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參數(shù)資料
| 型號： | CAT3644 |
| 英文描述： | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| 中文描述： | 4通道超高效率的Quad - Mode商標LED驅動器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 294K |
| 代理商： | CAT3644 |
CAT3644
Doc. No. 5023, Rev. B
8
2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
PIN DESCRIPTION
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TAB
Name
LED2
LED3
LED4
RSET
EN/DIM
VOUT
NC
VIN
C1+
C1-
C2+
C2-
NC
NC
GND
LED1
GND
Function
LED2 cathode terminal.
LED3 cathode terminal.
LED4 cathode terminal.
Connect resistor RSET to set the LED current.
Device enable (active high) and Dimming Control.
Charge pump output connected to the LED anodes.
Not connected inside the package.
Charge pump input, connect to battery or supply.
Bucket capacitor 1 Positive terminal
Bucket capacitor 1 Negative terminal
Bucket capacitor 2 Positive terminal
Bucket capacitor 2 Negative terminal
Not connected inside the package.
Not connected inside the package.
Ground Reference
LED1 cathode terminal.
Connect to GND on the PCB.
PIN FUNCTION
VIN
is the supply pin for the charge pump. A small
1
μ
F ceramic bypass capacitor is required between the
VIN pin and ground near the device. The operating
input voltage range is from 2.5V to 5.5V. Whenever
the input supply falls below the under-voltage
threshold (1.8V), all the LED channels are disabled
and the device enters shutdown mode.
EN/DIM
is the enable and one wire dimming input for
all LED channels. Levels of logic high and logic low
are set at 1.3V and 0.4V respectively. When EN/DIM
is initially taken high, the device becomes enabled
and all LED currents are set to the full scale according
to the resistor R
SET
. To place the device into “zero
current” shutdown mode, the EN/DIM pin must be
held low for at least 1.5ms.
VOUT
is the charge pump output that is connected to
the LED anodes. A small 1
μ
F ceramic bypass
capacitor is required between the V
OUT
pin and ground
near the device.
GND
is the ground reference for the charge pump. The
pin must be connected to the ground plane on the PCB.
C1+, C1-
are connected to each side of the ceramic
bucket capacitor C
1
.
C2+, C2-
are connected to each side of the ceramic
bucket capacitor C
2
.
LED1 to LED4
provide the internal regulated current
source for each of the LED cathodes. These pins
enter high-impedance zero current state whenever the
device is placed in shutdown mode.
TAB
is the exposed pad underneath the package. For
best thermal performance, the tab should be soldered
to the PCB and connected to the ground plane.
RSET
is connected to the resistor (R
SET
) to set the full
scale current for the LEDs. The voltage at this pin
regulated to 0.6V. The ground side of the external
resistor should be star connected back to the GND of
the PCB. In shutdown mode, RSET beomes high
impedance.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3644_0710 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver |
| CAT3644HV3 | 制造商:ON Semiconductor 功能描述:IC 4-LED DRIVER QUAD HI EFFICIENCY |
| CAT3644HV3G | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT3644HV3-GT2 | 功能描述:LED照明驅動器 LED Driver,Quad mode,4 ch 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3644HV3G-T2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
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