BCR421UW6：线性LED 驱动
| Part Number | Data Sheet | SPICE Model | Qualified to AECQ10x | PPAP Capable | Topology | Minimum Supply Voltage (V) | Maximum Supply Voltage (V) | Maximum VOUT (V) | Number of Channels | LED Current Sense Voltage (mV) | OutputCurrent (mA) | LED Current (mA) | Accuracy (%) | Frequency (kHz) | Efficiency (%) | Dimming | Temperature Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BCR421UW6 | BCR420UW6_BCR421UW6.pdf | BCR421UW6 | Yes | No | Linear LED Driver | 1.4 | 40 | 40 | 1 | 700 | 350 | 350 | 10 | 10 | - | PWM | -55 to +150 |
Description
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.
Application
- Automotive Interior Lighting
- Emergency Lighting
- Signage, Advertising, Decorative and Architectural Lighting
- Retail Lighting in Fridges, Freezer Cases and Vending Machines
Features
- LED Constant Current Regulator using NPN Emitter-Follower with Emitter Resistor to Current Limit
- Iout = 10mA ± 10% Constant Current (Preset)
- Iout up to 350mA adjustable with an External Resistor
- Vout = 40V Supply Voltage
- Pd up to 1W in SOT26 (SC-74)
- Negative temperature coefficient (NTC) reduces IOUT with increasing temperature
- Parallel Devices to Increase Regulated Current
- Totally Lead-Free & Fully RoHS Compliant
- Halogen and Antimony Free. “Green” Device
- Qualified to AEC-Q101 Standards for High Reliability
订购型号
- BCR421UW6-7
- BCR421UW6Q-7
SOT26 (SC74R)
.jpg "SOT26 (SC74R)")
- BCR420UW6_BCR421UW6.pdf BCR420UW6
