SG1544J [MICROSEMI]
LOW-VOLTAGE SUPERVISORY CIRCUIT; 低电压监控电路
| 型号： | SG1544J |
| 厂家： | 
Microsemi |
| 描述： | LOW-VOLTAGE SUPERVISORY CIRCUIT |
| 文件： | 总4页 (文件大小：45K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SG1544/SG2544/SG3544
LOW-VOLTAGE SUPERVISORY CIRCUIT
DESCRIPTION
FEATURES
• Uncommitted comparator inputs for
wide input flexibility
• Common-Mode range from zero to near
supply voltage
This device was designed to provide all the operational features of the SG1543/
2543/3543 devices but with the added advantage of uncommitted inputs to the
voltage sensing comparators. This allows monitoring of voltage levels less than
2.5 volts by dividing down the internal reference supply.
• Reference voltage trimmed to 1%
accuracy
In all other respects, the SG1544 series is identical to the SG1543 series. These
monolithic devices contain all the functions necessary to monitor and control the
output of a sophisticated power supply system. Over-voltage sensing with
provision to trigger an external SCR “crowbar” shutdown; an under-voltage circuit
which can be used to monitor either the output or sample the input line voltage;
and a third op amp/comparator usable for current sensing are all included in this
IC, together with an independent, accurate reference generator.
• Over-voltage, under-voltage, and current
sensing circuits all included
• SCR "Crowbar" drive of 300mA
• Programmable time delays
• Open-collector outputs and remote
activation capability
• Total standby current less than 10mA
The voltage-sensing input comparators are identical and can be used with
threshold levels from zero volts to (VIN - 3V). Each has approximately 25mv of
hysteresis which is offset so the switching differential threshold is zero on the non-
inverting input for rising levels and zero on the inverting input for falling signals.
All other operating characteristics are as described in the SG1543 data sheet and
application note.
HIGH RELIABILITY FEATURES
- SG1544
♦ Available to MIL-STD-883 and DESC
SMD
♦ LMI level "S" processing available
BLOCK DIAGRAM
4/90 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
SG1544/SG2544/SG3544
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
Hermetic (J Package) .................................................. 150°C
150°C
Plasitc (N, DW Packages) .......................................
Storage Temperature Range ............................ -65°C to 150°C
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 = TA + (PD x θJA).
Thermal Resistance-Junction to Case, θJC .................. 25°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 70°C/W
N Package:
Thermal Resistance-Junction to Case, θJC .................. 30°C/W
Thermal Resistance-Junction to Ambient, θJA ............. 60°C/W
DW Package:
Note B. The above numbers for θJC are maximums 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 ............. 90°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
SG1544 ......................................................... -55°C to 125°C
IN
Reference Load Current ........................................... 0 to 10mA
Indicator Output Voltage ........................................ 4.7V to 40V
Indicator Output Current ........................................... 0 to 10mA
SG2544 ...........................................................
-25°C to 85°C
SG3544 .............................................................. 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 1.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1544 with -55°C ≤ TA ≤ 125°C, SG2544 with
-25°C ≤ TA ≤ 85°C, SG3544 with 0°C ≤ TA ≤ 70°C, and +VIN = 10V. Indicator outputs have 2kΩ pull-up resistors. All electrical ratings and specifications
are tested with the inverting over-voltage input and the non-inverting under-voltage input externally connected to the 2.5V reference. Low duty cycle
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG1544/2544
SG3544
Parameter
Supply Section
Test Conditions
Units
Min. Typ. Max. Min. Typ. Max.
Input Voltage Range
TJ = 25°C to TMAX
4.5
4.7
4.5
4.7
40
40
10
V
V
mA
40
40
10
Supply Current
+V = 40V, Outputs open
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
Line Regulation
Load Regulation
Short Circuit Current
Temperature Stability
+V = 5 to 30V
IREFIN= 0 to 10mA
1
1
1
1
VREF = 0V
12
25
.005
40
12
25
.005
40
4/90 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
∞
SG1544/SG2544/SG3544
ELECTRICAL CHARACTERISTICS (continued)
SG1544/2544
SG3544
Parameter
Test Conditions
Units
Min. Typ. Max. Min. Typ. Max.
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
VO.V. N.I. IN = 2.7V, VU.V. INV. IN = 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
+V = 5V, RG = 0, VO = 0
100 200
400 100 200 400
mA
V
V
IN
+V = 15V, IO = 100mA
12
13
0
12
13
IN
+V = 40V, RL = 1KΩ
0.1
0
0.1
IN
Remote Activate Current
Remote Activate Voltage
Reset Current
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
0.4 0.8
mA
V
mA
V
mA/µs
ns
2
0.4
2
6
0.8
6
2
6
0.4 0.8
Reset Voltage
2
6
Output Current Rise Time
Prop. Delay from REM. ACT. Pin
Prop. Delay fom O.V. N.I. IN Pin
400
300
500
400
300
500
VO.V. N.I. 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
10Ω 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
V
IND = 40V
AV = 0dB, TJ = 25°C
OVERDRIVE = 100mV, TJ = 25°C
V
200
200
Note 5. Input voltage rising on O.V. N.I. INPUT and falling on U.V. INV. INPUT.
APPLICATION INFORMATION
SG1544
FIGURE 1 - SURGE LIMIT CIRCUIT FOR LARGE DELAY CAPACITORS
The 100 ohm resistor limits the peak discharge current into the SG1544 while the external PNP transistor provides a high peak-current
discharge path for the delay capacitor.
4/90 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
SG1544/SG2544/SG3544
CONNECTION DIAGRAMS & ORDERING INFORMATION (See Notes Below)
Ambient
Temperature Range
Package
Part No.
Connection Diagram
18-PIN CERAMIC DIP
J - PACKAGE
SG1544J/883B
SG1544JDESC
SG1544J
SG2544J
SG3544J
-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
1
2
3
4
5
6
7
8
9
18
17
SCR TRIGGER
REMOTE ACTIVATE
RESET
+VIN
VREF
16
15
14
13
GROUND
O.V. INDICATE
O.V. DELAY
C.L. OUTPUT
OFFSET / COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
U.V. DELAY
O.V. N.I. INPUT
O.V. INV. INPUT
U.V. N.I. INPUT
U.V. INV. INPUT
12
11
18-PIN PLASTIC DIP
N - PACKAGE
SG2544N
SG3544N
-25°C to 85°C
0°C to 70°C
10
18-PIN WIDE BODY
PLASTIC S.O.I.C.
DW - PACKAGE
SG2544DW
SG3544DW
-25°C to 85°C
0°C to 70°C
18
17
1
2
3
4
5
6
7
8
9
SCR TRIGGER
REMOTE ACTIVATE
RESET
+VIN
VREF
16
15
14
13
GROUND
O.V. INDICATE
O.V. DELAY
C.L. OUTPUT
OFFSET / COMP
C.L. N.I. INPUT
C.L. INV. INPUT
U.V. INDICATE
U.V. DELAY
O.V. N.I. INPUT
O.V. INV. INPUT
U.V. N.I. INPUT
U.V. INV. INPUT
12
11
10
Note 1. Contact factory for JAN and DESC product availablity.
2. All packages are viewed from the top.
4/90 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
∞
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