SG2543 [MICROSEMI]
POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT; 电源输出监控电路
| 型号： | SG2543 |
| 厂家： | 
Microsemi |
| 描述： | POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT |
| 文件： | 总6页 (文件大小：121K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SG1543/SG2543/SG3543
POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT
DESCRIPTION
FEATURES
• Over-voltage, under-voltage, and
current sensing circuits all
included
• Reference voltage trimmed to 1%
accuracy
• SCR "Crowbar" drive of 300mA
• Programmable time delays
• Open-collector outputs and
remote activation capability
• Total standby current less than
10mA
This monolithic integrated circuit contains all the functions necessary to monitor and
control the output of a sophisticated power supply system. Over-voltage (O.V.) sensing
with provision to trigger an external SCR “crowbar” shutdown; an under-voltage (U.V.)
circuit which can be used to monitor either the output or to sample the input line voltage;
and a third op amp/comparator usable for current sensing (C.L.) are all included in this
IC, together with an independent, accurate reference generator.
Both over and under-voltage sensing circuits can be externally programmed for mini-
mum time duration of fault before triggering. All functions contain open collector outputs
which can be used independently or wire-ORed together; and although the SCR trigger
is directly connected only to the over-voltage sensing circuit, it may be optionally
activated by any of the other outputs, or from an external signal. The O.V. circuit also
includes an optional latch and external reset capability.
HIGH RELIABILITY FEATURES
- SG1543
The current sense circuit may be used with external compensation as a linear amplifier
or as a high gain comparator. Although nominally set for zero input offset, a fixed
threshold may be added with an external resistor. Instead of current limiting, this circuit
may also be used as an additional voltage monitor.
♦ Available to MIL-STD-883 and
DESC SMD
♦ LMI level "S" processing avail-
able
The reference generator circuit is internally trimmed to eliminate the need for external
potentiometersandtheentirecircuitmaybepowereddirectlyfromeithertheoutputbeing
monitored or from a separate bias voltage.
BLOCK DIAGRAM
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
1
(714) 898-8121 ∞ FAX: (714) 893-2570
SG1543/SG2543/SG3543
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (+VIN)................................................. 40V
Sense Inputs ...................................................................... +VIN
SCR Trigger Current (Note 2) ......................................... 300mA
Indicator Output Voltage ..................................................... 40V
Indicator Output Sink Current .......................................... 50mA
Operating Junction Temperature
150°C
Hermetic (J, L Packages) ............................................
Plastic (N, DW Packages) ........................................... 150°C
-65°C to 150°C
Storage Temperature Range ............................
Note 1. Values beyond which damage may occur.
Note 2. At higher input voltages, a dissipation limiting resistor, RG , is required. See Figure 1.
THERMAL DATA
J Package:
Note A. Junction Temperature Calculation: TJ = T + (PD x θJA).
Thermal Resistance-Junction to Case, θJC .................. 30°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 80°C/W
N Package:
Thermal Resistance-Junction to Case, θJC .................. 40°C/W
Thermal Resistance-Junction to Ambient, θJA ............. 65°C/W
DW Package:
Thermal Resistance-Junction to Case, θJC ................... 40°C/W
Thermal Resistance-Junction to Ambient, θJA ............. 95°C/W
L Package:
Note B. The above numbers for θJC are maximuAms for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The θJA numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
Thermal Resistance-Junction to Case, θJC .................. 35°C/W
Thermal Resistance-Junction to Ambient, θJA ............ 120°C/W
RECOMMENDED OPERATING CONDITIONS (Note 3)
Input Supply Voltage (+VIN) .................................... 4.7V to 40V
Current Limit Common Mode
Delay Timing Capcitor (Note 4) ..................................... 0 to 1µF
Operating Ambient Temperature Range
Input Voltage Range ....................................... 0V to +V -3V
SG1543 ......................................................... -55°C to 125°C
SG2543 ........................................................... -25°C to 85°C
SG3543 .............................................................. 0°C to 70°C
IN
Reference Load Current ........................................... 0 to 10mA
Indicator Output Voltage ......................................... 4.7V to 40V
Indicator Output Current ........................................... 0 to 10mA
Note 3: Range over which the device is functional.
