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| 型号： | CAT4238TD-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.3MHz |
| 电源电压： | 2.8 V ~ 5.5 V |
| 输出电压： | 38V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 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： | CAT4238TD-GT3DKR |
CAT4238
Board Layout
The CAT4238 is a high ? frequency switching regulator.
The traces that carry the high ? frequency switching current
have to be carefully layout on the board in order to minimize
EMI, ripple and noise in general. The thicker lines on
Figure 25 show the switching current path. All these traces
have to be short and wide enough to minimize the parasitic
inductance and resistance. The loop shown on Figure 25
corresponds to the current path when the CAT4238 internal
switch is closed. On Figure 26 is shown the current loop,
Figure 25. Closed ? switch Current Loop
when the CAT4238 switch is open. Both loop areas should
be as small as possible.
Capacitor C 1 has to be placed as close as possible to the
V IN pin and GND. The capacitor C 2 has to be connected
separately to the top LED anode. A ground plane under the
CAT4238 allows for direct connection of the capacitors to
ground. The resistor R 1 must be connected directly to the
GND pin of the CAT4238 and not shared with the switching
current loops and any other components.
Figure 26. Open ? switch Current Loop
Figure 27. Recommended PCB Layout
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4238TD-GT3 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER BOOST TSOT-23-5 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, BOOST, TSOT-23-5 |
| CAT4238TDI-G | 制造商:ON Semiconductor 功能描述:IC 10-LED DRIVER LOW NOISE BOOST |
| CAT4240 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240_0711 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240AEVB | 功能描述:BOARD EVALUATION DPP CAT4240A RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:* 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
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