MICROSEMI SG3543

SG1543/SG2543/SG3543
POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT
DESCRIPTION
FEATURES
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.
• 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
Both over and under-voltage sensing circuits can be externally programmed for minimum 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.
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.
HIGH RELIABILITY FEATURES
- SG1543
♦ Available to MIL-STD-883 and
DESC SMD
♦ LMI level "S" processing available
The reference generator circuit is internally trimmed to eliminate the need for external
potentiometers and the entire circuit may be powered directly from either the output being
monitored or from a separate bias voltage.
BLOCK DIAGRAM
Rev 1.1a 3.19.2005
Copyright  1994
Microsemi Inc.
1
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
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 ..........................................
Operating Junction Temperature
Hermetic (J, L Packages) ............................................
Plastic (N, DW Packages) ...........................................
Storage Temperature Range ............................ -65°C to
Note 1. Values beyond which damage may occur.
Note 2. At higher input voltages, a dissipation limiting resistor, RG , is required. See Figure 1.
50mA
150°C
150°C
150°C
RoHS Peak package Solder Reflow Temp. (40 sec. max. exp.)..... 260°C (+0. -5)
THERMAL DATA
J Package:
Thermal Resistance-Junction to Case, θ JC .................. 30°C/W
Thermal Resistance-Junction to Ambient, θ JA .............. 80°C/W
N Package:
Thermal Resistance-Junction to Case, θ JC .................. 40°C/W
Thermal Resistance-Junction to Ambient, θ JA ............. 65°C/W
DW Package:
Thermal Resistance-Junction to Case, θ JC ................... 40°C/W
Thermal Resistance-Junction to Ambient, θ JA ............. 95°C/W
L Package:
Thermal Resistance-Junction to Case, θ JC .................. 35°C/W
Thermal Resistance-Junction to Ambient, θ JA ............ 120°C/W
RECOMMENDED OPERATING CONDITIONS (Note
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θ JC are maximums for the limiting
thermal resistance of the package in a standard mounting configuration. The θ JA numbers are meant to be
guidelines for the thermal performance of the device/pcboard system. All of the above assume no ambient
airflow.
3)
Input Supply Voltage (+VIN ) .................................... 4.7V to 40V
Current Limit Common Mode
Input Voltage Range ....................................... 0V to +VIN -3V
Reference Load Current ........................................... 0 to 10mA
Indicator Output Voltage ......................................... 4.7V to 40V
Indicator Output Current ........................................... 0 to 10mA
Delay Timing Capcitor (Note 4) ..................................... 0 to 1µF
Operating Ambient Temperature Range
SG1543 ......................................................... -55°C to 125°C
SG2543 ........................................................... -25°C to 85°C
SG3543 .............................................................. 0°C to 70°C
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.)
Parameter
Supply Section
Input Voltage Range
Supply Current
Reference Section
Output Voltage
Line Regulation
Load Regulation
Short Circuit Current
Temperature Stability
Test Conditions
TJ = 25°C to TMAX
4.5
4.7
+VIN = 40V, Outputs open, TJ = 25°C
TJ = 25°C
7
40
40
10
4.5
4.7
7
40
40
10
2.48 2.50 2.52 2.45 2.50 2.55
2.45
2.55 2.40
2.60
1
5
1
5
1
1
10
10
12
25
40
12
25
40
.005
.005
+VIN = 5 to 30V
IREF = 0 to 10mA
VREF = 0V
Rev 1.1a
Copyright  1994
SG1543/2543
SG3543
Units
Min. Typ. Max. Min. Typ. Max.
2
V
V
mA
V
V
mV
mV
mA
%/°C
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
ELECTRICAL CHARACTERISTICS
(continued)
Parameter
Comparator Section
Input Threshold (Note 5)
Input Hysteresis
Input Bias Current
Delay Saturation
Delay High Level
Delay Charging Current
Indicate Saturation
Indicate Leakage
Propagation Delay
SCR Trigger Section
Peak Output Current
Peak Output Voltage
Output Off Voltage
Remote Activate Current
Remote Activate Voltage
Reset Current
Reset Voltage
Output Current Rise Time
Prop. Delay from REM. ACT. Pin
Prop. Delay fom O.V. INPUT Pin
Current Limit Section
Input Voltage Range
Input Bias Current
Input Offset Voltage
CMRR
AVOL
Output Saturation
Output Leakage
Small Signal Bandwidth
Propagation Delay
SG1543/2543
SG3543
Units
Min. Typ. Max. Min. Typ. Max.
