TLC5971 Datasheet, PDF (8/37 Pages) Texas Instruments – 12-Channel 16-Bit, Enhanced Spectrum PWM, RGB LED Driver with 3.3-V Linear Regulator

TLC5971
SBVS146 – AUGUST 2010
PWP PACKAGE
HTSSOP-20 PowerPAD
(TOP VIEW)
PIN CONFIGURATIONS
IREF 1
GND 2
OUTR0 3
OUTG0 4
OUTB0 5
OUTR1 6
OUTG1 7
OUTB1 8
SDTI 9
SCKI 10
PowerPAD
(Bottom Side)
20 VREG
19 VCC
18 OUTB3
17 OUTG3
16 OUTR3
15 OUTB2
14 OUTG2
13 OUTR2
12 SDTO
11 SCKO
SDTI 1
SCKI 2
NC^{(1) 3}
NC 4
SCKO 5
SDTO 6
RGE PACKAGE
QFN-24
(TOP VIEW)
www.ti.com
Thermal Pad
(Bottom Side)
18 GND
17 NC
16 IREF
15 VREG
14 NC
13 VCC
TERMINAL
NAME
PWP
SDTI
9
SCKI
10
SDTO
12
SCKO
11
VREG
20
IREF
1
OUTR0
3
OUTR1
6
OUTR2
13
OUTR3
16
OUTG0
4
OUTG1
7
OUTG2
14
OUTG3
17
(1) NC = not connected
TERMINAL FUNCTIONS
RGE
1
2
6
5
15
16
19
22
7
10
20
23
8
11
I/O
DESCRIPTION
I Serial data input for the 224-bit shift register
Serial data shift clock input.
I
Data present on SDTI are shifted to the LSB of the 224-bit shift register with the SCKI rising edge
Data in the shift register are shifted toward the MSB at each SCKI rising edge.
The MSB data of the shift register appear on SDTO.
Serial data output of the 224-bit shift register.
O SDTO is connected to the MSB of the 224-bit shift register.
Data are clocked out at the SCKI rising edge.
Serial data shift clock output.
O The input shift clock signal from SCKI is adjusted to the timing of the serial data output for SDTO
and the signal is then output at SCKO.
Internal linear voltage regulator output.
A decoupling capacitor of 1 µF must be connected. This output can be used for external devices
I/O as a 3.3-V power supply. This terminal can be connected with the VREG terminal of other
devices to increase the supply current. Also, this pin can be supplied with 3 V to 5.5 V from an
external power supply by connecting it to VCC.
Maximum current programming terminal.
I/O
A resistor connected between IREF and GND sets the maximum current for every
constant-current output. When this terminal is directly connected to GND, all outputs are forced
off. The external resistor should be placed close to the device.
O
O ^{RED constant-current outputs.}
Multiple outputs can be configured in parallel to increase the constant-current capability.
O _{Different voltages can be applied to each output.}
O
O
O ^{GREEN constant-current outputs.}
Multiple outputs can be configured in parallel to increase the constant-current capability.
O _{Different voltages can be applied to each output.}
O
8
Submit Documentation Feedback
Product Folder Link(s): TLC5971
Copyright © 2010, Texas Instruments Incorporated