TL783C, TL783Y

HIGH-VOLTAGE ADJUSTABLE REGULATOR

SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997

3

POST OFFICE BOX 655303

functional block diagram

+

–

Protection

Circuit

OUT

IN

Vref

R1

R2

VO

VI

Error

Amplifier

ADJ

V

O ≈

V

ref

1

) R2

R1

125 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 W

. . . . . . . . . . . . . . . . . . . . . . . . . .

20 W

. . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 150°C

. . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

junction temperature, these ratings should not be exceeded. Due to variations in individual device electrical characteristics and thermal

resistance, the built-in thermal overload protection may be activated at power levels slightly above or below the rated dissipation

Figure 1

TA – Free-Air Temperature – °C

FREE-AIR TEMPERATURE

DISSIPATION DERATING CURVE

1000

800

400

200

0

1800

600

25

50

75

100

1400

1200

1600

2000

125

150

Derating Factor = 16 mW/

°C

R

θJA ≈ 62.5°C/W

Figure 2

TC – Case Temperature – °C

16

12

4

0

25

50

75

100

20

CASE TEMPERATURE

DISSIPATION DERATING CURVE

125

150

8

24

Derating Factor = 250 mW/

°C

Above 70

°C

R

θJC ≈ 4°C/W