SG3548J [MICROSEMI]

QUAD POWER FAULT MONITOR; QUAD电源故障监视器


型号：	SG3548J
厂家：	Microsemi
描述：	QUAD POWER FAULT MONITOR QUAD电源故障监视器电源电路电源管理电路监视器 CD
文件：	总4页 (文件大小：56K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SG1548/SG2548/SG3548

QUAD POWER FAULT MONITOR

DESCRIPTION

FEATURES

• Monitors four DC voltages and the AC line

• Precision 2.5V ±1% low-drift reference

• Fault tolerance adjustable from ±5% to ±40%

• ±3% trip threshold tolerance over temperature

• Separate 10mA, 40V overvoltage, undervoltage

and AC line fault outputs

• Fault delay programmable with a single capacitor

• 30mV comparator hysteresis to prevent oscilla-

tions

The SG1548 is an integrated circuit capable of monitoring up to four

positive DC supply voltages simultaneously for overvoltage and

undervoltage fault conditions. An on-chip inverting op amp also

allows monitoring one negative DC voltage. The fault tolerance

window is accurately programmable from ±5% to ±40% using a simple

dividernetworkonthe2.5Vreference. Asingleexternalcapacitorsets

the fault indication delay, eliminating false outputs due to switching

noise, logic transition current spikes, and short-term AC line interrup-

tions. An additional comparator referenced to 2.5V allows the AC line

to be monitored for undervoltage conditions or for generation of a line

clock. The comparator can also be used for programmable

undervoltage lockout in a switching power supply. Uncommitted

collector and emitter outputs permit both inverting and non-inverting

operation. External availability of the precision 2.5V reference and

open-collector logic outputs permit expansion to monitor additional

voltage using available open-collector quad comparators.

• On-chip inverting op amp for negative voltage

• Open-collector output logic or expandability

• Operation from 4.5V to 40V supply

HIGH RELIABILITY FEATURES - SG1548

♦ Available to MIL-STD-883

♦ Radiation data available

♦ LMI level "S" processing available

BLOCK DIAGRAM

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

SG1548/SG2548/SG3548

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage (+V_IN) .......................................................... 40V

Fault Output Collector Voltage ............................................ 40V

Sense Input Voltage Range ................................. -0.3V to 6.0V

Fault Output Sink Current ................................................ 20mA

Line Sense Input Current ................................................. ±1mA

Inverting Op Amp Input Current ........................................ -5mA

Inverting Op Amp Output Current .................................... 25mA

Operating Junction Temperature

Hermetic (J, L Packages) .............................................150°C

150°C

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

Storage Temperature Range ............................ -65°C to 150°C

Lead Temperature ........................................................... 300°C

Note 1. Values beyond which damage may occur.

THERMAL DATA

J Package:

Note A. Junction Temperature Calculation: T_J= T_A+ (P_Dx θ_JA).

Note B. The above numbers for θ_JCare maximums for the limiting

thermal resistance of the package in a standard mount-

ing configuration. The θ_JAnumbers 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, 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 2)

Supply Voltage Range

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

0 to 10mA

±25% Maximum Fault Window (Note 3) .............. 4.5V to 35V

±40% Maximum Fault Window ........................... 5.0V to 35V

Lower Threshold Input Range ............................. 1.5V to 2.45V

Fault Tolerance Window Range .......................... ±5% to ±40%

Fault Output Sink Current Range ............................. 0 to 10mA

Voltage Reference Output Current ........................... 0 to 10mA

Operating Ambient Temperature Range

SG1548 ......................................................... -55°C to 125°C

SG2548 ........................................................... -25°C to 85°C

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 ≤ T_A≤ 125°C, SG2548 with

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

temperatures equal to the ambient temperature.)

SG1548/2548

SG3548

Parameter

Supply Section

Test Conditions

Units

Min. Typ. Max. Min. Typ. Max.

