SG6105DZ [ETC]
Power Supply Supervisor Regulator PWM;
| 型号： | SG6105DZ |
| 厂家： | 
ETC |
| 描述： | Power Supply Supervisor Regulator PWM |
| 文件： | 总13页 (文件大小：520K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
FEATURES
DESCRIPTION
ꢀ
PC half-bridge (or 494) power supply supervisor +
two 431 + PWM
SG6105 controller is designed for switching mode
power supply for desktop PCs. It provides all the
functions necessary to monitor and control the output of
the power supply. Remote ON/OFF control, power good
circuitry, some protection features against over-voltage
and over-power are implemented. It directly senses all the
output rails for OVP without the need of external dividers.
An innovated AC-signal sampling circuitry provides a
sufficient power-down warning signal for PG. A built-in
timer generates accuracy timing for control circuit
including the PS-off delay. The cycle-by-cycle PWM
switching prevents the power transformer from the
saturation and ensures the fastest response for the
short-circuit protection which greatly reduce the stress for
power transistors. Two internal precision TL431 shunt
regulators provide stable reference voltage and driver for
3.3V and 5V-standby regulation. Utilizing minimum
number of external components, the SG6105 includes all
of the functions for push-pull and/or half-bridge topology,
decreasing the production cost and PCB space, and
increasing the MTBF for power supply.
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High integration & few external components
Over-voltage protection for 3.3V, 5V and 12V
Under-voltage protection for 3.3V, 5V and 12V
Under-voltage protection for –12V and/or –5V
Over-power and short-circuit protection
Power-down warning circuitry
Power good circuitry
Delay time for PSON and PG signal
Remote ON/OFF function
On-chip oscillator and error amplifier
Two shunt regulator for 3.3V and 5V-Standby
Latching PWM for cycle-by-cycle switching
Push-pull PWM operation and totem pole outputs
Soft-start and maximum 93% duty cycle
APPLICATIONS
Switching mode power supply for Computers, such
as:
ATX
NLX
SFX (micro-ATX)
MARKING DIAGRAMS
PIN CONFIGURATION
20
PSON
V33
V5
1
2
20
19
VCC
RI
SG6105T
18
3
4
SS
XXXXXXXYYWWV
17
16
IN
OPP
UVAC
NVP
V12
1
5
COMP
15
14
13
12
11
6
GND
FB1
7
T: D = DIP
8
OP2
OP1
PG
VREF1
VREF2
FB2
XXXXXXX: Wafer Lot
YY: Year; WW: Week
V: Assembly Location
9
10
©System General Corp.
- 1 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
ORDERING INFORMATION
Part Number
Package
SG6105D
20-Pin DIP
PIN DESCRIPTIONS
Name
Pin Type
Function
VCC
20
Supply
Supply voltage. 4.5V ~ 5.5V. It is connected to 5V-standby.
Power Good logic output, 0 or 1 (open-collector). PG = 1 means that the power is good for operation.
The PG delay is 300 msec.
PG
10
Logic output
V33
V5
V12
2
3
7
Analog input
Analog input
Analog input
3.3V over-voltage/under-voltage control sense input.
5V over-voltage/under-voltage control sense input.
12V over-voltage/under-voltage control sense input.
Over-power sense input. This pin is connected to driver transformer or the output of current
transformer. When not in use, this pin should be grounded.
Remote On/Off logic input for CPU or controller. Turn on/off the PWM Output after the 7.5 msec / 26
msec delay.
OPP
4
Analog input
PSON
1
Logic input
PSON = 0 means that the main SMPS is operational.
PSON =1 means that the main SMPS is off and the latch is reset.
The protection input for negative output, such as –12V and/or –5V. Trip voltage = 2.1V.
AC fail detection, detect main AC voltage under-voltage and/or failure.
Error amplifier output and the input of the PWM comparator.
The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference voltage.
The soft-start. It is settable through external capacitor. The current source output at this pin is 8uA and
the voltage is clamped at 2.5V.
The totem-pole output drivers of push-pull PWM. The output are enabled (low) only when the NAND
gate inputs are high, the maximum duty cycle on an output (OP1 or OP2) is 46%.
Output for first converter regulation loop.
Reference comparison input for first converter regulation loop. 2.5V.
Output for second converter regulation loop.
Reference comparison input for second converter regulation loop. 2.5V.
Connected to external resistor for the reference setting.
RI = 75k ohms.
