TLC5926-Q1_16 Datasheet, PDF (22/36 Pages) Texas Instruments – TLC592x-Q1 16-Channel Constant-Current LED Sink Drivers

TLC5926-Q1, TLC5927-Q1
SLVS973A – SEPTEMBER 2009 – REVISED JULY 2015
www.ti.com
10.2 Typical Applications
10.2.1 Single Implementation of TLC5926/TLC5927-Q1 Device
The TLC592x-Q1 Constant-Current LED Sink Drivers is designed to work alone or cascaded. shows
implementation of a single TLC591x-Q1 device.
VLED
VDD: 3.0 V
to 5.5 V
SDI
SDI
CLK
CLK
LE
LE
OE
OE
VDD
SDO
R-EXT
GND
To Controller if Error
Detection Used
Figure 18. Simple Implementation of TLC591x-Q1 Circuit
10.2.1.1 Design Requirements
For this design example, use the parameters listed in Table 6. The purpose of this design procedure is to
calculate the power dissipation in the device and the operating junction temperature.
Table 6. Design Parameters
DESIGN PARAMETERS
No. of LED strings
No. of LEDs per string
LED current (mA)
Forward voltage of each LED (V)
Junction-to-ambient thermal resistance (°C/W)
Ambient temperature of application (°C)
V_DD (V)
I_DD (mA)
Max operating junction temperature (°C)
EXAMPLE VALUES
16
3
20
3.5
39.7
115
5
17
150
22
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