Supply Current

+V = 40V

4.8

Reference Section (Note 4)

Output Voltage

2.475 2.500 2.525 2.475 2.500 2.525

T_J= 25°C

2.450

2.550 2.450

2.550

Over Temperature

Line Regulation

Load Regulation

Short Circuit Current

+V = 4.5V to 35V

I_L= 0 to 10mA

V_REF= 0V

Fault Window Generator Section

Input Bias Current

V_{PIN 1}= 1.5V to 2.45V

-0.4 -2.0

µA

DC Sense Inputs Section

Overvoltage Threshold

V_{PIN 1}= 0.95 x V_REF

V_{PIN 1}= 0.60 x V_REF

V_{PIN 1}= 0.95 x V_REF

V_{PIN 1}= 0.60 x V_REF

V_SENSE= 1.5V to 3.5V

2.547 2.625 2.704 2.547 2.625 2.704

3.396 3.500 3.606 3.396 3.500 3.606

2.304 2.375 2.447 2.304 2.375 2.447

1.455 1.500 1.545 1.455 1.500 1.545

Undervoltage Threshold

Input Bias Current

Threshold Supply Rejection

±0.6 ±2.0

60 100

±0.6 ±2.0 µA

60 100

+V = 4.5V to 35V

Note 4. I_L= 0mA

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

SG1548/SG2548/SG3548

ELECTRICAL CHARACTERISTICS (continued)

SG1548/2548

Min. Typ. Max. Min. Typ. Max.

SG3548

Parameter

Test Conditions

Units

Fault Delay Section

Comparator Threshold

Comparator Hysteresis

Delay Charging Current

On Saturation Voltage

OFF Clamp Voltage

1.200 1.250 1.300 1.200 1.250 1.300

µA

V_{PIN 8}= 0V

_{PIN 8}= 0mA

I_{PIN 8}= 0mA

32.5 50 67.5 32.5 50 67.5

0.2

0.1

+3.2 +3.6

0.1 0.2

+3.2 +3.6

Inverting Op Amp Section (Note 5)

Input Offset Voltage

Input Bias Current

Output High Voltage

Output Low Voltage

Large Signal Voltage Gain

Output Source Current

Power Supply Rejection Ratio

µA

-0.3 -1.0

3.2 3.5

-0.3 -1.0

3.2 3.5

1.0 1.9

72 100

I_SOURCE= 5mA

1.9

I_SINK= 5mA

1.0

72 100

R_L= 10K

+V = 4.5V to 35V

AC Line Sense Section

Comparator Threshold

Comparator Hysteresis

Input Bias Current

Collector Leakage Current

Collector Saturation Voltage

Emitter Output Voltage

Diode Clamp Voltage

2.560 2.440 2.500

_{PIN 5}= Low to High

2.440 2.500

2.560

µA

V_{PIN 5}= 2.5V

V_CE= 40V

I_C= 10mA

I_E= 10mA

I_{PIN 5}= 1mA

0.2 0.5

6.0

-0.3

7.5 6.0

7.5

-1.0

I_{PIN 5}= -1mA

-0.3

Fault Logic Outputs (Each output)

Collector Leakage Current

V_C= 40V

µA

Collector Saturation Voltage

I_C= 10mA

0.2 0.5

Note 5. +V_IN= 4.5V.

APPLICATION INFORMATION

MONITORING A NEGATIVE VOLTAGE

SETTING THE FAULT TOLERANCE WINDOW

A negative voltage can be converted to a positive one and

simultaneously scaled to +2.50V by using the internal operational

amplifier as an inverter. Only an input resistor and feedback

resistor are required.

The fault tolerance window is set by applying a voltage less than

the +2.50Vreference to the Lower Threshold input (Pin 1). The

voltage is obtained by a resistor divider from the reference (Pin 3)

to ground. If ±5% tolerance is desired, then 95% of the reference

(+2.375V) is applied to Pin 1. If ±40% is wanted, then 60% of the

reference (+1.50V) is applied. In the example on the back page,

the tolerance is ±5%. The nominal overvoltage and undervoltage

thresholds are centered about the reference at +2.625V and

+2.375V (+2.500V ±0.125V).

