time (Tb3) Conditions MIN 200 49 2 13 24 47 47 TYP 300 75 4 20 38 73 73 MAX 400 100 6 27 52 100 100 Unit mS mS mS mS mS uS uS
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Application
Typical 4 rails SPS (Dual 12V OCP)
S.P.S. Secondary Side
RS5 +3.3V Coil +12V(1) Coil +12V(2) Coil RS33 RS12(1) RS12(2) +5V Output +3.3V Output +12V(1) Output +12V(2) Output
DI
DV
5.6K
ROS
ROC12(2)
ROC12(1)
ROC33
ROC5
=
or
RPGO 4.7K
1 PGI 2 GND
+5VSB 1K PSON
PGO 14 VSx 13 VS5 12 VS33 11 VS12 10
0.1 uF 0.1 uF
PGO +5VSB
3 FPO/ 4 PSON/ 5 IS12 6 RI 7 ISx PS222S
IS33 9 IS5 8
Cby CPSON CPGI RPGI RI
0.1 uF 0.1 uF
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Application (Continued)
Typical 3 rails SPS (Single 12V OCP)
S.P.S. Secondary Side
RS5 +3.3V Coil +12V Coil RS33 RS12 +5V Output +3.3V Output +12V Output
ROC12
ROC33
ROC5
=
or
RPGO 4.7K
1 PGI 2 GND
+5VSB 1K PSON
PGO 14 VSx 13 VS5 12 VS33 11 VS12 10
0.1 uF 0.1 uF
PGO +5VSB
3 FPO/ 4 PSON/ 5 IS12 6 RI 7 ISx PS222S
IS33 9 IS5 8
Cby CPSON CPGI RPGI RI
0.1 uF
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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 0.002. 4. Over-Current Protection design example: V 1.25 (1) I ref = 20 A , RI = RI = = 62.5 K ( ) I RI 20 (2) RS5=0.002 , V5V = 0.002 x I +5V = ROC 5 x 8 x I ref (3) If +5V OCP trip point is 20A, ROC 5 = 0.002 x 20 = 250( ) 8 x 20
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. PS222S uses single 12VOCP protection function: As "Typical 3 rails SPS" application circuit, the pin7(ISx) must be connected a resistor(Resistance>10k) to GND or floating.
3-Channel Secondary Monitoring IC
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PS222S
Package Specification
( 14-pin DIP )
E1
E
eB
D
A2
A Seating Plane
A1
L
b1
b
e
S
0
5
10
15
20
25
mm
0.0
0.5
1.0 inch
Symbol A A1 A2 b b1 D E E1 e eB L S
Dimension in mm 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) 0.130 (TYP) (TYP) 0.200 (TYP) 0.130 (TYP) 0.500 0.500 (TYP)
Dimension in inch 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) 0.005 (TYP) (TYP) 0.008 (TYP) 0.005 (TYP) 0.020 0.020 (TYP)
NOTE
0 ~ 15
0 ~ 15
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Package Specification (Continued)
( 14-pin SOP )
E
H
h x 45
D
A
C
A1 B Seating Plane e L
0
5
10
mm
0.0
0.2
0.4
inch
Dimension in mm Symbol A A1 B C e D H E L h 8.55 5.80 3.80 0.40 0.25 0 MIN. 1.35 0.1 0.33 0.19 MAX. 1.75 0.25 0.51 0.25 1.27BSC 8.75 6.20 4.00 1.27 0.50 8
Dimension in inch MIN. 0.0532 0.0040 0.013 0.0075 0.3367 0.2284 0.1497 0.016 0.0099 0 MAX. 0.0688 0.0098 0.020 0.0098 0.3444 0.2440 0.1574 0.050 0.0196 8
NOTE
0.050BSC
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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
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