Note 4. Larger value capacitor may be used with peak current limiting. See Figure 7.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1543 with -55°C ≤ TA ≤ 125°C, SG2543 with
-25°C ≤ TA ≤ 85°C, SG3543 with 0°C ≤ TA ≤ 70°C, and +VIN = 10V. Indicator outputs have 2KΩ pull-up resistor. Low duty cycle testing techniques are
used which maintains junction and case temperatures equal to the ambient temperature.)
SG1543/2543
SG3543
Parameter
Supply Section
Test Conditions
Units
Min. Typ. Max. Min. Typ. Max.
Input Voltage Range
TJ = 25°C to TMAX
4.5
4.7
40 4.5
40 4.7
10
40
40
10
V
V
mA
Supply Current
+V = 40V, Outputs open, TJ = 25°C
7
7
IN
Reference Section
Output Voltage
TJ = 25°C
2.48 2.50 2.52 2.45 2.50 2.55
V
V
mV
mV
mA
%/°C
2.45
2.55 2.40
5
10
2.60
5
10
40
Line Regulation
Load Regulation
Short Circuit Current
Temperature Stability
+V = 5 to 30V
1
1
1
1
IN
I
= 0 to 10mA
REF
VREF = 0V
12
25
.005
40
12
25
.005
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 FAX: (714) 893-2570
2
∞
SG1543/SG2543/SG3543
ELECTRICAL CHARACTERISTICS (continued)
SG1543/2543
Min. Typ. Max. Min. Typ. Max.
SG3543
Parameter
Test Conditions
Units
Comparator Section
Input Threshold (Note 5)
TJ = 25°C
2.45 2.50 2.55 2.40 2.50 2.60
V
V
2.40
2.60 2.35
2.65
Input Hysteresis
25
0.3 1.0
0.2 0.5
6
25
0.3 1.0
0.2 0.5
6
mV
µA
V
V
µA
Input Bias Current
Delay Saturation
Delay High Level
Delay Charging Current
Indicate Saturation
Indicate Leakage
Propagation Delay
Sense input = 0V
8
8
VD = 0V
IL = 10mA
VIND = 40V
200 250 300 200 250 300
0.2 0.5
.01 1.0
0.2 0.5
0.1 1.0
V
µA
V
O.V. INPUT = 2.7V, VU.V. INPUT = 2.3V, TJ = 25°C
C = 0
CD = 1µF
400
10
400
10
ns
ms
D
SCR Trigger Section
Peak Output Current
Peak Output Voltage
Output Off Voltage
Remote Activate Current
Remote Activate Voltage
Reset Current
+V = 5V, RG = 0, VO = 0
100 200
400 100 200 400
mA
V
V
mA
V
mA
V
mA/µs
ns
IN
+V = 15V, IO = 100mA
12
13
0
12
13
IN
+V = 40V, RL = 1KΩ
0.1
0
0.4
2
0.4 0.8
2
0.1
0.8
6
IN
REM. ACT. pin = Gnd
REM. ACT pin open
RESET pin = Gnd, REM. ACT. = Gnd
RESET pin open, REM. ACT. = Gnd
RL = 50Ω, TJ = 25°C, CD = 0
VREM. ACT. = 0.4V
0.4 0.8
2
0.4
2
400
300
500
6
0.8
6
Reset Voltage
6
Output Current Rise Time
Prop. Delay from REM. ACT. Pin
Prop. Delay fom O.V. INPUT Pin
400
300
500
V
O.V. INPUT = 2.7V
ns
Current Limit Section
Input Voltage Range
Input Bias Current
VIN-3V
0.3 1.0
10
0
0
VIN-3V
0.3 1.0
15
V
µA
mV
mV
dB
dB
V
µA
MHz
ns
OFFSET/COMP pin open, VCM = 0V
OFFSET/COMP pin open, VCM = 0V,
Input Offset Voltage
0
0
10kΩ from OFFSET/COMP pin to Gnd,TJ =25°C 80 100 120 70 100 130
CMRR
AVOL
Output Saturation
Output Leakage
Small Signal Bandwidth
Propagation Delay
0 ≤ VCM ≤ 12V, VIN = 15V
OFFSET/COMP pin open, VCM = 0V
IL = 10mA
60
72
70
80
60
72
70
80
0.2 0.5
.01 1.0
5
0.2 0.5
.01 1.0
5
VIND = 40V
AV = 0dB, TJ = 25°C
VOVERDRIVE = 100mV, TJ = 25°C
200
200
Note 5. Input voltage rising on O.V. Input and falling on U.V. Input.
