6

UC19431

UC29431

UC39431

UC39431B

Figure 4. Internal 1.3V vs. temperature.

Figure 5. Error amp voltage gain and phase vs.

frequency.

UNITRODE CORPORATION

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 • FAX (603) 424-3460

UDG-95092

UDG-95091

Table 1. Resistor divider connection table for shunt applications

REGULATED VOLTAGE

CONNECT R1 TO:

CONNECT R2 TO:

CONNECT R3 TO:

2.82V

SENSE (pin 7)

COLL (pin 1)

SENSE (pin 7)

3.12V

open

COLL (pin 1)

SENSE (pin 7)

5.1V

COLL (pin 1)

SENSE (pin 7)

open

7.8V

COLL (pin 1)

SENSE (pin 7)

GND (pin 8)

10.42V

COLL (pin 1)

SENSE (pin 7)

SENSE (pin 7)

12.24V

COLL (pin 1)

open

SENSE (pin 7)

Note: To obtain the shunt regulated or optocoupler sensed voltage specified in the left column, connect the internal resistors (R1,

R2, R3) as indicated. Refer to the shunt regulator application in Fig.1.