PS224B

PS224B
Version
Issue Date
File Name
Total Pages
: A.001
: 2007/05/17
: SP-PS224B-A.001.doc
: 10
4-Channel Secondary Monitoring IC
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.
Fax：886-3-5645626
Tel：886-3-5645656
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
PS224B
4-Channel Secondary Monitoring IC
General Description
PS224B is specially designed for switching power supply system. Four important
functions of PS224B 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 dual
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 protection input pin provides the flexibility for design protection
circuit.
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
Additional protection input
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
Wide power supply range (3.8V~16V)
Special care for AC power off
Version：A.001
4-Channel Secondary Monitoring IC
-1-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Block Diagram
VS12A
R1
FPO/
delay
12 UV
S Q
R2
Vref
14uS
R
1MΩ
12 OV
R3
Vref
delay
38mS
De-bounce
H : 4mS
L : 4.5uS
VS12B
R1
12 UV
R2
Vref
R3
Vref
12 OV
VCCI
PSON/
Vref
VS5
R4
5 UV
R5
Vref
delay
5 OV
R6
H : 75mS
L : 4.5uS
Vref
PGI
Selection
PGI
VS33
R7
3.3 UV
R8
Vref
VCCI
3.3 OV
R9
Vref
1MΩ
PGO
delay
VCCI
IS12A
Step Down
to near 2.5V
73uS
De-bounce
12 OC
Iref X 8
H : 300mS
L : 4.5uS
delay
delay
3mS
3mS
Pext
VCCI
IS12B
1.25V
Step Down
to near 2.5V
12 OC
delay
Power On
Reset
Iref X 8
Step Down
to near 2.5V
Constant Current
Source Iref
5 OC
Internal
Power
Iref X 8
VCCI = 4V
VCC
VCCI
IS33
Step Down
to near 2.5V
RI
H : 20mS
L : 4.5uS
VCCI
IS5
POR
3.3 OC
Band-Gap
Reference
Vref
1.25V
Clock
Generator
CLK
VCC
GND
Iref X 8
Version：A.001
4-Channel Secondary Monitoring IC
-2-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Timing Chart
Vcc
PSON/
FPO/
PGI
VS12A
VS12B
VS5
VS33
Pext
IS12A
IS12B
IS5
IS33
PGO
Td1
Tb1
Td3
Td2
AC
turn on
VPGI
UVP/OVP/OCP
Pext protect
PSON/
turn on
PSON/
turn off
PSON/
turn on
AC
turn off
1.25V
1.13V
0.25V
Td1
Td2
OVP
OVP/UVP/OCP/Pext
OVP
Version：A.001
4-Channel Secondary Monitoring IC
-3-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
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
Pext
External protection detect 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, VS12B, IS12A,IS12B
-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/, Pext
-0.5 to
Vcc+0.5
V
FPO/
-0.5 to
Vcc+0.5
V
PGO
-0.5 to
Vcc+0.5
V
RI
12.5 to
62.5
uA
PSON/, PGO
>
5000
V
FPOB, VS12A, VS12B
>
2000
V
PGI, IS12A, IS12B, VCC
>
3000
V
Others
>
4000
V
Supply Voltage
Input Voltage Range
(VCC)
(VI)
Output Voltage Range
(VO)
Output Current for RI
(IRI)
ESD Susceptibility*
(VESD)
* Human Body Model (HBM).
Version：A.001
4-Channel Secondary Monitoring IC
-4-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Electrical Characteristics, Vcc=12V, Ta = 25ºC. (unless otherwise specified)
Power Supply Section
Parameter
Conditions
Supply Voltage
MIN
3.8
Supply Current
Power On Reset Hysteresis (VHYST)
MAX
Unit
5.0
16.0
V
4.5
5.0
mA
3.2
3.4
3.6
V
-0.15
-0.3
-0.45
V
VPSON/ = 5V
Power On Reset Threshold Voltage (VPOR)
TYP
Over-Voltage Section
Parameter
Conditions
MIN
TYP
MAX
Unit
VS33
3.9
4.0
4.1
V
VS5
5.9
6.1
6.3
V
VS12A/B
13.75
14.1
14.45
V
MAX
Unit
Over-Voltage Threshold
Under-Voltage Section
Parameter
Conditions
MIN
TYP
VS33
2.8
2.9
3.0
V
VS5
4.2
4.4
4.6
V
VS12A/B
10.3
10.8
11.0
V
Under-Voltage Threshold
Over-Current Section
Parameter
Offset Voltage
Conditions
MIN
TYP
VS33, VS5
-5
0
3
mV
VS12A/B
-4
0
2
mV
1.20
1.25
1.30
MIN
TYP
MAX
Constant Current Generator Voltage (VRI)
MAX
Unit
V
PGI, Analog Input
Parameter
Conditions
Unit
Threshold Voltage for start Td1
1.16
1.25
1.33
V
Threshold Voltage for start Td2
0.15
0.25
0.35
V
Threshold Voltage for mask OC,UV
1.05
1.13
1.21
V
+/-50
+/-80
mV
+/-20
Hysteresis (VHYST)*
* All of the comparator for PGI input in block diagram.
