10mA-150mA, Adjustable, SOT26
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The BCR420U/BCR421U monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for linear LED driving. The device regulates with a preset 10mA nominal that can be adjusted with external resistor up to 350mA. It is designed for driving LEDs in strings and will reduce current at increasing temperatures to self-protect. Operating as a series linear CCR for LED string current control, it can be used in multiple applications, as long as the maximum supply voltage to the device < 40V.
With the low-side control, the BCR421U has an Enable (EN) pin which can be pulse-width modulated (PWM) up to 10 kHz by a micro controller for LED dimming.
With no need for additional external components, this CCR is fully integrated into a SOT26 minimizing PCB area and component count.
| AEC Qualified | No |
|---|---|
| Compliance (Only Automotive supports PPAP) | Standard |
| Topology | Linear LED Driver |
| Minimum Supply Voltage (V) | 1.4 V |
| Maximum Supply Voltage (V) | 40 V |
| Maximum VOUT (V) | 40 V |
| Number of Channels | 1 |
| LED Current Sense Voltage (mV) | 700 mV |
| Output Current (mA) | 350 mA |
| Channel Max. Output Current (mA) | 10 Preset mA |
| Accuracy (%) | 10 % |
| Dimming | PWM by external transistor |
| Temperature Range (°C) | -55 to 150 °C |
A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2456 | 2020-05-29 | 2020-08-29 | Qualification of Internal "Diodes Technology (Cheng Du) Company Limited" (CAT) as an Additional Assembly & Test Site Using Copper or Palladium Coated Copper Bond Wire with Standardization of Assembly Bill of Materials, Or as an Additional Wafer Plating, Back Grinding and Back Metal Process Source, and Qualification of Additional Wafer Source for Select Discrete Products. |
