TLC5924 Datasheet, PDF (10/23 Pages) Texas Instruments – 16-CHANNEL LED DRIVER WITH DOT CORRECTION AND PRE-CHARGE FET

TLC5924
SLVS626 – JUNE 2006
www.ti.com
BLANK
OUT0 Current ON
OUT14
OFF
t_pd2
t_d x 14
VUP
ON
t_pd2
t_d x 14
OFF
ON
OUT15
Pre-charge Period
Figure 9. Timing Chart of BLANK and OUTn
(On/Off Data Condition: OUT0=H, OUT14=H, OUT15=L)
VUP: Pre-Charge Power Supply
VUP is a pre-charge power supply terminal. The pre-charge voltage should be supplied to this terminal for
normal operation. When VUP terminal is open, TLC5924 keeps OUT0-15 open. TLC5924 has two VUP pins as
shown in the Terminal Functions Table. Both VUP pins should be connected to the pre-charge power supply as
shown in Figure 10.
Pre-Charge Power Supply
VUP
VUP
TLC5924
Figure 10. VUP Power Supply
Serial Interface Data Transfer Rate
The TLC5924 includes a flexible serial interface, which can be connected to a microcontroller or digital signal
processor. Only 3 pins are required to input data into the device. The rising edge of SCLK signal shifts the data
from SIN pin to internal shift register. After all data is clocked in, a rising edge of XLAT latches the serial data to
the internal registers. All data is clocked in with MSB first. Multiple TLC5924 devices can be cascaded by
connecting SOUT pin of one device with SIN pin of following device. The SOUT pin can also be connected to
controller to receive LOD information from TLC5924.
10
Submit Documentation Feedback