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Automotive Multi Channel LED Driver Reference Design for HVAC HMI
TIDA-01500
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Automotive Multichannel LED Driver for HVAC HMI Reference Design (Rev. A)
(PDF 1137 KB)
11 Jan 2019
Description
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
See the Important Notice and Disclaimer covering reference designs and other TI resources.
