2010/04/10

Ver.2

Page 1

SP1821

Four Channels Constant Current LED Driver

DESCRIPTION

APPLICATIONS

The SP1821 is a linear constant current driver designed

to drive multiple LEDs in series from a high input

voltage rail. The driver acts as a high current matched,

four-channel current source ensuring constant LED

current for a range of input voltages. The device can

drive up to 25mA load current per string with an

external resistor. The SP1821 can provide lowest cost

for various applications. Internal thermal protection

automatically turns off LED current to prevent

overheating. The dimming can be achieved by

the EN pin. The device can be shut down by setting

Enable low.

MR16 and other decoration light source

General reading lighting

Display Backlight

12V Battery powered devices

FEATURES

PIN CONFIGURATION(SOP – 8P)

PART MARKING

Low Cost LED Driver

Constant Current Output

Four Channels LED Driver Provides Matching

LED Current

Low Quiescent Current

Disconnects LEDs in Shutdown Mode

Thermal Shut Down Protection

Current Adjustable via external resistor

Dimming Control thru either Enable or Iset