Page 1
PS223
4-Channel Secondary Monitoring IC
Version : A.003
Issue Date :
File Name : SP-PS223-A.003.doc
Total Pages : 11
2004/09/10
With 4-Channel OCP
And an Additional OTP
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
Page 2
點晶科技股份有限公司
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 Version：A.003
-1-
Page 3
f
f
f
f
f
f
f
f
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Block Diagram
VS12A
VS12B
171KΩ
9.4KΩ
18KΩ
171KΩ
9.4KΩ
18KΩ
Vre
Vre
Vre
Vre
12 UV
12 OV
12 UV
12 OV
PS223
73uS
De-bounce
38mS
De-bounce
S Q
R
delay
H : 4mS
L : 4.5uS
1MΩ
20KΩ
FPO/
Vcc
PSON/
VS5
VS33
IS12A
IS12B
IS5
37.7KΩ
8.3KΩ
12KΩ
16.3KΩ
8.9KΩ
12KΩ
Iref X 8
Iref X 8
Iref X 8
2.5V
5 UV
Vre
5 OV
Vre
3.3 UV
Vre
3.3 OV
Vre
12 OC
12 OC
5 OC
delay
H : 75mS
L : 4.5uS
Power On
Internal
Reset
Power
73uS
De-bounce
V CCI = 4V
POR
1
0
R
Q
S
delay
H : 300mS
L : 4.5uS
1.13V
0.63V
1.25V
VCCI
1MΩ
Constant Current
Source Iref
OTP
PGI
PGO
RI
IS33
Iref X 8
3.3 OC
Band-Gap
Reference
Vref
Clock
Generator
CLK
GND
4-Channel Secondary Monitoring IC Version：A.003
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Page 4
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Timing Chart
PS223
VS12A
VS12B IS12B
VS5 IS5
VS33 IS33
Vcc
PSON/
FPO/
PGI
IS12A
PGO
AC
turn on
Td1 T
T
d2
UVP/OVP/OCP
protect
PSON/
turn on
b1
PSON/
turn off
T
d3
PSON/
turn on
AC
turn off
VPGI
1.25V
0.63V
Td1
Td2
OVP OVP/UVP/OCP
4-Channel Secondary Monitoring IC Version：A.003
1.13V
OVP
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Page 5
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Pin Descriptions
Pin No PIN NAME Descriptions
1 PGI Power good input signal pin
2 GND Ground
3 FPO/ Inverted fault protection output ,open drain output stage
4 PSON/ Remote ON/OFF control input pin
5 IS12A 12V(1) over current protection input pin
6 RI Current sense setting
7 IS12B 12V(2) over current protection input pin
8 VS12B 12V(2) over/under voltage protection input pin
9 OTP Over temperature protection input pin
10 IS5 5.0V over current protection input pin
11 IS33 3.3V over current protection input pin
12 VS12A 12V(1) over/under voltage protection input pin
13 VS33 3.3V over/under voltage protection input pin
14 VS5 5.0V over/under voltage protection input pin
15 VCC Power supply
16 PGO Power good output signal pin , open drain output stage
PS223
Absolute Maximum Ratings
Parameter Rating Unit
Storage Temperature (Tstg) -40 to +125 ° C
Operating Temperature (Topr) -30 to +90 ° C
Supply Voltage (VCC) VCC -0.5 to +16.0 V
Input Voltage Range (VI)
Output Voltage Range (VO)
VS12A/B, IS12A/B -0.5 to +16.0 V
VS5, IS5 -0.5 to +9.0 V
VS33, IS33 -0.5 to +7.0 V
PGI -0.5 to +16.0 V
PSON/, OTP -0.5 to Vcc+0.5 V
FPO/ -0.5 to +16.0 V
PGO -0.5 to Vcc+0.5 V
4-Channel Secondary Monitoring IC Version：A.003
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Page 6
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS223
Electrical Characteristics, Vcc=12V, T
Power Supply Section
Parameter Conditions MIN TYP MAX Unit
Supply Volt age 4.2 5.0 16.0 V
Supply Current VPSON/ = 5V 4.5 5.0 mA
Power On Reset Threshold Voltage (VPOR) 3.6 V
Power On Reset Hysteresis (VHYST)
Over-Voltage Section
Parameter Conditions MIN TYP MAX Unit
Over-Volt age Thre shold
VS33 3.7 3.9 4.1 V
VS12A/B 13.1 13.8 14.5 V
= Full range. (unless otherwise specified)
a
±0.6
VS5 5.7 6.1 6.5 V
V
Under-Voltage Section
Parameter Conditions MIN TYP MAX Unit
Under-Voltage Threshold
Over-Current Section
Parameter Conditions MIN TYP MAX Unit
Constant Current Generator Voltage (VRI) 1.20 1.25 1.30 V
Constant Current (IRI) 12.5 20.0 62.5 uA
Over-Temperature Section
Parameter Conditions MIN TYP MAX Unit
Over-Temperature Threshold(VTH) 2.4 2.5 2.6 V
Hysteresis (VHYST)
VS33 2.0 2.2 2.4 V
VS5 3.3 3.5 3.7 V
VS12A/B 8.5 9.0 9.5 V
-0.26
V
4-Channel Secondary Monitoring IC Version：A.003
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Page 7
±
±
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Electrical Characteristics (Continued)
PSON/, Analog Input
Parameter Conditions MIN TYP MAX Unit
Threshold V oltage 1.16 1.25 1.33 V
Hysteresis (VHYST)
PGI, Analog Input
Parameter Conditions MIN TYP MAX Unit
Threshold Voltage for start Td1 1.16 1.25 1.33 V
Threshold Voltage for start Td2 0.60 0.63 0.75 V
Threshold V oltage for mask OC,UV 1.05 1.13 1.21 V
Hysteresis (VHYST)*
* All of the comparator for PGI input in block diagram.
