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| 型号： | CAT3647HV3-GT2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16-TQFN |
| 标准包装： | 1 |
| 系列： | QUAD-Mode® |
| 拓扑： | 切换式电容器（充电泵） |
| 输出数： | 3 |
| 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 |
| 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： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 805 (CN2011-ZH PDF) |
| 其它名称： | CAT3647HV3-GT2DKR |
CAT3647
LED Current Selection
After power-up, the LED current is set by the external
resistor (R SET ) value and the number of pulses (n) on the
EN/DIM input as follows:
Table 7. DIMMING LEVELS
Full Scale Current in %
100
Dimming Pulses [n]
0
LED current + 125
0.6 V
R SET
31 * n
31
97
94
1
2
The full scale current is calculated from the above formula
with n equal to zero.
The EN/DIM pin has two primary functions. One function
enables and disables the device. The other function is LED
current dimming with 32 different levels by pulsing the input
signal, as shown on Figure 25. On each consecutive pulse
rising edge, the LED current is decreased by about 3.2%
(1/31 th of the full scale value). After 30 pulses, the LED
current is 3.2% of the full scale current. On the 31 st pulse, the
current drops to zero, and then goes back to full scale on the
following pulse.
Each pulse width should be between 200 ns and 100 m s.
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. By pulsing the EN/DIM signal at
high frequency, the LED current can quickly be set to zero.
The LED driver enters a “zero current” shutdown mode if
EN/DIM is held low for 1.5 ms or more.
The dimming level is set by the number of pulses on the
EN/DIM after the power-up, as shown in Table 7.
T HI
EN/DIM
90
87
84
81
77
74
71
68
65
61
58
55
52
48
45
42
39
35
32
29
26
23
19
16
13
10
6
3
0
100
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
T LED
T LO
T PWRDWN
100%
97% 93%
100%
LED
Current
Shutdown
32 Levels
3%
0%
Shutdown
Figure 25. EN/DIM Digital Dimming Timing Diagram
http://onsemi.com
11
相关PDF资料 |
PDF描述 |
|---|---|
| CAT3648HV3-GT2 | IC LED DRVR WHITE BCKLGT 16-TQFN |
| CAT3661HV3-GT2 | IC LED DRVR WHT BCKLGHT 16TQFN |
| CAT37TDI-T2 | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| CAT4002ASD-GT3 | LED DR 2 CH EZ DIM I/F SC-88 |
| CAT4003BTD-GT3 | IC LED DVR 3CH TSOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| CAT3648HV3-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 |
| CAT3649 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:6-Channel Quad-Mode LED Driver with 32 Dimming Levels & PWM |
| CAT3649AGEVB | 功能描述:电源管理IC开发工具 EVB FOR CAT3649 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| CAT3649HV3-GT2 | 功能描述:LED照明驱动器 6 channel quad mode 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 |
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