DC/DC Step-down Converter， 40V Synchronous Constant Current LED Driver

Introduction

BLL2770 is a 40V synchronous constant current buck LED driver, with 55mΩ High-Side and 20mΩ Low-Side MOSFETs integrated, minimal external component requirement and high efficiency,ideal for car lamp applications.
Adjustable Output Current up to 3.5A with ±3% accuracy. RISEN resistor is used to set the output current.
No external compensation component needed. 135kHz switching frequency with jitter function improves EMI performance.
Internal thermal regulation prevents the chip from overheating without shutting down the output.
Input under voltage lock-out protection disable the chip when input voltage lower than 7V.

 

Advantage

1、Build in power MOSFETs
2、Adjustable output current, IFB=150mV
3、Constant current accuracy: ±3%
4、No external compensation needed
5、Internal thermal regulation
6、Under voltage lock-out
7、Minimum external components
8、Available in SOP8 package

 

Applications

LED lamp for automobile

 

Product Manuals

Download product datasheet