l9610 STMicroelectronics, l9610 Datasheet - Page 11

• Manufacturer Part Number: l9610
• Description: Pwm Powermos Controller
• Manufacturer: STMicroelectronics

L9610
5
5.1
Application circuit
Figure 6.
1. All node voltages are referred to ground pin (GND).
2. The currents flowing in the arrow direction are assumed positive
Controlling a 120 W halogen lamp with the L9610C dimmer
The L9610C lamp dimmer is used to control the brightness of vehicle headlamps using H4
type lamps (see
lamps: closing the switch it is a possible to reduce the average lamp voltage as desired:
If pin 5 is connected to ground the average lamp voltage is constant, even for supply
voltages in excess of 13 V.
without C
without C
BS
BS
Application circuit
: C
: C
P
BS
Figure
= 1 nF
must be at least 10 times higher than the gate capacitance : C
7.). With switch S1 open the full supply voltage is applied to the
VL
=
VS
--------------------- -
R2
R3
+
R3
P
= 100 pF.
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