Opto-Electronics


Driver for low-current LED strips

30 June 2020 Opto-Electronics

Infineon Technologies’ new BCR431U is a constant-current linear LED driver IC providing low voltage drop performance for regulating LED current. It is the second device released in the new-generation BCR family with low voltage drop focusing on low current designs of up to 37 mA. Typical applications for the new BCR431U include LED strips, channel letters, architectural LED lighting, LED displays, as well as emergency, retail and appliance lighting.

The voltage drop at the integrated driver IC can go down to 105 mV at 15 mA. This is unmatched in the industry and provides far more flexibility in lighting applications. It improves the overall efficiency and provides the voltage headroom required to compensate for the LED forward voltage tolerances and variances in the supply voltage.

The BRCU431U allows either to add additional LEDs to lighting designs, for example, seven instead of six LEDs in series driven by one IC. Or it can be used to increase the overall length of an LED strip design from, for example, 5 to 7 m. Overall, longer LED strips mean fewer feeding points and less effort in installation.

The LED current is easily adjustable via a high-ohmic resistor on a dedicated pin with an IC supply voltage ranging between 6 V and 42 V. For safe and reliable operation and to extend the overall LED system’s lifetime, a smart over-temperature controlling circuit keeps the current constant even at rising temperature. At the same time, it reduces the LED current only when the junction temperature gets very high.

The BCR431U features a dimming capability of down to 1%, which makes it attractive for a great variety of LED strip designs.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Shorten your design cycle
Altron Arrow DSP, Micros & Memory
The CANHUBK344 evaluation board from NXP is ideal for mobile robotics and industrial automation applications.

Read more...
High-speed PIN diode
Altron Arrow Analogue, Mixed Signal, LSI
Vishay’s new high-speed Silicon PIN diode is able to detect both visible and near infra-red radiation over a wide spectrum range from 350 to 1100 nm.

Read more...
The next evolutionary step in customisable logic
Altron Arrow DSP, Micros & Memory
To address the expanding need for increasing levels of customisation in embedded applications, Microchip Technology is offering a tailored hardware solution with the launch of its PIC16F13145 family of microcontrollers.

Read more...
High-quality optoelectronics components
Opto-Electronics
LEDs make up the bulk of Lite-On’s product range, and all popular types are manufactured from the ubiquitous round LEDs designed for through-hole mounting to state-of-the-art structures, integrated with programmable control systems.

Read more...
CNH data output devices for AI applications
Altron Arrow Test & Measurement
STMicroelectronics’ CH family of time-of-flight sensor devices feature compact and normalised histogram (CNH) data output for artificial intelligence applications requiring raw data from a high-performance multizone ToF sensor.

Read more...
LTE 4G compact low profile compact antenna
Altron Arrow Telecoms, Datacoms, Wireless, IoT
The Platch LTE 4G compact low-profile antenna is designed for pit lid, ground level, and height-critical LTE/4G applications.

Read more...
Wireless MCU with 15 years of battery life
Altron Arrow DSP, Micros & Memory
ST has integrated an industry-unique ultra-low-power radio which the MCU can power-down to save energy while listening continuously for a wake-up signal.

Read more...
High bandwidth current-sense amplifier
Altron Arrow DSP, Micros & Memory
The AD8410A from Analog Devices is a high voltage, high-bandwidth current-sense amplifier which features an initial gain of 20 V/V.

Read more...
Microcontroller with Bluetooth LE 5.3
Altron Arrow News
The STM32WBA 32-bit Wireless series from STMicroelectronics brings designers the performance, efficiency, and security required for Bluetooth Low Energy 5.3-enabled applications. The STM32WBA offers essential ...

Read more...
Comprehensive AI computing solution
Altron Arrow News
Powered by the NVIDIA Jetson AGX Orin, the BOXER-8640AI fanless Box PC from AAEON Technology brings AI capabilities to the edge. The NVIDIA Jetson AGX Orin’s Ampere architecture boasts 1792 CUDA and 56 ...

Read more...