Version：A.001
4-Channel Secondary Monitoring IC
-5-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Electrical Characteristics (Continued)
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=20mA
MIN
TYP
MAX
Unit
5
uA
0.3
V
PSON/, Analog Input
Parameter
Conditions
MIN
TYP
MAX
Unit
Threshold Voltage ( High )
1.40
1.50
1.60
V
Threshold Voltage ( Low )
0.75
0.85
0.95
V
External Protection Detect Section
Parameter
Conditions
Threshold(VTH)
MIN
TYP
MAX
Unit
1.20
1.25
1.30
V
+/-50
+/-80
+/-20
Hysteresis (VHYST)
mV
Switching Characteristics, Vcc=12V, Ta = 25ºC.
Parameter
Conditions
PGI to PGO Delay Time (Td1)
MIN
TYP
MAX
Unit
200
300
400
mS
Short Circuit Delay Time (Td2)
PGI> 0.25V
49
75
100
mS
Short Circuit Delay Time (Td2-1)
PGI< 0.25V
400
500
600
mS
2
4
6
mS
Under Voltage Delay Time (Td4)
2.4
3
3.6
mS
Over Current Delay Time (Td5)
13
20
27
mS
Over Voltage Delay Time (Td6)
9
14
19
uS
Pext Delay Time (Td7)
2.4
3
3.6
mS
PSON/ De-bounce Time (Tb1)
24
38
52
mS
PGO Noise De-glitch Time (Tb2)
47
73
100
uS
PGO to FPO/ Delay Time (Td3)
Version：A.001
4-Channel Secondary Monitoring IC
-6-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Application
Typical 4 rails SPS
S.P.S. Secondary Side
RS5
+5V Output
RS33
+3.3V Coil
+3.3V Output
R S12A
+12VA Coil
+12VA Output
R S12B
+12VBCoil
+12VB Output
VDET
ROC5
ROC33
R OC12A
R OC12B
RPGO
4.7K
R PGI-1
CPGI-1
1K
1 PGI
PGO 16
2 GND
Vcc 15
+5V SB
3 FPO/
PSON
4 PSON/
+5V SB
VS5 14
PEXT 9
Pext
C12A-1
0.1 uF
C PGO 0.1 uF
IS5 10
8 VS12B
Cby
IS12B
0.1 uF
RI
C12B-1
RPGI-2
CPGI-2
C PS ON 0.1 uF
7
0.1 uF
IS33 11
C 5-1
VS12A 12
6 RI
0.1 uF
IS12A
VS33 13
C 33-1
5
PGO
C 12A-2 0.1 uF
C 12B-2 0.1 uF
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
Version：A.001
4-Channel Secondary Monitoring IC
-7-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
Package Specification
( 16-pin DIP )
E1
eB
E
θ°
D
A
Seating Plane
A1
b1
e
b
0
5
10
0.0
Symbol
Dimension in mm
Min
Normal
Max
0.38
eB
7.29
Normal
8.41
9.53
0.287
0.331
0.375
0.06
0.018
19.18
19.69
0.735
0.755
0.775
E1
6.01
6.30
6.55
0.238
0.248
0.258
e
2.18
2.54
2.90
0.086
0.100
0.114
7.62
L
2.54
0º
1.0 inch
0.210
18.67
θ°
mm
Max
D
E
25
0.015
0.46
b1
20
NOTE
Dimension in inch
Min
1.52
b
15
0.5
5.33
A
A1
L
7º
0.3
3.81
0.100
15º
0º
0.150
7º
15º
Version：A.001
4-Channel Secondary Monitoring IC
-8-
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS224B
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.001
4-Channel Secondary Monitoring IC
-9-