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SP7619A

Sipex Corporation
Part Number SP7619A
Manufacturer Sipex Corporation
Description Constant Current LED Driver
Published Aug 27, 2007
Detailed Description www.DataSheet4U.comSolved by TM SP7619/19A Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout vol...
Datasheet PDF File SP7619A PDF File

SP7619A
SP7619A

Overview
www.
DataSheet4U.
comSolved by TM SP7619/19A Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout voltage (60mV@200mA) Accurate current regulation down to dropout voltage No external components Selectable output current levels: 200mA & 500mA (700mA for SP7619A) Power-saving shutdown mode of 1µA Fast turn-on (<50µs) Timeout function to protect the LED Thermal Shutdown protection RoHS compliant, Lead Free packaging: Space saving 2mmx3mm 8pin DFN LED LED VCC EN 1 2 3 4 SP7619 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 GENERAL DESCRIPTION The SP7619 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 across a range of input voltages.
The SP7619 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 set at 200mA at torch mode or 500mA (700mA SP7619A) at flash mode by selecting CTRL pin low/high respectively.
Dimming or shutdown can be done by feeding a PWM signal to the EN pin.
Fast EN turn-on/off time allows for very fast dimming frequencies, completely eliminating flicker.
The built-in thermal protection automatically stops LED current to prevent overheating.
A timeout function serves as a fail safe, shutting down the output at 500mA (700mA) current after 4 seconds of continuous operation if the enable input is not cycled.
The Enable pin should be cycled HIGH/LOW/HIGH to restart the driver.
TYPICAL APPLICATION CIRCUIT Feb 9-07 Rev E Constant Current LED Driver © 2007 Sipex Corporation  Supply Voltage (Vcc) .
……………………….
.
6.
0V Input Voltage at any input .
….
-0.
6V to Vcc +0.
5V 8-pin DFN Package thermal resistance 59°C/W Junction Temperature .
.
.
-40°C to +...


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