Product Specification
SG6520
PC Power Supply Supervisors
FEATURES
Two 12V sense input pins: VS12 and VS12B
Over voltage protection (OVP) for 3.3V, 5V, and
two 12V
Over current protection (OCP) for 3.3V, 5V, and two
12V
Under voltage protection (UVP) for 3.3V, 5V, and
two 12V
Open drain output for PGO and FPO pins
300mS power good delay
300mS turn on delay for 3.3V, 5V and two 12V
2.8mS PSON control to FPO turn-off delay
48mS PSON control delay
No lockup during the fast AC power on/off
Wide supply voltage range from 4.2V to 15V
Programmable over temperature protection(OTP)
DESCRIPTION
SG6520 is designed to provide the voltage, and current
supervisor function, remote on/off (PSON) function,
power good (PGO) indicator function, and fault
protection (FPO) function for switching power systems.
For supervisor function, it provides the over voltage
protection (OVP) for 3.3V, 5V and two 12V; over current
protection (OCP) for 3.3V, 5V and two 12V; under
voltage protection (UVP) for 3.3V, 5V and two 12V.
When 3.3V, 5V or 12V voltage is decreasing to 2.3V,
3.5V and 9V respectively, the under voltage protection
(UVP) function will be enabled. FPO will be set to high to
turn off the PWM controller IC. The voltage difference
across external current shunt is used for OCP functions.
An external resistor can be used to adjust protection
threshold.
The power supply is turned on after 48mS delay time
when PSON signal is set from high to low. To turn off
power supply, PSON signal is set from low to high with
the delay time 48mS. The PGI circuitry provides a
power-down warning signal for PGO. When PGI input is
lower than the internal 1.25V reference voltage, PGO
signal is pulled low.
TYPICAL APPLICATION
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-1-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
MARKING INFORMATION
PIN CONFIGURATION
T: D = DIP, S = SOP
P: Z = Lead Free
Null=regular package
SG6520TP
XXXXXXXXYWWV
XXXXXXXX: Wafer Lot
Y: Year; WW: Week
V: Assembly Location
ORDERING INFORMATION
Part Number
Pb-Free Package Type
SG6520DZ
16 pin DIP Plastic
SG6520SZ (Preliminary)
16 pin SOP Plastic
PIN DESCRIPTIONS
Pin No. Pin Name
Type
Description
1
PGI
Analog input
Power Good Input. For ATX SMPS, it detects AC line voltage through the main
transformer.
2
GND
Supply
Ground.
3
FPO
Logic output
Fault Protection Output. Output signal to control the primary PWM IC through an
opto-coupler. When FPO is low, the PWM IC is enabled.
4
PSON
Logic input
Remote On/Off logic input from CPU or main-board. The power supply will be turned on/off
after 48mS delay.
5
IS12
Analog input
12V over current protection sense input. For typical application, this pin is connected to the
positive end of a current shunt through one resistor. When the voltage on IS12 is higher
than that of VS12 by 5mV, OCP will be enabled.
6
RI
Analog input
Reference setting. One external resistor Ri connected between RI and GND pin will
determine a reference current, Iref = 1.25/Ri, for OCP programming.
7
IS12B
Analog input
12V over current protection sense input. For typical application, this pin is connected to the
positive end of a current shunt through one resistor. When the voltage on IS12 is higher
than that of VS12 by 5mV, OCP will be enabled.
8
VS12B
Analog input
Second 12V over/under-voltage control sense input.
9
OTP
Analog input
For over-temperature protection.
10
IS5
Analog input
5V over current protection sense input.
11
IS33
Analog input
3.3V over current protection sense input.
12
VS12
Analog input
12V over/under-voltage control sense input.
13
VS33
Analog input
3.3V over/under-voltage control sense input.
14
VS5
Analog input
5V over/under-voltage control sense input.
15
VDD
Supply
Supply voltage. 4.2V ~ 15V. For ATX SMPS, it is connected to 5V-standby and 12V
through diodes respectively.
16
PGO
Logic output
Power good logic output, 0 or 1(open-drain). Power good=1 means that the power supply is
good for operation. The power good delay is 300mS.
