SSL | Components | Electronics | Driver IC | Jan 08, 2020

Diodes' Ultra-Low Dropout Linear LED Driver to Extend Lighting Strips

Diodes Incorporated announced the BCR430UW6 linear LED driver with ultra-low dropout voltage and constant current regulation between 5 mA and 100 mA. This combination allows more LEDs to be driven from a low supply voltage, making the BCR430UW6 suitable for applications that require multiple LEDs to operate together, such as signage illumination and architectural lighting for commercial and retail installations.

•    LED Strips
•    LED Panel Displays
•    Architectural and Landscape Lighting
•    Mood and Decorative Lighting
•    Retail Lighting

Main Features:
•    LED Current Tolerance of ±5% at 95 mA Output Current
•    Thermal Protection Reduces LED Currentat Elevated Temperature
•    Low Typical Saturation Voltage of 115 mV at 50 mA
•    5 mA to100 mA AdjustableLED Current with an External Resistor
•    5 V to 42 V Supply Voltage
•    High Power1W Dissipation in SOT26
•    No External Capacitors Required for Stable Operation
•    LED Dimming Using PWM
•    Parallel Devices to Increase Regulated Current
•    Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•    Halogen and Antimony Free. "Green" Device (Note 3)

The ultra-low dropout voltage of 115 mV and low operating current of just 285 μA provides a greater level of system efficiency and scope to drive more LEDs per string reliably. These factors are particularly important in applications where the characteristics of the lighting are essential to the user experience, such as signage and architectural illumination.

The device requires no external power transistors or capacitors, reducing the overall BoM cost and increasing system stability. Long-term reliability is also improved through the robust design, which is tolerant to overvoltage levels resulting from faults in the LEDs or supply transients. Integrated thermal protection limits the output current in the event of high operating temperatures, avoiding operational failure and maximizing the working lifetime of the LEDs.

With an adjustable output current level between 5 mA and 100 mA, the BCR430UW6 can provide greater flexibility, allowing a single design to be used to drive various LED configurations. The output is highly stable, held at ±5% across temperature variations and supply voltage fluctuations. This stability delivers a uniform output lighting level under all operating conditions.  

Other advanced features include PWM-based dimming, an operating voltage range of 5 V to 42 V, and support for parallel operation to further increase the regulated output current.

The BCR430UW6 is provided in a SOT26 package and priced at $0.10 in 5000 piece quantities.

Further information is available at

About Diodes Incorporated:

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor's SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog, and mixed-signal semiconductor markets. 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. Diodes also has timing, connectivity, switching, and signal integrity solutions for high-speed signals. -

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See for more information about Diodes Incorporated's definitions of Halogen-and Antimony-free, "Green" and Lead-free.
3. Halogen-and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900 ppm chlorine (<1500 ppm total Br + Cl) and <1000 ppm antimony compounds