SETTING THE FAULT DELAY

A single capacitor at the Delay pin sets the time an out-of-

tolerance fault must persist before a fault is actually declared.

This feature allows switching noise on the supplies to be rejected.

The delay time is given by: Delay = 25ms/µF .

SCALING THE MONITORED SUPPLY VOLTAGES

AC LINE MONITORING

Each positive voltage to be monitored is divided down to +2.50V

with a resistor network and connected to one of the Sense inputs.

Unused Sense inputs should be connected to the reference. This

will not increase the bias current. A variation of the monitored

voltages out of the programmed tolerance range will cause the

appropriate overvoltage or undervoltage fault output to switch

LOW. The effective tolerance on any input may be broadened

with an additional resistor to the voltage reference. The example

on the back page shows a ±10% tolerance on the +5Vsupply

although the SG1548 is programmed for a ±5% tolerance. The

procedure for calculating the resistor value is found in the

SG1548 Application Note.

The AC line voltage can be monitored for single-cycle dropouts

with the few components shown in the example. A half-wave

rectifier charges the capacitor on positive line cycles. After the

positive peak and during the negative line cycle the capacitor

discharges from a fixed voltage controlled by the internal Zener

diode. If a positive cycle is missing, the capacitor discharges to

below the +2.5V trip point of the comparator, causing the output

transistor to turn on.

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

SG1548/SG2548/SG3548

APPLICATION EXAMPLE

In this example, the SG1548 simultaneously monitors four DC voltages: +5V, +24V, and ±15V. Three different fault tolerances are

programmed: ±5% on the two 15V supplies, ±10% on the +5V supply, and ±20% on the +24V supply. The 5µF delay capacitor provides

125 milliseconds of fault delay.

CONNECTION DIAGRAMS & ORDERING INFORMATION (See Notes Below)

Ambient

Temperature Range

Package

Part No.

Connection Diagram

16-PIN CERAMIC DIP

J - PACKAGE

SG1548J/883B

SG1548J

SG2548J

-55°C to 125°C

-25°C to 85°C

0°C to 70°C

INV. OUTPUT

INV. INPUT

SENSE 4

LOWER THRESHOLD

GROUND

V_REF

SENSE 3

SG3548J

LINE SENSE

EMITTER OUTPUT

COLLECTOR OUTPUT

DELAY

SENSE 2

SENSE 1

U.V. FAULT

O.V. FAULT

16-PIN PLASTIC DIP

N - PACKAGE

SG2548N

SG3548N

-25°C to 85°C

0°C to 70°C

16-PIN WIDE BODY

PLASTIC S.O.I.C.

DW - PACKAGE

SG2548DW

SG3548DW

-25°C to 85°C

0°C to 70°C

LOWER THRESHOLD

GROUND

INV. OUTPUT

INV. INPUT

SENSE 4

V_REF

+V_IN

SENSE 3

LINE SENSE

EMITTER OUTPUT

COLLECTOR OUTPUT

SENSE 2

SENSE 1

U.V. FAULT

O.V. FAULT

DELAY

20 19

11. N.C.

1. N.C.

2. LOWER THRESHOLD

3. GROUND

4. V_REF

5. +V_IN

6. N.C.

20-PIN CERAMIC (LCC)

LEADLESS CHIP CARRIER

L- PACKAGE

SG1548L/883B

SG1548L

-55°C to 125°C

12. O.V. FAULT

13. U.V. FAULT

14. SENSE 1

15. SENSE 2

16. N.C.

17. SENSE 3

18. SENSE 4

19. INV. INPUT

20. INV. OUTPUT

7. LINE SENSE

8. EMITTER OUTPUT

9. COLLECTOR

OUTPUT

10.DELAY

10 11 12 13

Note1. Contact factory for JAN and DESC product availability.

2. All parts are viewed from the top.

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 FAX: (714) 893-2570

∞

SG3548J [MICROSEMI]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E