APPLICATION CIRCUIT

Figure 4.

Note : All node voltages are referred to ground pin (GND)

The currents flowing in the arrow direction are assumed positive

CONTROLLING A 120W HALOGEN LAMP WITH

THE L9610C/11C DIMMER

The L9610C/11C Lamp Dimmer is used to control

the brightness of vehicle headlamps using H4 type

lamps (see fig. 5). With switch S1 open the full sup-

ply voltage is applied to the lamps : closing the

switch it is a possible to reduce the average lamp

voltage as desired :

R3

VL = VS

R2 + R3

If pin 5 is connected to ground the average lamp

voltage is constant, even for supply voltages in ex-

cess of 13 V.

L9610C - L9611C

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