PS224L - Silicon Touch Technology Inc.

PS224L
Version
Issue Date
File Name
Total Pages
: A.002
: 2011/07/05
: SP-PS224L-A.002.doc
: 11
4-Channel Secondary Monitoring IC
新竹市科學園區展業一路 9 號 4 樓之 3
SILICON TOUCH TECHNOLOGY INC.
9-4F-3, Prosperity Road I, Science Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C.
Tel：886-3-5645656
Fax：886-3-5645626
PS224L
PS224L
4-Channel Secondary Monitoring IC
General Description
PS224 is specially designed for switching power supply system. Four important
functions of PS224 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
4-Channel Secondary Monitoring IC
Version：A.002
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Page 1
PS224L
Block Diagram
VS12A
159KΩ
FPO/
delay
12 UV
S Q
5KΩ
Vref
14uS
R
1MΩ
12 OV
16KΩ
Vref
delay
38mS
De-bounce
H : 4mS
L : 4.5uS
VS12B
159KΩ
12 UV
5KΩ
Vref
16KΩ
Vref
VCC
30KΩ
12 OV
VCCI
2KΩ
PSON/
1.25V
4.5V
90KΩ
VS5
64.5KΩ
5 UV
6KΩ
Vref
delay
1
0
5 OV
H : 75mS
L : 4.5uS
19.5KΩ Vref
1.25V
PGI
0.63V
R
Q S
VS33
51KΩ
1.25V
3.3 UV
10KΩ
Vref
29KΩ
Vref
VCCI
3.3 OV
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
1mS
1mS
Pext
VCCI
IS12B
1.25V
Step Down
to near 2.5V
12 OC
delay
Power On
Reset
Iref X 8
IS5
Step Down
to near 2.5V
POR
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
3.3 OC
Band-Gap
Reference
Vref
1.25V
Clock
Generator
CLK
VCC
GND
Iref X 8
4-Channel Secondary Monitoring IC
Version：A.002
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Page 2
PS224L
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
0.63V
Td1
Td2
OVP
4-Channel Secondary Monitoring IC
OVP/UVP/OCP/Pext
OVP
Version：A.002
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Page 3
PS224L
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
5
PSON/
IS12A
Remote ON/OFF control input pin
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
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
ISX, VS12, IS12
-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
+16.0
V
PGO
-0.5 to
Vcc+0.5
V
RI
12.5 to
62.5
uA
PSON/, PGO
>
5000
V
FPOB, VS12
>
2000
V
PGI, IS12, VS5
>
3000
V
Others
>
4000
V
Input Voltage Range
(VI)
Output Voltage Range
(VO)
Output Current for RI
(IRI)
ESD Susceptibility*
(VESD)
* Human Body Model (HBM).
4-Channel Secondary Monitoring IC
Version：A.002
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Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page 4
PS224L
Electrical Characteristics, Vcc=12V, Ta = Full range. (unless otherwise specified)
Power Supply Section
Parameter
Conditions
MIN
Supply Voltage
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
3.8
3.9
4.0
V
VS5
5.6
5.8
6.0
V
VS12A/B
13.5
14.0
14.2
V
Over-Voltage Threshold
Under-Voltage Section
Parameter
Conditions
MIN
TYP
MAX
Unit
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
(OCP Comparator)
Conditions
MIN
TYP
MAX
Unit
VS33/VS5
-5
0
3
mV
VS12A/B
-5
0
1
mV
1.20
1.25
1.30
24
45
mV
uA
Constant Current Generator Voltage (VRI)
R = 62.5K
TA = -30˚C
to 90˚C
Deviation of VRI over full temperature range
( VRI(dev) )
