4/90 Rev 1.1 2/94

Copyright

© 1994

11861 Western Avenue

∞

∞

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∞ Garden Grove, CA 92841

3

(714) 898-8121

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∞ FAX: (714) 893-2570

SG1540/SG2540/SG3540

Note 3. F

OSC

= 50KHz, R

T

= 3.48K C

T

= 4.7nF unless otherwise specified.

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

SG1540/2540/3540

Parameter

Units

Min.

Typ. Max.

Test Conditions

T

+V

R

R

46

400

50

5

2

54

12

5

1

KHz

%

%

KHz

KHz

Initial Accuracy

Voltage Stability

Oscillator Minimum Frequency

Oscillator Maximum Frequency

AC Output Section

I

I

I

I

C

C

0.3

2.0

55

0.6

0.2

Overvoltage Threshold

Overvoltage Bias Current

Overvoltage Clamp Voltage

+V

SCR ON Voltage

SCR Holding Current

2.50

0.1

7

42

9

0.35

2.63

1

8

44

12

0.55

V

µA

V

V

V

mA

CHARACTERISTIC CURVES

Overvoltage Crowbar Section

FIGURE 2 - OSCILLATOR FREQUENCY VS. R

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

V

V

V

V

%

µS

µS

13.5

13.0

0.2

1.2

50

0.3

0.1

12.5

12.0

45

HIGH Output Voltage

LOW Output Voltage

Squarewave Duty Cycle

AC Output Risetime

AC Output Falltime

2.37

6

37

0.15

V

I

I

V