Diodes Incorporated

AL8841Q Automotive Buck LED Drivers

Diodes' 40 V dimming LED drivers are available in enhanced thermal and small-footprint packages

Image of Diodes' AL8841Q Buck LED DriversDiodes' AL8841Q is a hysteretic-mode DC/DC step-down LED driver that is designed for driving single or multiple series-connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 4.5 V and 40 V, and provides an externally adjustable output current of up to 1 A for the TSOT25 and 1.5 A for the MSOP-8EP packages. The AL8841Q integrates the power switch using an external resistor to set the LED current. It provides a simple and small footprint solution using a minimum of four external components.

The CTRL pin accepts a DC analog voltage signal or a PWM digital signal to provide a simple way of adjusting LED brightness. The CTRL pin can also be used to adjust the AL8841Q’s soft-start time and can be adjusted using an external capacitor between the CTRL and ground. A voltage of 0.3 V or lower to the CTRL pin stops the switching but does not place the device into a low-power standby state, thereby providing a faster PWM dimming response than the AL8860Q/61Q.The AL8841Q is available in a thermally-enhanced MSOP-8EP package and a small-footprint TSOT25 package.

Features
  • Reliable cost-effective solution for automotive LED lighting
    • Wide input voltage range: 4.5 V to 40 V across the entire 12 V battery range
  • Integrated low 200 mΩ RDS(ON) power MOSFET
    • Achieves up to 97% high efficiency and supports a wide ambient temperature range
  • Supports PWM or analog dimming:
    • Enables the CTRL pin to simultaneously accept both dimming modes
  • Full protections: LED open/short and overtemperature shutdown
  • Packages: MSOP-8EP for thermal enhancement and TSOT25 for small footprints
Applications
  • Automotive LED lamps:
    • Daytime running lights
    • Fog lights
    • Turn/stop signals
    • Dimmable interior lights
    • Puddle lamps

AL8841Q Automotive Buck LED Drivers

图片制造商零件编号描述电流 - 输出/通道封装/外壳供应商器件封装可供货数量价格查看详情
LED MV INT SWITCH TSOT25 T&R 3KAL8841QWT-7LED MV INT SWITCH TSOT25 T&R 3K1ASOT-23-5 细型，TSOT-23-5TSOT-252990 - 立即发货
3000 - 厂方库存		$4.76查看详情
LED MV INT SWITCH MSOP-8EP T&R 2AL8841QMP-13LED MV INT SWITCH MSOP-8EP T&R 21.5A8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘8-MSOP-EP2488 - 立即发货
5000 - 厂方库存		$5.01查看详情
发布日期： 2024-06-27