Test Conditions
TJ = 25°C
Sense input = 0V
VD = 0V
IL = 10mA
VIND = 40V
VO.V. INPUT = 2.7V, VU.V. INPUT = 2.3V , TJ = 25°C
CD = 0
CD = 1µF
+VIN = 5V, RG = 0, VO = 0
+VIN = 15V, IO = 100mA
+VIN = 40V, RL = 1KΩ
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
VO.V. INPUT = 2.7V
2.45 2.50 2.55 2.40 2.50 2.60
2.40
2.60 2.35
2.65
25
25
0.3 1.0
0.3 1.0
0.2 0.5
0.2 0.5
6
8
6
8
200 250 300 200 250 300
0.2 0.5
0.2 0.5
.01 1.0
0.1 1.0
400
10
100
12
200
13
0
0.4
2
0.4
2
400
300
500
0
OFFSET/COMP pin open, V CM = 0V
OFFSET/COMP pin open, V CM = 0V,
10kΩ from OFFSET/COMP pin to Gnd,TJ =25°C
0 ≤ VCM ≤ 12V, VIN = 15V
OFFSET/COMP pin open, V CM = 0V
IL = 10mA
VIND = 40V
AV = 0dB, TJ = 25°C
VOVERDRIVE = 100mV, TJ = 25°C
80
60
72
400
10
400
0.1
0.8
6
0.8
6
VIN-3V
0.3
0
100
70
80
0.2
.01
5
200
100
12
1.0
10
120
200
13
0
0.4
2
0.4
2
400
300
500
0
70
60
72
0.5
1.0
ns
ms
400
mA
V
0.1
V
mA
0.8
6
V
0.8
mA
6
V
mA/µs
ns
ns
VIN -3V
0.3
0
100
70
80
0.2
.01
5
200
V
V
mV
µA
V
V
µA
V
µA
1.0
15
130
0.5
1.0
V
µA
mV
mV
dB
dB
V
µA
MHz
ns
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
Rev 1.1a
Copyright  1994
3
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
CHARACTERISTIC CURVES (continued)
FIGURE 3.
COMPARATOR INPUT HYSTERESIS
FIGURE 4.
CURRENT LIMIT INPUT THRESHOLD
FIGURE 5.
CURRENT LIMIT AMPLIFIER GAIN
FIGURE 6.
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 peakcurrent discharge path for the delay capacitor.
Rev 1.1a
Copyright  1994
4
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
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
V
V
R2
Peak current to load, IP ≈ RTH + R O
R2+R3
SC
SC
VTH
Short circuit current, ISC = R
SC
2.5 (R4+R5+R6)
Low output voltage limit, VO (Low) =
R5+R6
2.5 (R4+R5+R6)
High output voltage limit, VO (High) =
R6
(
)
Voltage sensing delay, tD = 10,000 CD
FIGURE 9 - TYPICAL APPLICATION CIRCUIT
VIN - 5
SCR trigger power limiting resistor, RG > 0.2
FIGURE 10 - SENSING MULTIPLE SUPPLY VOLTAGES
FIGURE 11 - OVERCURRENT SHUTDOWN
Rev 1.1a
Copyright  1994
5
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
CONNECTION DIAGRAMS & ORDERING INFORMATION
Package
16-PIN CERAMIC DIP
J - PACKAGE
Part No.
(See Notes Below)
Ambient
Temperature Range
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
16-PIN PLASTIC DIP
N - PACKAGE
SG2543N
SG3543N
-25°C to 85°C
0°C to 70°C
16-PIN WIDE BODY
PLASTIC S.O.I.C.
DW - PACKAGE
SG2543DW
SG3543DW
-25°C to 85°C
0°C to 70°C
Connection Diagram
S.C.R. TRIGGER
REMOTE ACTIVATE
RESET
O.V. INDICATE
O.V. DELAY
1
16
+VIN
2
15
VREF
3
14
4
13
5
12
GROUND
C.L. OUTPUT
OFFSET/COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
11
6
O.V. INPUT
7
10
U.V. INPUT
8
9
U.V. DELAY
N Package: RoHS Compliant / Pb-free Transition DC: 0503
N Package: RoHS / Pb-free 100% Matte Tin Lead Finish
S.C.R. TRIGGER
REMOTE ACTIVATE
1
16
2
15
RESET
O.V. INDICATE
O.V. DELAY
3
14
4
13
5
12
O.V. INPUT
6
11
U.V. INPUT
U.V. DELAY
7
10
8
9
+VIN
VREF
GROUND
C.L. OUTPUT
OFFSET/COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
DW Package: RoHS Compliant / Pb-free Transition DC: 0516
DW Package: RoHS / Pb-free 100% Matte Tin Lead Finish
20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE
(Note 3)
SG1543L/883B
SG1543L
-55°C to 125°C
-55°C to 125°C
1. 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
3
2
1
20 19
4
18
5
17
6
16
7
15
8
14
9
10 11 12 13
11. N.C.
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
20. +VIN
Note 1. Contact factory for JAN and DESC product availablity.
2. All packages are viewed from the top.
3. Consult factory for product availability.
Rev 1.1a
Copyright  1994
6
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570