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參數(shù)資料
| 型號(hào)： | SP7615 |
| 英文描述： | Four Channel Constant Current LED Driver |
| 中文描述： | 4通道恒定電流LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 244K |
| 代理商： | SP7615 |
3
Date: 08/31/05
SP7615 Four Channel Constant Current LED Driver Copyright 2005 Sipex Corporation
BLOCK DIAGRAM
Introduction
The SP7615 is a four channel constant current
source LED driver with programmable output
current level. The design consists of a regulator
bandgap, voltage to current converter, and
output mirror drivers. The bandgap ensures
good performance over voltage and
temperature. The four outputs are tightly
coupled allowing for excellent channel
matching.
Thermal Shutdown
The SP7615 uses a thermal comparator to
monitor the system temperature shutting the
device down if the internal temperature reaches
150
o
C. The device will remain off until the
internal temperature drops below 130
o
C.
Enable
The device has an enable function that is
designed for TTL level inputs. This input will
also track the
V
CC
pin so levels up to
V
CC
are
THEORY OF OPERATION
Figure 1. SP7615 Block Diagram
V
CC
GND
EN
I
SET
LED1
LED2
LED3
LED4
Bias
Driver
Thermal
Shutdown
V to I
Converter
acceptable. The enable pin can also be used to
control the LED brightness with a pulse width
modulated control signal. Duty Cycle or PWM
control of the LED current maintains constant
LED color while brightness is changing. The
SP7615 responds in less than 10
μ
s to PWM
signals applied to this pin.
I
SET
Pin
The I
SET
pin is the servo point of an amplifier
configured as a voltage to current converter.
The voltage at this pin trips servos to the
internal bandgap potential. A set resistor can
be connected from the I
pin to ground to
generate a reference current for the following
current gain stages. A current could
alternately be applied to this pin in the form
of a current source or current output DAC.
This pin can also have a PWM signal applied
to control the LED brightness.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP7615_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Four Channel Constant Current LED Driver |
| SP7615_1 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7615EB | 功能描述:LED 照明開(kāi)發(fā)工具 LDO LED Drvr for any Color LED w/A Shtdwn RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| SP7615ER | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7615ER/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Four Channel Constant Current LED Driver |
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