TLC59116-Q1 Datasheet, PDF (12/39 Pages) Texas Instruments – 16-Channel Constant-Current LED Sink Driver

TLC59116-Q1
SLDS223A – MARCH 2016 – REVISED MARCH 2016
9 Detailed Description
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9.1 Overview
The TLC59116-Q1 is an I²C Bus controlled 16-channel LED driver that is optimized for red/green/blue/amber
(RGBA) color mixing and backlight application. Each LED output has its own 8-bit resolution (256 steps) fixed-
frequency individual PWM controller that operates at 97-kHz, with a duty cycle that is adjustable from 0% to
99.6%. The individual PWM controller allows each LED to be set to a specific brightness value. An additional 8-
bit resolution (256 steps) group PWM controller has both a fixed frequency of 190-Hz and an adjustable
frequency between 24-Hz to once every 10.73 seconds, with a duty cycle that is adjustable from 0% to 99.6%.
The group PWM controller dims or blinks all LEDs with the same value.
9.2 Functional Block Diagram
A0 A1 A2 A3
REXT
OUT0 OUT1
OUT14 OUT15
SCL
SDA
RESET
V_CC
GND
Input Filter
I²C Bus Control
Power-On
Reset Control
PWM Register X
Brightness Control
I/O Regulator
Output Driver and Error Detection
LED State
Select Register
97 kHz
25-MHz
Oscillator
24.3 kHz
GRPFRQ
Register
190 kHz
GRPPWM
Register
0 = Permanently off
1 = Permanently on
9.3 Feature Description
9.3.1 Open-Circuit Detection
The TLC59116-Q1 LED open-circuit detection compares the effective current level I_OUT with the open load
detection threshold current I_OUT,Th. If I_OUT is below the threshold I_OUT,Th the TLC59116-Q1 detects an open load
condition. This error status can be read out as an error flag through the registers EFLAG1 and EFLAG2.
For open-circuit error detection, a channel must be on and the PWM must be off. See Table 1.
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