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SP7618

Part Number	SP7618
Manufacturer	Sipex Corporation
Description	Constant Current LED Driver
Published	Feb 9, 2007
Detailed Description	www.DataSheet4U.com Solved by SP7618 TM Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout vo...
Datasheet	SP7618 PDF File

Overview

www.
DataSheet4U.
com Solved by SP7618 TM Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout voltage (100mV @ 1A) Accurate current regulation down to dropout voltage No external components Built-in current DAC Output current adjustable with 33.
3 mA/steps Power-saving shutdown mode of 1µA Fast turn-on (<50µs) Timeout function to protect the LED Thermal Shutdown protection 1A current capability RoHS compliant, Lead Free packaging: Space saving 2mmx3mm 8pin DFN LED LED VCC EN 1 2 3 4 SP7618 8 Pin DFN 8 GNDP 7 GNDP 6 GND 5 CTRL ■ ■ ■ ■ ■ APPLICATIONS Next Generation Mobile Phones PDA, DSC, MP3 Players Handheld Computers LCD Display Modules Keyboard Backlight GENERAL DESCRIPTION The SP7618 is a linear, low-side constant-current driver designed to drive high power LEDs from an input voltage rail.
The driver acts as a current source, ensuring constant LED current for a range of input voltages.
The SP7618 allows implementing the lowest cost LED driver for a variety of applications.
Internal circuitry maintains the preset constant current output for a wide voltage range at the LED input.
The LED current can be adjusted up to 1033mA with an external clock applied to the CTRL pin.
The built-in thermal protection automatically stops LED current to prevent overheating.
A timeout function serves as a failsafe, shutting down the output for currents greater than 266mA after 4 seconds of continuous operation if the enable input is not cycled.
The part can be shut down by using the EN pin, or sent into Sleep Mode holding the CTRL pin low for more than 100µS.
TYPICAL APPLICATION CIRCUIT Date: Dec 5-06 Rev E Constant Current LED Driver © 2006 Sipex Corporation Supply Voltage (Vcc) .
……………………….
.
6.
0V Input Voltage at any input .
….
-0.
6V to Vcc +0.
5V 8-pin DFN Package Thermal Resistance.
.
590C/W Junction Temperature -40 0C to +170 0C* Storage Temperature .
.
……….
.
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-65°C to +150°C Soldering Temperature .
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.
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