MBI1804 datasheet(7/10 Pages) ETC1

Part #	MBI1804

Description	ALL-WAYS-ON HIGH-POWER LED DRIVER

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	ETC1 [List of Unclassifed Manufacturers]

Direct Link

Logo

7 / 10 page

MBI1804

All-Ways-On

TM High-Power LED Driver

November 2004, V1.00.

- 7 -

Adjusting Output Current

The output current of each channel (IOUT) is set by an external resistor, Rext. The relationship between IOUT and Rext

is shown in the following figure.

Relationship between IOUT and Rext

0.00

50.00

100.00

150.00

200.00

250.00

300.00

350.00

400.00

500

1000

1500

2000

Rext (

Ω)

Also, the output current can be calculated from the equation:

VR-EXT = 1.26V；IOUT = (VR-EXT / Rext ) x 60= (1.26V / Rext ) x 60

where Rext is the resistance of the external resistor connected to R-EXT terminal and VR-EXT is the voltage of R-EXT

terminal. The magnitude of current (as a function of Rext) is around 210 mA at 360Ω and 105 mA at 720Ω.

VDS = 1.0V

Figure 5

MBI1804 Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers