TLC5951 Datasheet, PDF (7/46 Pages) Texas Instruments – 24-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control

TLC5951
www.ti.com
SBVS127B – MARCH 2009 – REVISED DECEMBER 2009
FUNCTIONAL BLOCK DIAGRAM
VCC
GSSIN
GSSCK
GSLAT
DCSIN
DCSCK
GSCKR
GSCKG
GSCKB
XBLNK
IREF
GND
VCC
33rd GSCKR/G/B After XBLNK
Goes High or Internal Blank Signal⁽¹⁾
LOD/LSD Data Latch for R/G/B
216
LSB
48
MSB
288-Bit Common Shift Register
Latch
Select
0
288
287
Lower 216
LSB
MSB
Grayscale Data Latch
(12 Bits x 24 Channels)
0
Higher 17 ²⁸⁷
LSB
MSB
216-Bit DC/BC/FC/UD Shift Register
Auto Latch
Pulse Gen
GS Counter
for RED
GS Counter
for GREEN
GS Counter
for BLUE
0
288
LSB
216
Lower 199
215
MSB
Dot Correction (7-Bit x 24-Channels)/
Brightness Control (8-Bit x 3 Group)/
Function Control (7-Bit)/User-Defined (17-Bit) Data Latch
0
216
215
216
TMGRST
3
96
Lower 198
12
12-Bit PWM
DSPRPT/PWMMODE
3
Timing Control
96
12
8
12
12-Bit PWM
Timing Control
8
3
96
3
12-Bit PWM
Timing Control
8
4-Grouped
Switch Delay
4-Grouped
Switch Delay
4-Grouped
Switch Delay
3
195
Reference
Current
Control
8
8
8-Bit Brightness
Control
8
8
8-Bit Brightness
Control
8 24
8
171
8-Bit Brightness
Control
Thermal
Detection
GND
24-Channel Constant-Current Driver with 7-Bit Dot Correction
48
LED Open Detection (LOD)/LED Short Detection (LSD)
GSSOUT
DCSOUT
¼
¼
¼
OUTR0 ^¼ OUTR7 OUTG0 ^¼ OUTG7 OUTB0 ^¼ OUTB7
(1) The internal blank signal is generated when GSLAT is input for GS data with display timing reset enabling. Furthermore, the signal is
generated at the 4096th GSCK when auto repeat mode is enabled. XBLNK can be connected to V_CC when the display timing reset or auto
repeat is enabled.
Copyright © 2009, Texas Instruments Incorporated
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