TLD5541-1QV Datasheet, PDF (36/82 Pages) Infineon Technologies AG – H-Bridge DC/DC Controller with SPI Interface

H-Bridge DC/DC Controller with SPI Interface
TLD5541-1QV
Digital Dimming Function
7
Digital Dimming Function
To change brightness of LED loads without affecting the lighting-color of the LED a digital Dimming function via
PWM (Pulse Width Modulation) is often required.
7.1
Description
PWM dimming is commonly practiced to prevent color shift in the LED light source.
Via Parallel Interface
The PWMI pin detects a pulse width modulated (PWM) signal that disable the gate drivers from delivering output
current.
µC
PWM
Digital dimming
PWMI
+3.3V or +5V
SPI
VDD
CSN
SI
SO
SCLK
VSS
AGND
Figure 19 Digital Dimming Overview
Data Sheet
36
Rev. 1.0, 2016-05-20