TLC5970 Datasheet, PDF (10/48 Pages) Texas Instruments – 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converter and Differential Signal Interface

TLC5970
SBVS140 – MARCH 2010
FUNCTIONAL BLOCK DIAGRAM
VCC
FB
FB
SWOFF
VCC
Voltage
Reference
VREG
5-V
Regulator
10-MHz
OSC
OVP/SCP
Voltage Control
with Soft-Start,
Overvoltage Protection,
and Short-Circuit Protection _FB
Switch
Timing
Control
PH
High-Side
MOS SW
VROM
SDTA
SDTB
SCKA
SCKB
1/2
CLK
SEL
VREG
Display
Timing
Control
Constant-Current
Control
UVLO
CLKSEL
DSPRST
AUTORPT
36
7 21
Thermal
Detector
3
BC Data
LSB
MSB
7-Bit Brightness
Control Second Latch
DC
Data
ROM Write
Control
LSB ⁷
MSB
12-Bit Function Control
Data Latch
8
EEPROM
(36-Bit)
29
0
DC ¹¹
LSB ^{13 Loadcnt}
MSB
TIMESEL
21-Bit Dot Correction
Data Latch
Latch
Pulse Gen
0
20
LSB
21
36-Bit Grayscale
Second Data Latch
Address/Command
0
LSB
36
Differential
19
Line Receiver
36-Bit Grayscale
First Data Latch
0
LSB
3
GS
Data
VCC FB
MSB
Select
Switch
35
MSB
5-V
Regulator
Differential
Line Driver
35
MSB
40-Bit Common Shift Register
Clock
0
39
Timing
Adjust
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BOOT
PH
VREG
OUT 0
OUT 1
OUT 2
IREF0
IREF1
IREF2
VREGIF
SDTY
SDTZ
SCKY
SCKZ
10
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GND
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