IS Sink Current
Iref = 20uA
IS33/IS5/IS12A/IS12B
IIS to Iref Current Gain ( GIS )
Deviation of GIS over full temperature range
( GIS(dev) )
4-Channel Secondary Monitoring IC
V
R = 62.5K
148
160
172
Iref = 20uA
7.5
8
8.5
0.08
0.28
TA = -30˚C
to 90˚C
Iref = 20uA
Version：A.002
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Page 5
PS224L
Electrical Characteristics (Continued)
PGI, Analog Input
Parameter
Conditions
MIN
TYP
MAX
Unit
Threshold Voltage for start Td1
1.16
1.25
1.28
V
Threshold Voltage for start Td2
0.60
0.63
0.75
V
Threshold Voltage for mask OC,UV
1.04
1.13
1.20
V
Threshold Voltage for PGO disable
1.08
1.20
1.20
V
Hysteresis (VHYST)*
20
50
80
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=20mA
MIN
TYP
MAX
Unit
5
uA
0.3
V
PSON/, Analog Input
Parameter
Conditions
MIN
TYP
MAX
Threshold Voltage
1.16
1.25
1.33
Hysteresis (VHYST)
20
50
80
Unit
V
mV
External Protection Detect Section
Parameter
Threshold(VTH)
Conditions
MIN
TYP
MAX
Unit
1.20
1.25
1.30
V
-20
-50
-80
mV
Hysteresis (VHYST)
4-Channel Secondary Monitoring IC
Version：A.002
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Page 6
PS224L
Electrical Characteristics (Continued)
Switching Characteristics, Vcc=12V, Ta = Full range.
Parameter
Conditions
MIN
TYP
MAX
Unit
PGI to PGO Delay Time (Td1)
200
300
400
mS
Short Circuit Delay Time (Td2)
49
75
100
mS
PGO to FPO/ Delay Time (Td3)
2
4
6
mS
Under Voltage Delay Time (Td4)
0.6
1
1.4
mS
Over Current Delay Time (Td5)
13
20
27
mS
Over Voltage Delay Time (Td6)
9
14
19
uS
Pext Delay Time (Td7)
0.6
1
1.4
mS
PSON/ De-bounce Time (Tb1)
24
38
52
mS
PGO Noise De-glitch Time (Tb2)
47
73
100
uS
4-Channel Secondary Monitoring IC
Version：A.002
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Page 7
PS224L
Application
Typical 4 rails SPS
S.P.S. Secondary Side
RS5
+3.3V Coil
+12V(1) Output
RS12(2)
+12V(2) Coil
+12V(2) Output
ROC5
ROC33
ROC12(1)
ROC12(2)
or
+3.3V Output
RS12(1)
+12V(1) Coil
=
+5V Output
RS33
RPGO
4.7K
+5VSB
1 PGI
PGO 16
2 GND
Vcc 15
3 FPO/
VS5 14
PGO
+5VSB
1K
4 PSON/
PSON
5 IS12A
VS33 13
VS12A 12
IS33 11
7 IS12B
8 VS12B
Cby
6 RI
IS5 10
Pext 9
Pext
RI
RPGI
CPGI
PS224
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 =
4-Channel Secondary Monitoring IC
0.002 × 20
= 250(Ω )
8 × 20 μ
Version：A.002
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Page 8
PS224L
Package Specification
( 16-pin SOP )
c
E
H
0.015 x 45°
D
A
A1
b
Seating Plane
5
0.0
Dimension in mm
Min
Normal
10
0.2
Dimension in inch
Max
Min
Normal
A
1.346
1.753
0.053
0.069
0.051
0.250
0.002
0.010
b
0.330
0.510
0.013
0.020
c
0.190
0.250
0.007
0.010
D
9.800
10.008
0.386
0.394
E
3.800
4.000
0.150
1.270
mm
0.4
inch
NOTE
Max
A1
e
L
0.004
MAX
0
Symbol
θ°
e
0.157
0.050
H
5.791
6.200
0.228
0.244
L
0.400
1.270
0.018
0.050
θ°
0
8
0
8
4-Channel Secondary Monitoring IC
Version：A.002
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Page 9
PS224L
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.002
未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page 10