TLC6C5712-Q1 Datasheet, PDF (11/68 Pages) Texas Instruments – 12-Channel, Full-Diagnostic, Constant-Current-Sink LED Driver

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7 Detailed Description
TLC6C5712-Q1
SLVSCO9A – AUGUST 2015 – REVISED AUGUST 2015
7.1 Overview
The TLC6C5712-Q1 device is a 12-channel constant-current-sink LED driver. At the TLC6C5712-Q1 output
stage, 12 regulated current channels provide uniform and constant current for driving LEDs within a wide range
of forward-voltage variations.
Users can adjust output current from 10 mA to 75 mA through an external resistor, R_(IREF), which provides
flexibility in controlling the light intensity of the LEDs. The maximum constant-current value (full-scale range) of
all 12 channels is set by a single external resistor. The current of each individual output can be programmed in
256 linear steps, allowing further calibration. The design of the TLC6C5712-Q1 device supports up to 7 V at the
output ports. The serial communication interface is designed for high-throughput data transmission with
cascaded devices. The device has six PWM input channels and 12 output channels that can be mapped
arbitrarily to any of the 6 PWM inputs.
The TLC6C5712-Q1 device has advanced diagnostics, LED open-load detection, shorted-LED detection, short-
circuit to ground detection, reference resistor open and short protection, PWM input-frequency supervision,
adjacent-pin short diagnostics, thermal pre-warning and thermal protection. LED open-and-short and output
short-to-ground detection is available even when an LED channel is off. The diagnostic functions and errors can
be activated or de-activated individually by functions or channels. Users can configure the open-drain error
output to signalize various types of errors.
7.2 Functional Block Diagram
V_CC
OUT0 OUT1
OUT10 OUT11
IREF
PWM0
V_CC
R_(PU)
PWM5
V_CC
R_(PU)
LATCH
SCK
SDI
IO Regulator
PWM
MUX
SPI
and
Control
Logic
12
12
12
Output Driver
and
Error Detection
12
12-Bit Output
Latch
Configuration
Latches
Open-Drain
Error Output
16-Bit Shift
Register
SENSE
ERR
SDO
GND
PGND
Copyright © 2015, Texas Instruments Incorporated
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