BCR420U & BCR421U are constant current regulators (CCR) for driving low power LED strings by using NPN Emitter-Follower with Emitter Resistor to Current Limit.
- 10mA to 350mA
Adjustable CCR enables platform designs based on a single device to used across multiple LED strip applications – easing manufacturer’s overall qualification process.
- Increased Reliability
Monolithically integrating a transistor, diodes and resistors both simplifies the system by reducing component count and increases overall reliability.
- 1.4 to 40V Supply Voltage
Low voltage overhead with sufficient headroom for over - voltage conditions such as LEDs failing short.
- Negative Temperature Coefficient
Self - protects and allows current sharing between parallel CCRs.
- BCR421U with PWM
Enable function that can adjust the light output level by PWM up to 10kHz