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参数资料
| 型号： | CAT3644HV3-GT2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 4CH QUAD MODE 16TQFN |
| 标准包装： | 2,000 |
| 系列： | QUAD-Mode® |
| 拓扑： | 线性（LDO），切换式电容器（充电泵） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.6MHz |
| 电源电压： | 2.5 V ~ 5.5 V |
| 输出电压： | 7V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
CAT3644
LED Current Selection
LED current + 132
At power ? up, the initial LED current is set to full scale
(100% brightness) by the external resistor R SET as follows:
0.6 V
R SET
The EN/DIM pin has two primary functions. One function
enables and disables the device. The other function is LED
current dimming with six different levels by pulsing the
input signal, as shown on Figure 26. On each consecutive
pulse rising edge, the LED current is divided by half to 50%,
then 25%, 12.5%, 6.25% and 3.125% dimming levels.
Pulses faster than the minimum T LO may be ignored and
filtered by the device. Pulses longer than the maximum T LO
may shutdown the device.
The LED driver enters a “zero current” shutdown mode if
EN/DIM is held low for 1.5 ms or more.
EN/DIM
T SETUP
T LED
100%
T HI
T LO
100%
T PWRDWN
LED
Current
Shutdown
50%
25%
12.5% 6.25%
3.12%
Shutdown
Figure 26. EN/DIM Digital Dimming Timing Diagram
Table 7. LED CURRENT DIMMING LEVELS
EN/DIM # of Pulses *
EN = High
1 st
2 nd
3 rd
4 th
5 th
6 th
x th
R SET Gain
132
66
33
16.5
8.25
4.125
132
Device cycling through gain selection
LED Current
132 x 0.6 V / R SET
66 x 0.6 V / R SET
33 x 0.6 V / R SET
16.5 x 0.6 V / R SET
8.25 x 0.6 V / R SET
4.125 x 0.6 V / R SET
132 x 0.6 V / R SET
GAIN x 0.6 V / R SET
* The gain is changed on the rising edges of the EN/DIM input.
http://onsemi.com
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT3644HV3G-T2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT3644HV3-T2 | 功能描述:LED照明驱动器 4 CHANNEL QUAD-MODE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| CAT3647 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:3-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver with 32 Dimming Levels |
| CAT3647HV3-GT2 | 功能描述:LED照明驱动器 Ultra Hi Eff Quad LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| CAT3648 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:4-Channel Ultra High Efficiency Quad-Mode LED Driver with 32 Dimming Levels |
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