NVP
UVAC
COMP
IN
6
5
16
17
Analog input
Analog input
Analog output
Analog input
SS
18
Analog input
Analog output
OP1/OP2
9/8
FB1
VREF1
FB2
14
13
11
12
Analog output
Analog input
Analog output
Analog input
Program.
VREF2
RI
19
15
Analog input
Supply
GND
Ground.
©System General Corp.
- 2 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
BLOCK DIAGRAM
V33
2
V5
3
V12
7
UVAC
5
RI
19
PG
10
GND
15
VCC
20
DSD
2uA
Vref
14
13 VREF1
FB1
UV
Detector
COMP
_
+
0.7V
Delay
300msec
OV
Protector
11
12 VREF2
FB2
Delay
3sec
UV
Protector
COMP
_
+
5V
3.2V
64uA
COMP
COMP
_
+
2.1V
2.4V
Vcc
Delay
7msec
2.5V
Buffer
6
4
NVP
OPP
D
Q
_
9
8
OP1
OP2
8uA
D
Q
_
Q
CK
_
+
+
CK
Delay
7msec
COMP
Buffer
R
+
_
O.S.C
Error
Amp
Delay
Vcc
15msec
COMP
_
+
S
R
Q
On/Off Delay
26msec
7.5msec
1.4V
Delay
2msec
1
PSON
18
17
IN
16
COMP
SS
©System General Corp.
- 3 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
TIMING DIAGRAM
VCC
PSON
3.3V,5V,12V
tPSON(ON)
tUVP
NVP
tPSON(OFF)
tNVP
SS(on/off)
tPSOFF
PG
tPG
VCC
PSON
Voltage < VUVAC
UVAC
OPP
tOPP
SS(on/off)
PG
©System General Corp.
- 4 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VFB
IOUT
PD,25
PD,90
TSTG
RθJA
Parameter
Value
16
16
30
1.5
0.5
-55 to +150
82.5
150
Unit
V
V
mA
W
W
DC Supply Voltage at Pin 20
Shunt Regulator Output at Fb1, Fb2 Pins
Output Current at PG, Fb1, Fb2 Pins
Power Dissipation (TA=25
Power Dissipation (TA=90
Storage Temperature Range
Thermal Resistance, Junction-To-Air
Operating Junction Temperature
Operating Ambient Temperature
Lead Temperature (Soldering, 10sec)
ESD Capability, HBM model
)
)
/W
kV
TJ,MAX
TA,MAX
TL
-30 to +125
260
3.0
Note: All voltage values, except differential voltage, are with respect to network ground terminal.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VFB
TOPER
Parameter
Value
4.5 to 5.5
4 to 16
Unit
V
V
DC Supply Voltage at Pin 20
Shunt Regulator Output at Fb1, Fb2 Pins
Operating Ambient Temperature Range
-25 to +85
ELECTRICAL CHARACTERISTICS (VCC = 5V, TA = 25°C)
Symbol
ICC
Parameter
Total Supply Current
Over-Voltage Protection 3.3V
Over-Voltage Protection 5V
Over-Voltage Protection 12V
Under-Voltage Protection 3.3V
Under-Voltage Protection 5V
Under-Voltage Protection 12V
Under-Voltage Sense 3.3V for PG Low
Under-Voltage Sense 5V for PG Low
Under-Voltage Sense 12V for PG Low
Over-Power Protection.
Negative Voltage Protection: Voltage Level
Negative Voltage Protection: Source Current
Timing for Over-Voltage Protection
Timing for Under-Voltage Protection
Timing for Under-Voltage Sense for PG Low
Timing for Over-Power-Protection
Timing for Negative Voltage Protection
Test Condition
PG High
-
-
-
-
-
-
Min.
-
Typ.
5
Max.
10
4.3
6.5
14.9
2.8
3.9
8.0
3.0
4.5
Unit
mA
V
V
V
V
V
V
V
V
V
V
V
uA
ms
ms
ms
ms
ms
VOVP1
VOVP2
VOVP3
VUVP1
VUVP2
VUVP3
VUVS1
VUVS2
3.9
5.8
13.9
2.0
3.0
6.0
2.5
4.0
9.4
2.02
2.0
57
0.37
0.8
0.37
3.3
3.3
4.1
6.1
14.5
2.6
3.6
7.2
2.8
4.3
10.1
2.4
2.1
64
-
-
-
VUVS3
10.4
2.66
2.2
1
VOPPS
VNVP
INVP
tOVP
tUVP
tUVS
tOPP
*
VUVAC = 1.5V
-
RI = 75kΩ
RI = 75kΩ
RI = 75kΩ
RI = 75kΩ
RI = 75kΩ
RI = 75kΩ
72
0.7
2.4
1.2
7
1.35
3.75
1.88
11.3
10.2
tNVP
7
Note *1: VOPPS = (2/3) x VOPP + (1/3) x VUVAC
;
©System General Corp.
