欢迎访问ic37.com |
会员登录 免费注册
发布采购

CAT3643HV3-GT2 参数 Datasheet PDF下载

CAT3643HV3-GT2图片预览
型号: CAT3643HV3-GT2
PDF下载: 下载PDF文件 查看货源
内容描述: 3通道超高效率四Mode⑩ LED驱动器 [3-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver]
分类和应用: 驱动器接口集成电路
文件页数/大小: 17 页 / 328 K
品牌: CATALYST [ CATALYST SEMICONDUCTOR ]
 浏览型号CAT3643HV3-GT2的Datasheet PDF文件第5页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第6页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第7页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第8页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第10页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第11页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第12页浏览型号CAT3643HV3-GT2的Datasheet PDF文件第13页  
CAT3643  
PIN DESCRIPTION  
Name  
LED1  
LED2  
LED3  
RSET  
Function  
LED1 cathode terminal.  
LED2 cathode terminal.  
LED3 cathode terminal.  
Connect resistor RSET to set the LED current.  
EN/DIM Device enable (active high) and Dimming Control.  
VOUT  
VIN  
Charge pump output connected to the LED anodes.  
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  
Ground Reference  
C1+  
C1-  
C2+  
C2-  
GND  
NC  
Not connected inside package.  
GND  
Connect to GND on the PCB.  
PIN FUNCTION  
VIN is the supply pin for the charge pump. A small  
1μF 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.  
C1+, C1- are connected to each side of the ceramic  
bucket capacitor C1.  
C2+, C2- are connected to each side of the ceramic  
bucket capacitor C2.  
LED1, LED2, LED3 provide the internal regulated  
current sources for each of the LED cathodes. These  
pins enter high-impedance zero current state when-  
ever the device is placed in 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 RSET. To place the device into “zero  
current” shutdown mode, the EN/DIM pin must be  
held low for at least 1.5ms.  
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 (RSET) 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.  
VOUT is the charge pump output that is connected to  
the LED anodes. A small 1μF ceramic bypass  
capacitor is required between the VOUT 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.  
© Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
9
Doc. No. MD-5022 Rev. E