CHARACTERISTIC CURVES
FIGURE 2 .
ACTIVATION DELAY VS. CAPACITOR VALUE
FIGURE 1.
SCR TRIGGER POWER LIMITING
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
3
(714) 898-8121 ∞ FAX: (714) 893-2570
SG1543/SG2543/SG3543
CHARACTERISTIC CURVES (continued)
FIGURE 3.
FIGURE 4.
CURRENT LIMIT INPUT THRESHOLD
COMPARATOR INPUT HYSTERESIS
FIGURE 6.
FIGURE 5.
CURRENT LIMIT AMPLIFIER GAIN
CURRENT LIMIT AMPLIFIER FREQUENCY RESPONSE
APPLICATION INFORMATION
FIGURE 7 - SURGE LIMIT CIRCUIT FOR LARGE DELAY CAPACITORS
FIGURE 8 - INPUT LINE MONITOR
The 100 ohm resistor limits the peak discharge current into the
SG1543 while the external PNP transistor provides a high peak-
current discharge path for the delay capacitor.
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 FAX: (714) 893-2570
4
∞
SG1543/SG2543/SG3543
APPLICATION INFORMATION (continued)
The values for the external components are
determined as follows:
1000
Current limit input threshold, VTH
≈
R1
CS is determined by the current loop dynamics
VTH
RSC
VTH
RSC
VO
RSC
R2
R2+R3
+
Peak current to load, IP ≈
Short circuit current, ISC
(
)
=
2.5 (R4+R5+R6)
R5+R6
Low output voltage limit, VO (Low) =
2.5 (R4+R5+R6)
High output voltage limit, VO (High) =
Voltage sensing delay, tD = 10,000 CD
R6
FIGURE 9 - TYPICAL APPLICATION CIRCUIT
VIN - 5
0.2
SCR trigger power limiting resistor, RG >
FIGURE 10 - SENSING MULTIPLE SUPPLY VOLTAGES
FIGURE 11 - OVERCURRENT SHUTDOWN
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
5
(714) 898-8121 ∞ FAX: (714) 893-2570
SG1543/SG2543/SG3543
CONNECTION DIAGRAMS & ORDERING INFORMATION (See Notes Below)
Ambient
Temperature Range
Package
Part No.
Connection Diagram
16-PIN CERAMIC DIP
J - PACKAGE
SG1543J/883B
SG1543J/DESC
SG1543J
SG2543J
SG3543J
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
S.C.R. TRIGGER
16
+VIN
VREF
1
2
3
REMOTE ACTIVATE
RESET
15
14
13
GROUND
O.V. INDICATE
O.V. DELAY
4
5
6
7
C.L. OUTPUT
OFFSET/COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
12
11
10
9
O.V. INPUT
U.V. INPUT
U.V. DELAY
16-PIN PLASTIC DIP
N - PACKAGE
SG2543N
SG3543N
-25°C to 85°C
0°C to 70°C
8
16-PIN WIDE BODY
PLASTIC S.O.I.C.
DW - PACKAGE
SG2543DW
SG3543DW
-25°C to 85°C
0°C to 70°C
S.C.R. TRIGGER
REMOTE ACTIVATE
RESET
16
15
14
13
12
1
2
3
4
5
6
7
8
+VIN
VREF
GROUND
O.V. INDICATE
O.V. DELAY
C.L. OUTPUT
OFFSET/COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
11
10
O.V. INPUT
U.V. INPUT
U.V. DELAY
9
20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE
SG1543L/883B
SG1543L
-55°C to 125°C
-55°C to 125°C
3
2
1
20 19
1. N.C.
11. N.C.
2. SCR TRIGGER
3. REMOTE ACTIVATE
4. RESET
5. O.V. INDICATE
6. N.C.
7. O.V. DELAY
8. O.V. INPUT
9. U.V. INPUT
10. U.V. DELAY
12. U.V. INDICATE
13. C.L. INV. INPUT
14. C.L. N.I. INPUT
15. OFFSET/COMP
16. N.C.
17. C.L. OUTPUT
18. GROUND
19. VREF
4
18
(Note 3)
5
6
7
8
17
16
15
14
20. +VIN
9
10 11 12 13
Note 1. Contact factory for JAN and DESC product availablity.
2. All packages are viewed from the top.
3. Consult factory for product availability.
11/91 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright 1994
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 FAX: (714) 893-2570
6
∞
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