Linear drivers from Diodes boost efficiency in LED strips

Three linear light emitting diode (LED) drivers from Diodes, the BCR401U, BCR402U and BCR405U, have been introduced by Diodes. The constant current regulators enable simple driving of low-current LED strips and panels in the commercial and industrial lighting sectors, says Diodes.

LED lighting offers improved efficiency and longer life for lighting applications including advertising, emergency, refrigeration, decorative and architectural, adds the company. Suitable for 12 and 24V linear LED strips, the BCR401U, BCR402U and BCR405U regulators increase light output efficiency, only requiring a 1.4V supply, allowing more LEDs in the string.

All three achieve regulation within ±10 per cent. They provide pre-set options of 10mA (BCR401U), 20mA (BCR402U), and 50mA (BCR405U) that can be adjusted up to 100mA. Diodes believes that these regulators simplify the design, minimise component count, and overall enhance system reliability by integrating the driver. 

Delivering a regulated current over a wide 1.4 to 40V supply, the BCR40xU diodes tolerate voltage spikes and LED short failures in strings, while preserving LED brightness and longevity. A negative temperature co-efficient reduces the LED current with rising temperature to help increase the LED lifespan by reducing dissipation. This additionally enables parallel device operation for increased current in applications requiring more than 100mA.

The BCR40xU diodes operate as a linear LED driver, minimising the likelihood of electromagnetic interference (EMI), which is particularly important in medical lighting and other sensitive applications, while LED brightness can be PWM controlled with less than one per cent duty cycle at 25kHz, for accurate dimming to low light levels, Diodes says.

The BCR401U, BCR402U and BCR405U LED drivers are offered in the industry-standard SOT-26 (SC74R) package. They provide pin-to-pin compatibility with other sources.

Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC/DC converters and controllers, DC/DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.

http://www.diodes.com

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