- 5 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
Shunt Regulator (FB1, VREF1, FB2, VREF2)
Symbol
Parameter
Reference Voltage
Deviation of VREF Over Load Current
Deviation of VREF Over Temperature
Line Regulation
Test Condition
IFB = 0.5mA, TA = 25
IFB = 0.5mA to 10mA
TA = -25 to 85
4 < VFB < 16V
Min.
2.475
-
-
-
10
Typ.
2.5
-
10
1
-
Max.
2.525
20
30
-
Unit
V
mV
mV
mV/V
mA
VREF
VDEV, I
VDEV, T
REGLI-FB
*2
* 2
*2
*2
IOUT-FB
Output Sinking Current Capability
VFB > 2V
-
Note *2: Not tested in production test.
Power Good Section
Symbol
tPG
Parameter
Timing for PG Delay
Test Condition
RI = 75kΩ
-
CL = 100pF
CL = 100pF
IPG = 5mA
VPG = 5V
Min.
200
0.65
-
-
-
-
Typ.
300
0.7
1
300
-
Max.
Unit
ms
V
us
ns
400
0.75
-
-
0.5
1
VUVAC
UVAC Voltage Sense for PG
PG Good Output Rising Time
PG Good Falling Time
Power Good Output Saturation Level
Power Good Leakage Current Collector
*2
tR
tF
*2
VOL2
ION2
V
uA
-
Remote On/Off
Symbol
VPSON
IPSON
Parameter
Test Condition
-
-
Min.
1
-
Typ.
1.4
-
Max.
2.0
0.5
Unit
V
mA
PSON Input Threshold Level
Remote Input Driving Current
Timing PSON to On/Off
On
Off (PS-off)
Timing PG low to Power Off
tPSON(ON)
tPSON(OFF)
tPSOFF
RI = 75kΩ
RI = 75kΩ
17
5
1.5
26
7.5
2
45
28.8
6.3
ms
ms
Error Amplifier
Symbol
Parameter
Reference Voltage
Input Bias Current
Open-Loop Voltage Gain
Unity Gain Bandwidth
Power Supply Rejection Ratio
Test Condition
Min.
2.45
-
50
0.3
50
Typ.
2.5
-
60
1
-
Max.
2.55
0.1
-
-
-
Unit
V
uA
dB
MHz
dB
V2.5
-
-
-
-
-
*2
IIB
* 2
AVOL
BW * 2
PSRR * 2
Oscillator Section
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
FOSC
PWM Frequency
RI = 75kΩ
60
65
70
KHz
Soft-Start Section
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
ISS
Charge Current
RI = 75kΩ
6
8
9.3
uA
©System General Corp.
- 6 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
Comparator Section
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DC
Duty Cycle
-
85
-
93
%
PWM Output Section (OP1, OP2)
Symbol
VOL
VOH
RO
Parameter
Test Condition
Min.
-
4
1.5
Typ.
Max.
0.5
-
Unit
V
V
Output Voltage Low
Output Voltage High
Output Impedance of VOH
Io = 5mA
V12 = 12V
-
-
-
-
3.3
kΩ
©System General Corp.
- 7 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
APPLICATION 1
-12V
12V
5V
+
+
+
+
MAIN
Transformer
3.3V
UVAC
V33
V5
3.3V
V12
VCC
5Vsb
VREF2
5Vsb
47~100ohm
Pok
STBY
Transformer
PG
FB2
1Kohm
PSON
PSon
-12V
-5V
VREF1
+
NVP
FB1
OP1
RI
GND
5V
Vdd
IN
12V
COMP
SS
OP2
OPP
©System General Corp.
