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
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