Pin connections and function

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Pin connections and function

Figure 1.

Pin connection

Figure 2.

Current and voltage conventions

Table 9.

Pin function

Pin Name

Pin Function

Power supply of the control circuits. Also provides a charging current during start up

thanks to a high voltage current source connected to the drain. For this purpose, an

off the start up current source.

the start up current source.

SOURCE

Power MOSFET source and circuit ground reference.

DRAIN

Power MOSFET drain. Also used by the internal high voltage current source during

FB

Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak

drain MOSFET current. The current limitation, which corresponds to the maximum

drain current, is obtained for a FB pin shorted to the SOURCE pin.

1

2

3

4

DRAIN

DRAIN

DRAIN

DRAIN

8

7

6

5

DRAIN

DRAIN

DRAIN

DRAIN

1

2

3

4

8

7

6

5

FB

VDD

SOURCE

FB

VDD

SOURCE

SOURCE

SOURCE

SO-8

DIP-8

I

DD

I

D

I

FB

V

DD

V

FB

V

D

FB

VDD

DRAIN

SOURCE

CONTROL

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