TLD5541-1QV Datasheet, PDF (37/82 Pages) Infineon Technologies AG – H-Bridge DC/DC Controller with SPI Interface

V_EN/INUVLO
VEN/INUVLOth
t_{ACT IVE}
VIVCC_EXT_RTH,d
+VIVCCX_HYST
V_PWMI
VPWMI,ON
VPWMI,OFF
Switching
activity
I_LED
H-Bridge DC/DC Controller with SPI Interface
TLD5541-1QV
Digital Dimming Function
t
t
TPWMI
tPWMI,H
t
t
t
V_IOUTMON
200mV
t
Softstart
Power ON
Normal
Gate ON
Diagnosis ON
Dim
Gate OFF
Diag OFF
Normal
Gate ON
Diag ON
Dim
Gate OFF
Diag OFF
Normal
Gate ON
Diag ON
Dim
Gate OFF
Diag OFF
Figure 20 Timing Diagram LED Dimming and Start up behavior example ( V_VDD and V_VIN stable in the
functional range and not during startup)
Note: In Register REGUSETMON.REGUMODFB the regulation mode can be read. During PWMI = LOW the SPI will
always deliver the Regulation mode which was present at PWMI = HIGH as actual regulation mode, instead
of “no Regulation”.
Data Sheet
37
Rev. 1.0, 2016-05-20