- 8 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
APPLICATION 2
OPP
R61
C39
CN2
R62
F2
OP1
C40
D26
D27
C45
R63
1
2
2
1
3
R64
Q12
D28
L11
L12
5
6
7
8
U4
SG6848
1
1
RI NC FB GND
R65
D30
C42
D29
3
4
1
2
SEN NC VDDGate
T5
C78
4
3
2
1
R66
R67
R71
HHV
Q13
OP2
3
R68
C44
R69
C48
C46
D31
T6
9
D32
C47
1
3
Q14
6
R70
2
D33
TR2
BD1
3
D35
D34
R74
U5
T7
E16-D
+
+
2
C49
C50
R75
D37
D38
R73
R77
R78
R76
R83
C51
C52
C53
C54
R82
VZ4
R79
R80
FB1
C55
R81
R84
R85
VREF1
3
2
3
2
VZ3
Q15
Q16
R86
C56
L13
1
2
2
1
2
1
D39
D40
C57
2
1
2
1
HHV
R87
C58
C59 R88
D41
5VSB
T8
C60
UVAC
C69
V5
R89
R104
R103
U6
D45
D46
1
20
19
18
17
16
15
14
13
12
11
C61
PSON
3.3V
5V
PSON
VCC
RI
R90
2
3
V33
C62
V5
SS
R91
R94
-5V
-12V
4
OPP
OPP
UVAC
NVP
V12
IN
5V
C63
R93
D42
5
R92
UVAC
COMP
GND
FB1
12V
C64
R95
R96
6
R97
L14
D43 D44
7
R98
R99
C66
12V
OP2
FB1
VREF1
VREF2
FB2
VR3
2
8
OP2
OP1
PG
VREF1
VREF2
FB2
C65
Q18
Q17
9
OP1
R100
10
D48
SG6105
R101
C67
R102
C68
Q19
PG
L15
D47
1
2
C70
V5
R107
L16
FB2
L18
L17
C79
R112
Q20
3
1
C71
2
C73
C72
-12V
L19
+
R113
C75
R111
C74
R110
L20
R115
VREF2
C76
5V
12V
U7
LM7905
R116
1
GND
R105
R106
R109
3.3VSENCE
C77
3.3V
-5V
©System General Corp.
Version 2.3(IRO33.0011.B0)
- 9 -
www.sg.com.tw
June 19, 2003
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
threshold level. PG pin goes high when the above
condition is reached. A 2K pull up resistor may connect to
5V.
Example of Using SG6105 for the ATX
Power Supply
ꢀ
The VCC can be supplied from the 5V-standby.
When the VCC voltage is higher than 7V, besides the
shunt regulator, the circuit of SG6105 will be
shutdown and reset. No extra power supply is
needed.
Protection against over-voltage, short-circuit and
fault conditions is mandatory in PC power supplies. These
protection circuits can be realized by using many discrete
components and comparators, which occupy a lot of PCB
space and also add to assembling costs. This single chip
controller IC provides complete protection circuits, shunt
regulators, and PWM control function and with less
number of components. SG6105 is an ideal controller IC
for PC switching mode power supplies.
ꢀ
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Two internal high precision 431 shunt regulators are
built-in. It provides stable reference voltages.
Complete PWM control circuitry including the error
amplifier for push-pull or half-bridge operation.
The features and benefits of this device are listed
below:
Supervisory Circuit Operation
The PC generates the remote ON/OFF logic (PSON),
which is “Low” for power supply “On” and “High” to
switch off the power supply. The remote ON/OFF is
connected to PSON input.
ꢀ
Over-voltage and under-voltage protection for 3.3V,
5V and 12V without external divider
Over-power protection.
UV protection for –12V and/or –5V.
Power-down warning for power good signal.
Power good signal and power-fail lockup
Remote on/off control.
Delay time for PSON and PS-off signal.
Two shunt regulator for 3.3V and 5V-Standby
regulation.
Complete pulse width modulation (PWM) control
circuitry.
On-chip oscillator.
Programmable Soft-Start.
Maximum 93% duty cycle
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APPLICATION GUIDES
Introduction
The application guide shows the key-feature of
SG6105 and illustrates how to use in an ATX switching
mode power supply (SMPS). SG6105 is suitable for
half-bridge, push-pull topology. It incorporates with a
4-channel supervisor, including 5V-standby. The PWM
section of SG6105 comprises a built-in 65kHz oscillator
and high immunity circuits, which protect the system
from noise interference and provide more noise margins
for improper PCB layout. SG6105 has OVP and UVP for
12V, 5V and 3.3V. Besides, the NVP is used for negative
voltage protection, such as –12V and/or –5V. The UVAC
(AC fails detection) is applied to detect AC line condition.
