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PS223
Version Issue Date File Name Total Pages : A.006 : 2009/05/19 : SP-PS223-A.006.doc : 11
4-Channel Secondary Monitoring IC With 4-Channel OCP And an Additional OTP
9 7 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel886-3-5645656 Fax886-3-5645626
SILICON TOUCH TECHNOLOGY INC.
PS223
PS223 4-Channel Secondary Monitoring IC With 4-Channel OCP And an Additional OTP
General Description
PS223 is specially designed for switching power supply system. Four important functions of PS223 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 double 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 input current sense. An adjustable over-current condition composed of Iref and "protection current range resistor" helps users design OCP easily. An additional OTP channel helps users monitor if there have any over temperature occur. 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 Over-temperature protection 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 Special care for AC power off
4-Channel Secondary Monitoring IC -1-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Block Diagram
VS12A
171K 12 UV 9.4K Vref 12 OV 18K Vref 38mS De-bounce delay H : 4mS L : 4.5uS 171K 12 UV 9.4K Vref 12 OV 18K Vref 20K
FPO/
73uS De-bounce SQ R 1M
VS12B
Vcc
PSON/
OTP
2.5V
VS5
37.7K 5 UV 8.3K Vref 5 OV 12K Vref H : 75mS L : 4.5uS delay 1 0 1.13V
PGI
0.63V R QS
VS33
16.3K 3.3 UV 8.9K Vref 3.3 OV 12K Vref
1.25V
VCCI
1M
PGO
delay 12 OC 73uS De-bounce H : 300mS L : 4.5uS
IS12A
Iref X 8
12 OC
IS12B
Iref X 8
delay
H : 20mS L : 4.5uS Power On Reset POR Constant Current Source Iref
RI
5 OC
IS5
Iref X 8
Internal Power
VCCI = 4V
3.3 OC
IS33
Iref X 8
Band-Gap Reference
Vref
Clock Generator
CLK
GND
4-Channel Secondary Monitoring IC -2-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Timing Chart
Vcc
PSON/
FPO/
PGI
VS12A VS12B VS5 VS33
IS12A IS12B 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
4-Channel Secondary Monitoring IC -3-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Pin Descriptions
Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME PGI GND FPO/ PSON/ IS12A RI IS12B VS12B OTP IS5 IS33 VS12A VS33 VS5 VCC PGO Descriptions Power good input signal pin 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 12V(2) over/under voltage protection input pin Over temperature 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
Absolute Maximum Ratings
Parameter Storage Temperature Supply Voltage (Tstg) (VCC) VCC VS12A/B, IS12A/B VS5, IS5 Input Voltage Range (VI) VS33, IS33 PGI PSON/, OTP Output Voltage Range (VO) FPO/ PGO -40 -30 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 Operating Temperature (Topr) Rating 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 Unit C C V V V V V V V V
4-Channel Secondary Monitoring IC -4-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Electrical Characteristics, Vcc=12V, Ta = 25C. (unless otherwise specified)
Power Supply Section
Parameter Supply Voltage Supply Current Power On Reset Threshold Voltage (VPOR) Power On Reset Hysteresis (VHYST) VPSON/ = 5V Conditions MIN 4.2 TYP 5.0 4.5 3.6 0.6 MAX 16.0 5.0 Unit V mA V V
Over-Voltage Section
Parameter VS33 Over-Voltage Threshold VS5 VS12A/B 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 VS12A/B 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 Constant Current Generator Voltage (VRI) Constant Current (IRI) Conditions MIN 1.20 12.5 TYP 1.25 20.0 MAX 1.30 62.5 Unit V uA
Over-Temperature Section
Parameter Over-Temperature Threshold(VTH) Hysteresis (VHYST) Conditions MIN 2.4 TYP 2.5 -0.26 MAX 2.6 Unit V V
4-Channel Secondary Monitoring IC -5-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Electrical Characteristics (Continued)
PSON/, Analog Input
Parameter Threshold Voltage ( High ) Threshold Voltage ( Low ) Conditions MIN 1.40 0.75 TYP 1.50 0.85 MAX 1.60 0.95 Unit V V
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
TYP 1.25 0.63 1.13 50
MAX 1.33 0.75 1.21
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 = 25C.
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 480 114 6 27 61 110 110 Unit mS mS mS mS mS uS uS
4-Channel Secondary Monitoring IC -6-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Application
Typical 4 rails SPS
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
+5VSB ROC12(2) ROC12(1) ROC33 ROC5 = or
RPGO 4.7K
1 PGI 2 GND
+5VSB 1K PSON
PGO 16 Vcc 15 VS5 14 VS33 13 VS12A 12 IS33 1 1 IS5 10 OTP 9
RT NTC
PGO
3 FPO/ 4 PSON/ 5 IS12A 6 RI 7 IS12B 8 VS12B
CPGI RPGI RI
PS223
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. Over-Temperature Protection design example: (1) NTC (25-10K), (70-2.2K) (2) If 70 Over-Temperature occurred, VOTP =2.5V, 2.5 =
4-Channel Secondary Monitoring IC -7-
5 x RT ,RT=2.2K 2.2 K + RT
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Package Specification
( 16-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 Min 0.381 3.175 1.300 0.400 7.366 6.223 2.290 8.509 2.540 0 3.302 1.500 0.480 7.620 6.812 2.540 9.017 3.175 7 3.429 1.700 0.560 7.874 7.400 2.790 9.525 3.810 1.120 15 Normal Max 5.334
Dimension in inch Min 0.015 0.125 0.051 0.015 0.735 0.290 0.245 0.090 0.335 0.100 0 0.13 0.059 0.019 0.768 0.300 0.268 0.100 0.355 0.125 7 0.800 0.310 0.291 0.110 0.375 0.150 0.044 15 0.135 0.067 Normal Max 0.210
NOTE
18.669 19.495 20.320
4-Channel Secondary Monitoring IC -8-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
Package Specification (Continued)
( 16-pin SOP )
c
E
H
0.015 x 45
D
A
A1 b Seating Plane e L
0
5
10
mm
0.0
0.2
0.4
inch
Symbol A A1 b c D E e H L
Dimension in mm Min 1.346 0.051 0.330 0.190 9.800 3.800 1.270 5.791 0.400 0 6.200 1.270 8 Normal Max 1.753 0.250 0.510 0.250 10.008 4.000
Dimension in inch Min 0.053 0.002 0.013 0.007 0.386 0.150 0.050 0.228 0.018 0 0.244 0.050 8 Normal Max 0.069 0.010 0.020 0.010 0.394 0.157
NOTE
4-Channel Secondary Monitoring IC -9-
VersionA.006
SILICON TOUCH TECHNOLOGY INC.
PS223
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.
4-Channel Secondary Monitoring IC -10-
VersionA.006

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