There are various LED indicators in automotive applications. Some applications such as
hybrid instrument clusters and E-shifters have safety requirements which must have LED fault
diagnostics; other applications such as HVAC panels only have an LED on-off control, which does not
require LED diagnostics. To cover both applications, the TLC6C5816-Q1 device implements a flexible
LED diagnostics function. By writing to the registers, the output channels can be configured with
LED diagnostics features or without LED diagnostics features.
The TLC6C5816-Q1 device is a 16-bit shift register LED driver designed to support
automotive LED applications. A built-in LED open and LED short diagnostic mechanism provides
enhanced safety protection. The device contains 16 channels with power DMOS transistor outputs.
Eight of the channels support LED fault diagnostics by configuring corresponding registers, the
device can drive 16 channels without diagnostics or 8 channels with diagnostics. The diagnostics
channels DIAGn must connect to DRAINn to realize LED diagnostics. A command error fault implies
that a channel is configured for LED diagnostics but a register write command has turned on the
channel at the same time. The device provides a cyclic redundancy check to verify register values
in the shift registers. In read-back mode, the device provides 6 bits of the CRC remainder. The MCU
can read back the CRC remainder and check if the remainder is correct to determine whether the
communication loop between MCU and device is good.
View datasheet View product folder