Two built-in internal precision TL431 shunt regulators
can be used for 3.3V or 5V auxiliary standby power.
ꢀ
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ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Few external components
More reliable system
Little space on PCB
Easy trouble-shooting and implementation
FEATURE DESCRIPTIONS
ꢀ
ꢀ
ꢀ
Over voltage protection can be implemented without
any additional components. Over-voltage sense
Levels or 3.3V, 5V, 12V are 4.1V, 6.1V, 14.5V
respectively.
Over current and/or short circuit protection can also
be achieved by using over-power protection, in
which OPP pin is connected to the current
transformer (driver transformer).
AC Fails Detection
Through a resistor divider, UVAC is connected to
the secondary power transformer for detecting the AC line
condition. Once the voltage of UVAC is lower than 0.7V
for a period of time, such as 200usec, the PG (power good)
signal will be pulled low to indicate an AC line
power-down condition. The voltage amplitude of the
The power good signal is asserted to indicate the
3.3V, 5V and 12V is above the under voltage
©System General Corp.
- 10 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
PWM switching signal in the secondary power
transformer is proportional to the AC line voltage. Adjust
the ratio of resistor divider to decide the threshold of
power-down warning. A small capacitor is connected
from UVAC to ground for filtering the switching noise.
Negative Voltage Protection
The NVP provides an UVP (under voltage protection)
for negative voltage outputs. An under-voltage represents
the phenomenal of the overload condition in negative
voltage output. For example, the –12V output may drop
to –10V during the overload situation. A resistor
determining the threshold of the protection is connected
from pin NVP to the negative voltage output. Via this
resistor, NVP outputs a 64uA constant current to the
negative voltage output. When the NVP voltage is over
2.1V and the situation kept for longer than 7 msec, 6105
will lock the power outputs off.
VS
Vo
Vin
R1
+
UVAC
R2
C1
0.7V
VNVP = 64 uA × (R1 + R2) – V-12V
Over Power Protection (OPP)
The power outputs will be locked off when VNVP ≥
2.1V.
The OPP (over power protection) is used for
detecting over power and/or short-circuit conditions.
When OPPS voltage (p.4, Note-1) is higher than 2.1V and
this situation existed for longer than 7 msec, 6105 will
pull the PG low and lock off the power outputs.
64uA
R1
R2
+
-12V
-5V
OP1
2.1V
Vdd
OP2
R1
R2
OPP
C1
R3
©System General Corp.
- 11 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
MECHANICAL DIMENSIONS
20 PINS – DIP (D)
D
11
20
1
B
e
E1
A2
E
10
A
L
e
b1
A1
b
Dimension
Min.
Min.
Symbol
Typ.
Max.
Typ.
Max.
A
5.334
0.210
A1
A2
b1
D
E
E1
e
0.381
3.175
0.015
0.125
3.302
1.524
0.457
26.162
7.620
6.350
2.540
3.302
9.017
7
3.429
0.130
0.060
0.018
1.030
0.300
0.250
0.100
0.130
0.355
7
0.135
24.892
6.223
26.924
6.477
0.980
0.245
1.060
0.255
L
e
θ˚
2.921
8.509
0
3.810
9.525
15
0.115
0.335
0
0.150
0.375
15
©System General Corp.
Version 2.3(IRO33.0011.B0)
- 12 -
www.sg.com.tw
June 19, 2003
Product Specification
Power Supply Supervisor + Regulator + PWM
SG6105
DISCLAIMERS
LIFE SUPPORT
System General’s products are not designed to be used as components in devices intended to support or sustain
human life. Use of System General’s products in components intended for surgical implant into the body, or other
applications in which failure of the System General’s products could create a situation where personal death or injury may
occur, is not authorized without the express written approval of System General’s Chief Executive Officer. System
General will not be held liable for any damages or claims resulting from the use of its products in medical applications.
MILITARY
System General's products are not designed for use in military applications. Use of System General’s products in
military applications is not authorized without the express written approval of System General’s Chief Executive Officer.
System General will not be held liable for any damages or claims resulting from the use of its products in military
applications.
RIGHT TO MAKE CHANGES
System General reserves the right to change this document and/or this product without notice. Customers are advised
to consult their System General sales representative before ordering.
©System General Corp.
- 13 -
www.sg.com.tw
June 19, 2003
Version 2.3(IRO33.0011.B0)
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