TIDA-01500

Automotive Multi Channel LED Driver Reference Design for HVAC HMI

TIDA-01500

Design files

Overview

In HVAC (heating, ventilation, and air conditioning) HMI (human machine interface) the displays and buttons are illuminated with many of LEDs. The drive circuit for these LEDs are traditionally realized in a discreet way so that an MCU drives external low side BJTs that sink current, limited by series resistor, to the LEDs. The BJTs may be driven with a PWM signal in order to get the dimming effect or they could be used simply like an on/off switch. This reference design is an alternative cost-effective LED driver solution capable of driving multiple LEDs without using current-limiting resistors. The reference design allows the designer to individually adjust the current, as well as the PWM-dimming signal, in each diode excluding those that are connected in series to one pin.

Features
  • Configurable 16-channel LED driver
  • Independent control of each channel
  • LED dimming adjustment to the ambient light intensity
  • Constant current control

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDD5A.PDF (1236 K)

Reference design overview and verified performance test data

TIDRTN6.PDF (245 K)

Detailed schematic diagram for design layout and components

TIDRTN7.PDF (62 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRTN8.PDF (244 K)

Detailed overview of design layout for component placement

TIDRTO0.ZIP (873 K)

Files used for 3D models or 2D drawings of IC components

TIDCE16.ZIP (376 K)

Design file that contains information on physical board layer of design PCB

TIDRTN9.PDF (580 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Ambient light sensors

OPT3001-Q1Automotive digital ambient light sensor (ALS) with high-precision human-eye response

Data sheet: PDF | HTML
Automotive LED drivers

TLC59116-Q1Automotive 16-channel FM+ I2C-Bus constant-current LED sink driver

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS709-Q1Automotive 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Automotive Multichannel LED Driver for HVAC HMI Reference Design (Rev. A) Jan. 11, 2019

Related design resources

Hardware development

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MSP-EXP430G2 MSP430G2 LaunchPad™ development kit

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