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| 型号： | CAT3636HV3-GT2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 6CH 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： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 600kHz ~ 1.4MHz |
| 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 |
CAT3636
Unused LED Channels
For applications with only four or two LEDs, unused LED
banks can be disabled via the enable register internally and
left to float.
For applications with 5 LEDs or less, unused LEDs can
also be disabled by connecting the LED pin directly to
VOUT, as shown on Figure 22. If LED pin voltage is within
1 V of VOUT, then the channel is switched off and a 200 m A
test current is placed in the channel to sense when the
channel moves below VOUT – 1 V.
Figure 22. Five LED Application
Protection Mode
If an LED is disconnected, the output voltage V OUT
automatically limits at about 5.5 V. This is to prevent the
output pin from exceeding its absolute maximum rating.
If the die temperature exceeds +150 ° C the driver will
enter a thermal protection shutdown mode. When the device
LED Selection
LEDs with forward voltages (V F ) ranging from 1.3 V to
5.0 V may be used with the CAT3636. Selecting LEDs with
lower V F is recommended in order to improve the efficiency
by keeping the driver in 1x mode longer as the battery
voltage decreases.
For example, if a white LED with a V F of 3.3 V is selected
over one with V F of 3.5 V, the CAT3636 will stay in 1x mode
for lower supply voltage of 0.2 V. This helps improve the
efficiency and extends battery life.
External Components
The driver requires two external 1 m F ceramic capacitors
for decoupling input, output, and for the charge pump. Both
capacitors type X5R and X7R are recommended for the
LED driver application. In all charge pump modes, the input
current ripple is kept very low by design and an input bypass
capacitor of 1 m F is sufficient.
In 1x mode, the device operates in linear mode and does
not introduce switching noise back onto the supply.
Recommended Layout
In charge pump mode, the driver switches internally at a
high frequency. It is recommended to minimize trace length
to all four capacitors. A ground plane should cover the area
under the driver IC as well as the bypass capacitors. Short
connection to ground on capacitors C IN and C OUT can be
implemented with the use of multiple via. A copper area
matching the TQFN exposed pad (TAB) must be connected
to the ground plane underneath. The use of multiple via
improves the package heat dissipation.
temperature drops by about 20 ° C the device will resume
normal operation.
Figure 23. Recommended Layout
http://onsemi.com
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PDF描述 |
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| CAT3643HV2-T2 | IC LED DRVR WHITE BCKLGT 12-TDFN |
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| CAT3648HV3-GT2 | IC LED DRVR WHITE BCKLGT 16-TQFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT3636HV3T | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636HV3-T2 | 功能描述:LED照明驱动器 6-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 |
| CAT3637 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6-Channel Programmable High Efficiency Quad-Mode⑩ LED Driver |
| CAT3637AEVB | 功能描述:电源管理IC开发工具 EVAL BOARD 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 |
| CAT3637HV3-GT2 | 功能描述:LED照明驱动器 Hi Eff 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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