Components | Electronics | Driver IC | Automotive | Nov 08, 2018

Infineon Automotive LED Driver Provides Most Flexible LED Load Diagnosis

LED lighting is taking over on the roads. It enables new design trends in cars, such as flexible styling and animation, and increases safety in traffic. If LEDs fail, this affects the reliability of the light. With LITIX™ Basic+, a new LED driver family , Infineon is launching the most flexible single LED short circuit diagnostic feature available on the market at Electronica 2018. The new Active Retry function mode reduces the likelihood of misdiagnoses. This can save drivers unnecessary garage visits.

The American market and many German car manufacturers are now demanding LED drivers that are able to detect single LED short circuits. The LITIX Basic+ family includes three devices with this feature: TLD2132-1EP with one input and one output channel (1in/1out), TLD2131-3EP (1in/3out) and TLD2331-3EP (3in/3out). For fault diagnosis, they compare the voltage of the LED chain with a freely configurable reference voltage. The reference voltage can be adjusted by means of a resistor depending on the LEDs used and the expected working range.

In case of an error, the LED driver reports the status, e.g. to a microcontroller. Depending on the diagnostic requests from the system, it either deactivates the affected channel or leaves it activated. Unlike other solutions on the market, the LITIX Basic+ devices have the additional Active Retry option when the channel is deactivated. Active Retry describes the cyclic scanning of the LEDs by briefly reactivating the channels. This allows an automatic restart if the error condition no longer exists.

In addition to the single LED short circuit, LITIX Basic+ products detect both open load faults and short circuit to ground faults. Again, the diagnosis is flexibly configurable.

The LITIX Basic+ LED driver family consists of a total of six devices (single and three-channel versions) and supports an LED current range from 5 mA up to 360 mA. In addition to the devices with single LED short circuit detection, it offers two devices with an integrated PWM timer module (pulse width modulation): TLD2141-3EP (1in/3out) and TLD2142-1EP (1in/1out). This allows combined tail light functions (such as brake and tail light) to be implemented cost-effectively. The required light intensity is achieved precisely thanks to the pulse width modulation. With the TLD1114-1EP (1in/1out) device, the integrated power shift function allows power loss to be dissipated externally. Infineon LITIX Basic+ LED drivers complement the successful LITIX Basic family already on the market.

Availability:

The products of the LITIX Basic+ family will be available to order from December.
Further information is available at www.infineon.com/litix-basicplus

About Infineon Technologies AG:

Infineon Technologies AG is a world leader in semiconductor solutions that make life easier, safer and greener. Microelectronics from Infineon is the key to a better future. In the 2015 fiscal year (ending September 30), the company reported sales of about €5.8 billion with some 35,400 employees worldwide. Infineon is listed on the Frankfurt Stock Exchange (ticker symbol: IFX) and in the USA on the over-the-counter market OTCQX International Premier (ticker symbol: IFNNY). - www.infineon.com

FEATURED

Nationstar's UV LED - a Pioneer in the DUV Sterilization Industry

Nationstar's UV LED - a Pioneer in the DUV Sterilization Industry Since 2016, NATIONSTAR has launched near-ultraviolet LED, deep-ultraviolet LED and modules, with wide wavelength range, high reliability and good feedback in the market. At present, we have established partnerships with many well-known manufacturers. Read more »

FEATURED

Industry Leading LUXEON 5050 LED Gets Performance Boost

Industry Leading LUXEON 5050 LED Gets Performance Boost Streetlights and high-bay fixtures require high flux and efficacy to meet the ever-increasing demands for system efficiency and energy cost reduction for these applications. Today, LUXEON 5050 LEDs received an upgrade in both flux and efficacy. Typical performance is now 675 lm with 172 lm/W in ... Read more »

FEATURED

Cree® XLamp® XM-L3 LEDs – More Output & Reliability

Cree® XLamp® XM-L3 LEDs – More Output & Reliability The XLamp® XM-L3 LED delivers a massive 55% upgrade in maximum light output over the XM L2 LED, providing a single-die LED point source for precise optical control. The XM-L3 LED shares the same mechanical and optical footprint as the original XM-L® and XM-L2 LEDs, providing a seamless upgrade path ... Read more »