SG2540Y Просмотр технического описания (PDF) - Microsemi Corporation

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SG2540Y

OFF-LINE START-UP CONTROLLER

Microsemi Corporation 

SG1540/SG2540/SG3540

ELECTRICAL CHARACTERISTICS (continued)

Parameter

Test Conditions

Oscillator Section (Note 3)

Initial Accuracy

Voltage Stability

Temperature Stability (Note 4)

Oscillator Minimum Frequency

Oscillator Maximum Frequency

AC Output Section

HIGH Output Voltage

LOW Output Voltage

Squarewave Duty Cycle

AC Output Risetime

AC Output Falltime

Overvoltage Crowbar Section

Overvoltage Threshold

Overvoltage Bias Current

Overvoltage Clamp Voltage

+VIN Overvoltage Threshold

SCR ON Voltage

SCR Holding Current

TJ = 25°C

+V = 12 to 18V

IN

RT = 17.8K, CT = .068µF

R = 1.5K, C = 470pF

T

T

ISOURCE = 20mA

ISOURCE = 100mA

I = 20mA

SINK

ISINK = 100mA

C = 1000pF

L

CL = 1000pF

VO.V. = 0 to 2.37V

IO.V. = 1mA

IVIN = 35mA

VO.V. = 0

Note 3. F = 50KHz, R = 3.48K C = 4.7nF unless otherwise specified.

OSC

T

T

Note 4. These parameters, although guaranteed, are not tested in production.

SG1540/2540/3540 Units

Min. Typ. Max.

46 50 54 KHz

5 12 %

25

%

1 KHz

400

KHz

12.5 13.5

V

12.0 13.0

V

0.2 0.3 V

1.2 2.0 V

45 50 55 %

0.3 0.6 µS

0.1 0.2 µS

2.37 2.50 2.63 V

0.1 1

µA

678

V

37 42 44

V

9 12

V

0.15 0.35 0.55 mA

CHARACTERISTIC CURVES

FIGURE 1 - SATURATION VOLTAGE (DC OUT PIN) VS. OUTPUT CURRENT

FIGURE 2 - OSCILLATOR FREQUENCY VS. RT AND CT

4/90 Rev 1.1 2/94

Copyright © 1994

LINFINITY Microelectronics Inc.

3

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

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