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参数资料
| 型号： | CAT4240TD-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： | CAT4240TD-GT3DKR |
CAT4240
Board Layout
The CAT4240 is a high ? frequency switching regulator.
The traces that carry the high ? frequency switching current
have to be carefully laid out on the board in order to
minimize EMI, ripple and noise in general. The thicker lines
on Figure 26 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 26 corresponds to the current path when the
CAT4240 internal switch is closed. On Figure 27 is shown
the current loop, when the CAT4240 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
CAT4240 allows for direct connection of the capacitors to
ground. The resistor R 1 must be connected directly to the
GND pin of the CAT4240 and not shared with the switching
current loops and any other components.
V IN
L
D
V OUT
V IN
L
D
V OUT
VIN
SW
VIN
SW
CAT4240 Switch
SHDN
Closed
FB
SHDN
CAT4240
Switch
Open
FB
C 1
GND
C 2
R1
C 1
GND
C 2
R1
Figure 26. Closed ? switch Current Loop
Figure 27. Open ? switch Current Loop
Figure 28. Recommended PCB Layout
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4240TD-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 |
| CAT-42506 | 制造商:Thomas & Betts 功能描述:1/4' YELLOW 6 PCS. PER BAG |
| CAT4254VP2-GT3 | 制造商:Catalyst Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述: |
| CAT431L | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:Low-Voltage Adjustable Precision Voltage Reference |
| CAT431LEUK-TE7 | 功能描述:基准电压& 基准电流 1.24V .5% RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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