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User Manual: Datasheets PS223, PS223S.

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PS223
Version
Issue Date
File Name
Total Pages

: A.003
: 2004/09/10
: SP-PS223-A.003.doc
: 11

4-Channel Secondary Monitoring IC
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

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
Version：A.003

4-Channel Secondary Monitoring IC
-1-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Block Diagram

VS12A
171KΩ

FPO/

12 UV
9.4KΩ

73uS
De-bounce

Vref

S Q
R
1MΩ

12 OV
18KΩ

Vref

delay
38mS
De-bounce
H : 4mS
L : 4.5uS

VS12B

Vcc

171KΩ
12 UV
9.4KΩ

Vref

18KΩ

Vref

20KΩ

12 OV

PSON/

OTP
2.5V

VS5
37.7KΩ
5 UV
8.3KΩ

Vref

delay
1
0

5 OV
12KΩ

H : 75mS
L : 4.5uS

Vref

1.13V

PGI
0.63V
R
Q S

VS33
16.3KΩ

1.25V
3.3 UV

8.9KΩ

Vref

12KΩ

Vref

VCCI

3.3 OV
1MΩ

PGO
delay
73uS
De-bounce

12 OC

H : 300mS
L : 4.5uS

IS12A
Iref X 8

12 OC

IS12B
Iref X 8
Power On
Reset

POR

Constant Current
Source Iref

RI

5 OC

IS5

Internal
Power

Iref X 8

VCCI = 4V

3.3 OC

IS33
Iref X 8

Band-Gap
Reference

Vref

Clock
Generator

CLK

GND

Version：A.003

4-Channel Secondary Monitoring IC
-2-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Timing Chart

Vcc

PSON/

FPO/

PGI

VS12A
VS12B
VS5
VS33

IS12A
IS12B
IS5
IS33

PGO

Td1

Tb1
Td3

Td2
AC
turn on

VPGI

UVP/OVP/OCP
protect

PSON/
turn on

PSON/
turn off

PSON/
turn on

AC
turn off

1.25V
1.13V
0.63V

Td1
Td2
OVP

OVP/UVP/OCP

OVP

Version：A.003

4-Channel Secondary Monitoring IC
-3-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Pin Descriptions
Pin No
1

PIN NAME
PGI

Descriptions
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

Absolute Maximum Ratings
Parameter
Storage Temperature

Rating

Unit

(Tstg)

-40

to

+125

°C

Operating Temperature (Topr)

-30

to

+90

°C

VCC

-0.5

to

+16.0

V

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

Supply Voltage

Input Voltage Range

Output Voltage Range

(VCC)

(VI)

(VO)

Version：A.003

4-Channel Secondary Monitoring IC
-4-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Electrical Characteristics, Vcc=12V, Ta = Full range. (unless otherwise specified)

Power Supply Section
Parameter

Conditions

Supply Voltage

MIN
4.2

Supply Current

VPSON/ = 5V

Power On Reset Threshold Voltage (VPOR)

TYP

MAX

Unit

5.0

16.0

V

4.5

5.0

mA

3.6

V
±0.6

Power On Reset Hysteresis (VHYST)

V

Over-Voltage Section
Parameter

Conditions

MIN

TYP

MAX

Unit

VS33

3.7

3.9

4.1

V

VS5

5.7

6.1

6.5

V

VS12A/B

13.1

13.8

14.5

V

Over-Voltage Threshold

Under-Voltage Section
Parameter

Conditions

MIN

TYP

MAX

Unit

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

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

MIN

TYP

MAX

2.4

2.5

2.6

Over-Temperature Section
Parameter

Conditions

Over-Temperature Threshold(VTH)

-0.26

Hysteresis (VHYST)

Unit
V
V

Version：A.003

4-Channel Secondary Monitoring IC
-5-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Electrical Characteristics (Continued)
PSON/, Analog Input
Parameter

Conditions

Threshold Voltage

MIN

TYP

1.16

MAX

1.25

1.33

±50

Hysteresis (VHYST)

Unit
V
mV

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 Voltage for mask OC,UV

1.05

1.13

1.21

V

±50

Hysteresis (VHYST)*

mV

* All of the comparator for PGI input in block diagram.

PGO, Open Drain Digital Output
Parameter

Conditions

Leakage Current (ILKG)

VPGO=5V

Low Level Output Voltage (VOL)

ISINK=10mA

MIN

TYP

MAX

Unit

5

uA

0.3

V

FPO/, Open Drain Digital Output
Parameter

Conditions

Leakage Current (ILKG)

VFPO/=5V

Low Level Output Voltage (VOL)

ISINK=10mA

MIN

TYP

MAX

Unit

5

uA

0.3

V

Switching Characteristics, Vcc=12V, Ta = Full range.
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

Version：A.003

4-Channel Secondary Monitoring IC
-6-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Application
Typical 4 rails SPS
S.P.S. Secondary Side
RS5

+5V Output

RS33

+3.3V Coil

+3.3V Output

RS12(1)

+12V(1) Coil

+12V(1) Output

RS12(2)

+12V(2) Coil

+12V(2) Output

+5VSB
ROC5

ROC33

or

ROC12(1)

ROC12(2)

=

RPGO
4.7K

+5VSB

1 PGI

PGO 16

2 GND

Vcc 15

3 FPO/

VS5 14

PGO

1K

4 PSON/

PSON

5 IS12A

VS33 13
VS12A 12
Cby

6 RI

NTC

IS33 11

7 IS12B
8 VS12B

IS5 10
OTP 9

RI

RPGI

CPGI

RT

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 ≥ 0.002Ω.
4. Over-Current Protection design example:
V
1.25
(1) I ref = 20 μA , RI = RI =
= 62.5 K (Ω )
I RI 20μ
(2) RS5=0.002 Ω , ΔV5V = 0.002 × I +5V = ROC 5 × 8 × I ref
(3) If +5V OCP trip point is 20A, ROC 5 =

0.002 × 20
= 250(Ω )
8 × 20 μ

5. Over-Temperature Protection design example:
(1) NTC (25℃-10K), (70℃-2.2K)
(2) If 70℃ Over-Temperature occurred, VOTP =2.5V, 2.5 =

5 × RT
,RT=2.2K
2.2 K + RT
Version：A.003

4-Channel Secondary Monitoring IC
-7-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Package Specification
( 16-pin DIP )

E1

E

eB

θ°

D

A2

A
Seating Plane

A1

b1

e

b

0

5

S

10

0.0

Symbol

Dimension in mm
(MAX)

Dimension in inch

5.330

A1

0.380

(MIN)

0.015

(MIN)

A2

3.300

± 0.130

0.130

± 0.005

0.210

(TYP)

b

1.520

(TYP)

0.060

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)

0° ~ 15°

20

25

mm

1.0 inch

NOTE

(MAX)

b1

θ°

15

0.5

A

L

0° ~ 15°

Version：A.003

4-Channel Secondary Monitoring IC
-8-

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.

PS223

Package Specification (Continued)
( 16-pin SOP )

E

H

h x 45°

D

C

A

A1
B

θ

e

L

Seating Plane

0

5

0.0

Dimension in mm
Symbol

MIN.

MAX.

0.2

MIN.

inch

NOTE

MAX.

A

1.35

1.75

0.0532

0.0688

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

1.27BSC

mm

0.4

Dimension in inch

A1

e

10

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°

Version：A.003

4-Channel Secondary Monitoring IC
-9-

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.

Version：A.003

4-Channel Secondary Monitoring IC
-10-

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