DPA423-426

10

K

1/04

Figure 7. LINE-SENSE and EXTERNAL CURRENT LIMIT Pin Characteristics.

-250

-200

-150

-100

-50

50

100

150

200

250

0

0

PI-2778-080801

Output

MOSFET

Switching

(Enabled)

(Disabled)

(Enabled)

(Disabled)

Current

Limit

-21.5 µA

-25.5 µA

X Pin Voltage

Output

MOSFET

Switching

Maximum

Duty Cycle

L Pin Voltage

Note: These figures provide idealized functional characteristics with typical performance values. Please refer to the

parametric table and typical performance characteristics sections of the data sheet for measured data.

X Pin Current (µA)

L Pin Current (µA)

131 µA

135 µA

47 µA

shows several different ways of using this pin. See Figure 7 for

a description of the functions where the horizontal axis (left

hand side) represents the EXTERNAL CURRENT LIMIT pin

current. The meaning of the vertical axes varies with function.

For those that control the on/off states of the output such as

remote ON/OFF, the vertical axis represents the enable/disable

states of the output. For external current limit, the vertical axis

represents the magnitude of the I

Typical Performance Characteristics section for the current

limit programming range and the selection of the appropriate

resistor value.