TS19370_10 Datasheet, PDF (6/8 Pages) Taiwan Semiconductor Company, Ltd – Boost (Step-up) WLED Driver with OVP

TS19370
Boost (Step-up) WLED Driver with OVP
Application Information (Continue)
2. Using a Filtered PWM Signal
The filtered PWM signal can be considered as an adjustable DC voltage. It can be used to replace the variable
DC voltage source in dimming control. The circuit is shown as follow:
Dimming Control using a Filtered PWM Signal
Duty
Iout ( mA)
0%
20
20%
17.4
30%
15
40%
12.4
50%
10
60%
8
70%
6.4
80%
4.07
100%
0
PWM : 2V ; 1KHz ; Vin=3.6V
6/8
Version: D08