10mA-350mA, Adjustable, SOT26
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he 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 | Micro PWM controlled |
| 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-2495 | 2021-03-31 | 2021-07-01 | Qualification of Additional Assembly & Test Sites and Additional Wafer Back Grinding and Back Metal Process Source for Select Discrete Products |
