Myalarm V-LED1 Manual de usuario descargar pdf

Jul31-07 RevT SP7611A/7612A/7614A Low Dropout Linear LED driver  2007 Sipex Corporation

Page 1

FEATURES

 LED Drivers for parallel connected LEDs

 No EMI, no switching noise

 Integrated current matching

 PWM and Analog brightness control

 Enable/Shutdown control

 Shutdown current < 0.01µA

 Tiny, RoHS Compliant Lead-Free

Packages: SC-70, 2x2 TDFN

Part # Channels

Maximum Steady

State Current per LED

SP7611A 4 40mA

SP7612A 3 40mA

SP7614A

80mA

DESCRIPTION

The SP761X driver family provides a simple solution for a matched current source for any color LED.

The current in the LEDs can be programmed by an external resistor. The SP7611A is capable of

driving four LEDs, while the SP7612A can drive three LEDs. The SP7614A is designed to drive two

high current LEDs. LED1 should always be connected to an LED and never left open in order to have

the other LEDs driven with a matched current to LED1. The SP7612A and SP7614A feature Enable

pins for flexible on/off control and PWM dimming. SP7612A/4A has extremely low (0.01uA typical)

shutdown current, prolonging the battery life and giving the longest standby period possible in today's

modern design. SP761X driver family is available in a small footprint 6-pin SC-70 package as well as

the 6-pin 2x2 TDFN.

TYPICAL APPLICATION SCHEMATIC

Solved by

2-4 Channel Low Dropout Linear LED Driver

SP7611A

, SP7612A

, S

P7614A

Pin outs for SP7611A and SP7612A on page 3

APPLICATIONS

 Ultra low cost Handsets

 PDA, DSC, MP3 players

 Handheld Computers

 LCD Display Modules

 Keyboard Backlight

 LCD Backlight

LED1 LED2

GND

CTRL

ENABLE

CONTROL

SET

SP7614A

SET

SP7614A

6 Pin SC70

CTRL

N/C

GND

VLED1

ON/OFF

VLED2

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