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-2-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
BLOCK DIAGRAM
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-3-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
FUNCTION TABLE
PGI
PSON
UV Protection 12V & OC Protection OV Protection FPO
PGO
PGI<1.25V
L
No
No
L
PGI<1.25V
L
No
Yes
H
L
PGI<1.25V
L
Yes
No
L
L
PGI<1.25V
L
Yes
Yes
H
L
PGI>1.25V
L
No
No
L
H
PGI>1.25V
L
No
Yes
H
L
PGI>1.25V
L
Yes
No
H
L
PGI>1.25V
L
Yes
Yes
H
L
X
H
X
X
H
L
L
x = don’t care
FPO = L means: fault IS NOT latched
FPO = H means: fault IS latched
PGO = L means: fault
PGO = H means: No fault
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-4-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
TIMING DIAGRAM
PSON On/Off and 3.3V, 5V OVP Function
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-5-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
12V OVP/UVP and OCP Function
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-6-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
16
V
-0.3 to 7
V
VI
Input Voltage
PSON, VS33, VS5, PGI,
IS33, IS5, OTP
Input Voltage
VS12, VS12B, IS12,IS12B -0.3 to 15
VOUT
Output Voltage
FPO, PGO
TJ
Operating Junction Temperature
TSTG
TL
V
8
V
-40 to 125
℃
Storage Temperature Range
-55 to 150
℃
Lead Temperature (Wave soldering or IR, 10 seconds)
260
℃
ESD Capability, HBM Model
4.5
KV
ESD Capability, Machine Model
200
V
*All voltage values, except differential voltages, are given with respect to GND pin.
* Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
Test Conditions
4.2 to 15
V
TOPER
Operating Ambient Temperature Range
-25 to +85
℃
* For proper operation
ELECTRICAL CHARACTERISTICS (VDD=12V, TA=25℃, UNLESS NOTED)
VDD Section
Symbol
Parameter
Test Conditions
Typ.
Max.
IDD1
Supply Current
PSON = Low
1.7
2.6
mA
IDD2
Supply Current
PSON = High
1.0
1.5
mA
4.2
V
Unit
TR
Supply Voltage Rising Time
VST
VDD Start Threshold Voltage
Min.
1
Unit
mS
Over Voltage and Over Current Protection
Symbol
Parameter
Test Conditions
Over Voltage Protection VS33
VOVP
IREF
Min.
Typ.
Max.
3.7
3.9
4.1
Over Voltage Protection VS5
5.7
6.1
6.5
Over Voltage Protection VS12, VS12B
13.2
13.8
14.4
7.6
8
8.4
Ratio of current sense sink current to current
sense setting pin (RI) source current
RI = 30 ΚΩ,
0.1% Resistor
VOFFSET
OCP comparator input offset voltage
ILKG
Leakage Current (FPO)
V(FPO) = 5V
5
uA
VOL
Low Level Output Voltage (FPO)
Isink 20mA
0.4
V
TOVP
OVP Delay Time
33
75
110
uS
TOCP
OCP Delay Time
12.5
20
27.5
mS
VRI
RI Pin Voltage
1.237
1.25
1.262
V
IRI
Output Current RI
12.5
62.5
uA
TST-OCP
Start-up OCP / UVP Protection Time
From FPO Low to FPO High
450
mS
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-5
PGI < 1.25V ,FPO=Low
-7-
200
5
V
300
mV
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
Under Voltage Protection and PGI, PGO
Symbol
Parameter
Min.
Typ.
Max.
Unit
VPGI
Input Threshold Voltage PGI
1.225
1.25
1.275
V
Under Voltage Protection VS33
2.1
2.3
2.5
Under Voltage Protection VS5
3.3
3.5
3.7
Under Voltage Protection VS12, VS12B
8.5
9.0
9.5
VUVP
Test Conditions
V
TOND
Under Voltage Turn-on Delay Time
PGI > 1.25V
49
75
114
mS
TUVP
UVP Delay Time
PGI > 1.25V
175
275
375
uS
ILKG-PGO
Leakage Current (PGO)
PGO = 5V
5
uA
VOL-PGO
Low Level Output Voltage (PGO)
VDD = 12V
Isink 10Ma
0.4
V
TPG
Timing PG Delay
PGI to PGO
200
300
450
mS
TND
Noise Deglitch Time
PGI to PGO
90
150
210
uS
Typ.
Max.
Unit
PSON Control
Symbol
Parameter
Test Conditions
IPSON
Input Pull-up Current
PSON = 0V
VIH
High-level Input Voltage
Min.
120
uA
2
VIL
Low-level Input Voltage
TPSON
Timing PSON to On/Off
On (PSON Low to FPO Low)
Off (PSON High to PGO Low)
34
34
TPSOFF
Timing PGO Low to FPO High
V
0.8
V
48
48
67
67
mS
1.6
2.8
4.5
mS
Over Temperature Section
Symbol
Parameter
Min.
