Microsemi Corporation SG1548J, SG1548J-883B, SG1548J-DESC, SG1548L, SG1548L-883B Datasheet

SG1548/SG2548/SG3548

QUAD POWER FAULT MONITOR

DESCRIPTION		FEATURES
The SG1548 is an integrated circuit capable of monitoring up to four		∙	Monitors four DC voltages and the AC line
positive DC supply voltages simultaneously for overvoltage and		∙	Precision 2.5V ±1% low-drift reference
undervoltage fault conditions.	An on-chip inverting op amp also	∙	Fault tolerance adjustable from ±5% to ±40%
allows monitoring one negative DC voltage. The fault tolerance		∙	±3% trip threshold tolerance over temperature
window is accurately programmable from ±5% to ±40% using a simple		∙	Separate 10mA, 40V overvoltage, undervoltage
divider network on the 2.5V reference. A single external capacitor sets		∙	and AC line fault outputs
the fault indication delay, eliminating false outputs due to switching			Fault delay programmable with a single capacitor
noise, logic transition current spikes, and short-term AC line interrup-		∙	30mV comparator hysteresis to prevent oscilla-
tions. An additional comparator referenced to 2.5V allows the AC line		∙	tions
to be monitored for undervoltage conditions or for generation of a line			On-chip inverting op amp for negative voltage
clock. The comparator can	also be used for programmable	∙	Open-collector output logic or expandability
undervoltage lockout in a switching power supply. Uncommitted		∙	Operation from 4.5V to 40V supply
collector and emitter outputs permit both inverting and non-inverting
operation. External availability of the precision 2.5V reference and		HIGH RELIABILITY FEATURES - SG1548
open-collector logic outputs permit expansion to monitor additional		♦ Available to MIL-STD-883
voltage using available open-collector quad comparators.
		♦ Radiation data available
		♦ LMI level "S" processing available

BLOCK DIAGRAM

11/91 Rev 1.2 5/97	LINFINITY Microelectronics Inc.
Copyright ã 1997	11861 Western Avenue ∞ Garden Grove, CA 92841
1	[phone] ∞ FAX: [phone]

SG1548/SG2548/SG3548

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage (+VIN) ..........................................................

40V

Inverting Op Amp Output Current ....................................

25mA

Fault Output Collector Voltage ............................................

40V

Operating Junction Temperature

150°C

Sense Input Voltage Range .................................

-0.3V to 6.0V

Hermetic (J, L Packages) .............................................

Fault Output Sink Current ................................................

20mA

Plastic (N, DW Packages) ............................................

150°C

Line Sense Input Current .................................................

±1mA

Storage Temperature Range ............................

-65°C to 150°C

Inverting Op Amp Input Current ........................................

-5mA

Lead Temperature ...........................................................

300°C

Note 1. Values beyond which damage may occur.

THERMAL DATA

J Package:

Thermal Resistance-Junction to Case, θJC ...................

30°C/W

Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).

Thermal Resistance-Junction to Ambient, θJA ..............

80°C/W

Note B. The above numbers for θJC are maximums for the limiting

N Package:

thermal resistance of the package in a standard mount-

Thermal Resistance-Junction to Case, θJC ..................

40°C/W

ing configuration. The

θJA numbers are meant to be

Thermal Resistance-Junction to Ambient, θJA .............

65°C/W

guidelines for the thermal performance of the device/pc-

DW Package:

board system. All of the above assume no ambient

Thermal Resistance-Junction to Case, θJC ..................

40°C/W

airflow.

Thermal Resistance-Junction to Ambient, θJA .............

95°C/W

L Package:

Thermal Resistance-Junction to Case, θJC ..................

35°C/W

Thermal Resistance-Junction to Ambient, θJA ...........

120°C/W

RECOMMENDED OPERATING CONDITIONS (Note 2)

Supply Voltage Range

Line Sense Output Current Range ...........................

0 to 10mA

±25% Maximum Fault Window (Note 3) ..............

4.5V to 35V

Voltage Reference Output Current ...........................

0 to 10mA

±40% Maximum Fault Window ...........................

5.0V to 35V

Operating Ambient Temperature Range

-55°C to 125°C

Lower Threshold Input Range .............................

1.5V to 2.45V

SG1548 .........................................................

Fault Tolerance Window Range ..........................

±5% to ±40%

SG2548 ...........................................................

-25°C to 85°C

Fault Output Sink Current Range .............................

0 to 10mA

SG3548 ...............................................................

0°C to 70°C

Note 2. Range over which the device is functional.

Note 3. Limited by inverter amplifier positive swing at -55°C.

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1548 with -55 °C ≤ TA ≤ 125°C, SG2548 with

-25°C ≤ TA ≤ 85°C, SG3548 with 0°C ≤ TA ≤ 70°C, and +VIN = 15V. Low duty cycle pulse testing techniques are used which maintains junction and case

temperatures equal to the ambient temperature.)

Parameter

Test Conditions

SG1548/2548

SG3548

Units

Min.

Typ.

Max.

Min.

Typ.

Max.

Supply Section

Supply Current

+VIN = 40V

4.8

10

4.8

10

mA

Reference Section (Note 4)

Output Voltage

TJ = 25°C

2.475

2.500

2.525

2.475

2.500

2.525

V

Over Temperature

2.450

2.550

2.450

2.550

V

Line Regulation

+VIN = 4.5V to 35V

1

5

1

5

mV

Load Regulation

IL = 0 to 10mA

3

10

3

10

mV

Short Circuit Current

VREF = 0V

10

25

50

10

25

50

mA

Fault Window Generator Section

Input Bias Current

VPIN 1 = 1.5V to 2.45V

-0.4

-2.0

-0.4

-2.0

μA

DC Sense Inputs Section

Overvoltage Threshold

VPIN 1 = 0.95 x VREF

2.547

2.625

2.704

2.547

2.625

2.704

V

VPIN 1 = 0.60 x VREF

3.396

3.500

3.606

3.396

3.500

3.606

V

Undervoltage Threshold

VPIN 1 = 0.95 x VREF

2.304

2.375

2.447

2.304

2.375

2.447

V

VPIN 1 = 0.60 x VREF

1.455

1.500

1.545

1.455

1.500

1.545

V

Input Bias Current

VSENSE = 1.5V to 3.5V

±0.6

±2.0

±0.6

±2.0

μA

Threshold Supply Rejection

+VIN = 4.5V to 35V

60

100

60

100

dB

Note 4. IL = 0mA

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

Copyright ã 1997

2

11861 Western Avenue ∞ Garden Grove, CA 92841

[phone]

∞ FAX: [phone]