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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
Oct 23-06
V
CC
EN
GND
SP7615
LED1
廬
LED2
LED3
LED4
R1
I
SET
SP7615 Four Channel Constant Current LED Driver
漏 Copyright 2006 Sipex Corporation
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