BL9581 Datasheet PDF

BELLING BL9581

The BL9581 is a continuous mode inductive step-down converter, 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 6V and 36V and provides an externally output current up to 1.2A. The BL9581 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current.

Part No.	BL9581
Datasheet	BL9581 Download
Manufacturer	BELLING
Description	High Brightness LED Driver
Buy	Stock & Price

FEATURES

z Simple low parts count z Internal 36V NDMOS switch z Up to 1.2A output current z Single pin on/off and brightness control using DC voltage or PWM z Soft Start z High efficiency (up to 97%) z Wide input voltage range: 6V to 36V z Output shutdown z Up to 1MHz switching frequency z Inherent open-circuit LED protection z Typical 3% output current accuracy z High-side current sense z Hysteretic control: no compensation z Adjustable constant LED current z Over temperature protection z Pb-free SOT23-5 packages

APPLICATIONS

z Low voltage halogen replacement LEDs z Automotive lighting z Low voltage industrial lighting z LED back-up lighting z Illuminated signs z LCD TV backlighting

DESCRIPTION

Depending upon supply voltage and external components, this can provides up to 24 watts of output power. Output current can be adjusted by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. During DC dimming, this will provide a continuous output current that is proportional to the external applied DC voltage.