Typ.
Max.
Unit
VTH
Over Temperature Threshold
2.4
2.5
2.6
V
VHYST
Hysteresis
0.18
0.23
V
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
Test Conditions
-8-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
TYPICAL CHARACTERISTICS
Ratio of C urrent S ense S ink C urrent to RI P in
S upply C urrent (IDD1) vs Temperature
S ource C urrent (IR E F ) vs Temperature
2.1
8.4
2.0
8.3
8.2
8.1
1.8
IREF
IDD1 (mA)
1.9
1.7
8.0
7.9
1.6
7.8
1.5
7.7
7.6
1.4
-40
-25
-10
5
20
35
50
65
80
95
110
-40
125
-25
-10
5
20
35
50
65
80
95
110
125
110
125
Temperature (℃ )
Temperature (℃ )
OC P C omparator Input Offset Voltage (V O F F S E T ) vs
OC P Delay Time (T O C P ) vs Temperature
3
24
2
22
1
20
T O C P (mS )
V O F F SE T (mV)
Temperature
0
-1
-2
18
16
14
-3
12
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
-25
-10
5
20
Temperature (℃ )
RI Pin Voltage (V R I) vs Temperature
50
65
80
95
Input Threshold Voltage (V PG I) vs Temperature
1.30
1.30
1.28
1.28
1.26
1.26
V PG I (V)
V RI (V)
35
Temperature (℃ )
1.24
1.22
1.24
1.22
1.20
1.20
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
Temperature (℃ )
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
-25
-10
5
20
35
50
65
80
95
110
125
Temperature (℃ )
-9-
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
APPLICATION NOTE
Over Current Protection (OCP)
The sink currents of IS33, IS5, IS12 and IS12B are 8
times the current at the RI pin. The current at the RI pin
is VRI/Ri. Here is an example demonstrating how to set
the over current protection.
The SG6520 provides over current protection for the
3.3V, 5V and two 12V rails. Whenever an OCP
condition occurs at any of the voltage rails, PGO will be
low and FPO will be open. The internal OCP
comparators have a very small offset voltage (±5mV).
If I1*R1>(IRI*8)*R2, than OCP active.
How to select R2 Resistor:
If R1 =5mΩ, Ri=30K, OCP Protection Level is 35A, than
R2 = (I1*R1)/(IRI*8)
= (35A*5mΩ)/{(1.25V/30K)*8}
= 525Ω
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
- 10 -
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
PACKAGE INFORMATION
16 PINS - DIP(D)
θ
D
9
16
E1
eB
E
8
1
A2
A
L
e
b1
A1
Dimensions:
Symbol
A
A1
A2
b
b1
D
E
E1
e
L
eB
θ°
Millimeter
Min.
Typ.
Max.
Inch
Min.
Typ.
5.334
0.381
3.175
18.669
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
6.121
2.921
8.509
0°
3.302
1.524
0.457
19.177
7.620
6.299
2.540
3.302
9.017
7°
0.210
3.429
0.015
0.125
19.685
0.735
6.477
0.241
3.810
9.525
15°
0.115
0.335
0°
- 11 -
Max.
0.130
0.060
0.018
0.755
0.300
0.248
0.100
0.130
0.355
7°
0.135
0.775
0.255
0.150
0.375
15°
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
16 PINS - SOP(S)
16
9
E
1
H
Detail A
F
8
c
b
e
θ
D
A2
A
L
y
Detail A
A1
Dimension:
Symbol
Millimeter
Min.
Typ.
A
A1
A2
b
c
D
E
e
H
L
F
y
θ°
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
1.346
0.101
1.244
Max.
1.753
0.254
1.499
Inch
Min.
Typ.
0.053
0.004
0.049
0.406
0.203
9.804
3.810
10.008
3.988
0.386
0.150
6.198
1.270
0.228
0.016
0.394
0.157
0.050
0.381X45°
0°
0.069
0.010
0.059
0.016
0.008
1.270
5.791
0.406
Max.
0.244
0.050
0.015X45°
0.101
8°
- 12 -
0°
0.004
8°
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September 28, 2007
Product Specification
SG6520
PC Power Supply Supervisors
© System General Corp.
Version 1.0.1 (IAO33.0041.B0)
- 13 -
www.sg.com.tw • www.fairchildsemi.com
September 28, 2007