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SP7615 Datasheet

  • SP7615

  • Four Channel Constant Current LED Driver

  • 10頁

  • SIPEX

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廬
Preliminary
SP7615
Four Channel Constant Current LED Driver
FEATURES
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Cost Effective LED driver
VCC
1
8
LED1
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Constant current output ideal for Driving LED strings
SP7615
7
LED2
EN
2
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Four Channel LED Driver provides matched LED
6
LED3
GND
3
8 Pin DFN
current
ISET
4
5
LED4
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Current adjusted via an external resistor
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PWM dimming possible
Now Available in Lead Free Packaging
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Small 2mm x 3mm DFN package
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Outputs can be connected in parallel to
APPLICATIONS
increase drive
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Constant current for wide cathode voltage range
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Next Generation Mobile Phones
(1.0V to 16V)
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PDA, DSC, MP3 Players
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Highly integrated design, minimal components
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Handheld Computers
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LCD Display Modules
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Thermal shutdown protects the driver
鈻?/div>
Keyboard Backlight
鈻?/div>
LED Displays
DESCRIPTION
The SP7615 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 SP7615 allows
implementing the lowest cost LED driver for a variety of applications. Internal circuitry
maintains the pre-set constant current output for a wide voltage range at the LED outputs
(LED1,2,3,4). LED current can be adjusted up to 125mA per string with an external resistor.
The dimming can be achieved by controlling the
I
SET
input or by feeding a PWM signal to
the EN pin. Fast EN turn-on and turn-off time allows for very fast PWM dimming frequencies,
completely eliminating flicker. The built-in thermal protection automatically adjusts LED
current to prevent overheating.
TYPICAL APPLICATION SCHEMATIC
V
CC
EN
C1
1n
GND
Date: 08/31/05
V
CC
EN
GND
SP7615
LED1
廬
LED2
LED3
LED4
R1
I
SET
SP7615 Four Channel Constant Current LED Driver
漏 Copyright 2005 Sipex Corporation
1

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