50
50
PS223
mV
mV
PGO, Open Drain Digital Output
Parameter Conditions MIN TYP MAX Unit
Leakage Current (ILKG) VPGO=5V 5 uA
Low Level Output Voltage (VOL) ISINK=10mA 0.3 V
FPO/, Open Drain Digital Output
Parameter Conditions MIN TYP MAX Unit
Leakage Current (ILKG) VFPO/=5V 5 uA
Low Level Output Voltage (VOL) ISINK=10mA 0.3 V
Switching Characteristics
Parameter Conditions MIN TYP MAX Unit
PGI to PGO Delay Time (Td1) 200 300 480 mS
Short Circuit Delay Time (Td2) 49 75 114 mS
PGO to FPO/ Delay Time (Td3) 2 4 6 mS
PSON/ De-bounce Time (Tb1) 24 38 61 mS
FPO/ Noise De-glitch Time (Tb2) 47 73 110 uS
PGO Noise De-glitch Time (Tb3) 47 73 110 uS
, Vcc=12V, Ta = Full range.
4-Channel Secondary Monitoring IC Version：A.003
-6-
Page 8
μ
××=
×
×
×
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Application
Typical 4 rails SPS
S.P.S. Secondary Side
Coil
(1)
Coil
(2)
RS5
R
R
R
S33
S12(1)
S12(2)
PS223
+5V Output
+3.3V Output+3.3V Coil
+12V
+12V
Output+12V
(1)
Output+12V
(2)
+5VSB
PGO
NTC
R
T
= or
+5V
SB
PSON
1K
R
R
OC12(2)
OC12(1)
1
PGI
GND
2
FPO/
3
PSON/
4
IS12A
5
RI
6
IS12B
7
VS12B
R
C
PGI
PGI
R
I
8
PS223
R
OC33
PGO
Vcc
VS5
VS33
VS12A
IS33
IS5
OTP
R
OC5
R
4.7K
PGO
16
15
14
13
12
11
10
9
C
by
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 R
S12(1)
, R
, RS5 and R
S12(2)
are ≥ 0.002Ω.
S33
4. Over-Current Protection design example:
V
(1) AI
ref
20= ,
R
RI
I
I
RI
(2) RS5=0.002Ω ,
(3) If +5V OCP trip point is 20A,
25.1
20
μ
=Δ
()
Ω=== K
5.62
+
R
IRIV
8002.0
555
= 250
5μOC
×
refOCVV
20002.0
208
()
Ω=
5. Over-Temperature Protection design example:
(1) NTC (25℃-10K), (70℃-2.2K)
R
5
(2) If 70℃ Over-Temperature occurred, V
=2.5V,
OTP
5.2
=
4-Channel Secondary Monitoring IC Version：A.003
-7-
T
,RT=2.2K
RK
+
2.2
T
Page 9
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Package Specification
( 16-pin DIP )
PS223
E
1
D
A
A
2
Seating Plane
A
L
1
b
b
1
0 10 25 mm155 20
0.0 0.5 1.0 inch
e
S
E
eB
θ°
A 5.330 (MAX) 0.210 (MAX)
Dimension in mm Symbol Dimension in inch
A1 0.380 (MIN) 0.015 (MIN)
A2 3.300 ± 0.130 0.130 ± 0.005
b 1.520 (TYP) 0.060 (TYP)
b1 0.460 (TYP) 0.018 (TYP)
D 19.180 ± 0.200 0.755 ± 0.008
E 7.620 (TYP) 0.300 (TYP)
E1 6.350 ± 0.130 0.250 ± 0.005
e 2.540 (TYP) 0.100 (TYP)
eB 9.000 ± 0.500 0.355 ± 0.020
L 3.302 ± 0.500 0.130 ± 0.020
S 1.800 (TYP) 0.074 (TYP)
θ° 0° ~ 15° 0° ~ 15°
NOTE
4-Channel Secondary Monitoring IC Version：A.003
-8-
Page 10
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Package Specification (Continued)
( 16-pin SOP )
D
PS223
E H
h x 45°
B
Seating Plane
0 10
0.0 0.2 0.4 inch
Symbol
MIN. MAX. MIN. MAX.
A 1.35 1.75 0.0532 0.0688
A1 0.10 0.25 0.0040 0.0098
B 0.33 0.51 0.013 0.020
C 0.19 0.25 0.0075 0.0098
e 1.27BSC 0.050BSC
D 9.80 10.00 0.3859 0.3937
H 5.80 6.20 0.2284 0.2440
E 3.80 4.00 0.1497 0.1574
L 0.40 1.27 0.016 0.050
h 0.25 0.50 0.0099 0.0196
θ 0° 8° 0° 8°
Dimension in mm
Dimension in inch
e
5
A
A
1
L
mm
NOTE
C
θ
4-Channel Secondary Monitoring IC Version：A.003
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Page 11
點晶科技股份有限公司
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 Version：A.003
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Page 12
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