參數(shù)資料
型號： CAT4004
英文描述： 4-Channel Constant Current LED Driver with EZDi TM
中文描述： 4通道恒定電流LED驅(qū)動EZDi商標
文件頁數(shù)： 8/11頁
文件大?。?/td> 276K
代理商： CAT4004
CAT4004
Doc. No. 5024 Rev. A
8
2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
BLOCK DIAGRAM
4 Current Sink
Regulators
Current
Setting DAC
Undervoltage
Lockout
Register
Serial
Interface
RSET
100k
EN/DIM
GND
V
IN
VIN
L
L
L
L
Reference
Voltage
Figure 2. CAT4004 Functional Block Diagram
BASIC OPERATION
The CAT4004 uses four tightly matched current
sinks to accurately regulate LED current in each
channel proportional to the current sourced from the
RSET pin.
SET
LED
I
R
V
6
GAIN
×
=
There are six different gain settings for LED
brightness that can be set through the EN/DIM pin.
The default gain on power-up is 132. Tight current
regulation for all channels is possible over a wide
range of input and LED voltages due to independent
current sensing circuitry on each channel.
Each LED channel needs a minimum of 150mV
headroom to sink constant regulated current. If the
input supply falls below 1.8V, the under-voltage
lockout circuit disables all LED channels and resets
the circuit to default values. Any unused LED
channels should be left open.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CAT4004_08 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel Constant Current LED Driver with EZDim⑩
CAT4004A 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Constant Current LED Driver with 32 Dimming Levels and Rset
CAT4004AHU2-GT3 功能描述:LED照明驅(qū)動器 LED DR 4 CH EZ DIM I/F RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
CAT4004AHU2-GT3B 功能描述:LED照明驅(qū)動器 322.4V to 5.5V RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
CAT4004BHU2-GT3 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Constant Current Programmable LED Driver with 32 Dimming Levels
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