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参数资料
| 型号： | CAT4201AEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION DPP CAT4201A |
| 设计资源： | CAT4201AEVB Schematic CAT4201AEVB Gerber Files CAT4201AEVB Bill of Materials |
| 标准包装： | 1 |
| 系列： | * |
CAT4201
VIN R5
1 W
C1
4.7 μ F
U1
VBAT
D1
C4
10 μ F
R1
8.3 k Ω
CAT4201
RSET
CTRL SW
GND
L1
22 μ H
1A
R4
1 k Ω
C2
4.7 μ F
U2
VBAT
CAT4201
D2
Figure 31. Open LED Mode
R2
8.3 k Ω
RSET
CTRL SW
GND
L2
22 μ H
Board Layout
In order to minimize EMI and switching noise, the
Schottky diode, the inductor and the output capacitor C2
should all be located close to the driver IC. The input
capacitor C1 should be located close to the VBAT pin and the
Schottky diode cathode. The CAT4201 ground pin should be
C3
4.7 μ F
R3
8.3 k Ω
U3
VBAT
CAT4201
RSET
CTRL SW
GND
D3
L3
22 μ H
connected directly to the ground plane on the PCB. A
recommended PCB layout with component location is
shown on Figure 32. The LEDs are connected by two wires
tied to both sides of the output capacitor C2. The LEDs can
be located away from the driver if needed.
Figure 30. Three CAT4201 in Parallel for 1 A LED
Open LED Behavior
If the LEDs are not connected, the CAT4201 stops
switching and draws very little current.
At power ? up with no load connected, the capacitor C2 is
charged ? up by the CAT4201. As soon as the bottom side of
the capacitor (C2 ? ) reaches 0 volt, as shown on Figure 31,
the CAT4201 stops switching and remains in the idle mode
only drawing about 0.4 mA current from the supply.
Figure 32. Recommended PCB Layout
In order to further reduce the ripple on the supply rail, an
optional Pi style filter (C ? L ? C) can be used. A 10 m H
inductor rated to the maximum supply current can be used.
http://onsemi.com
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4201AGEVB | 功能描述:LED 照明开发工具 EVAL BOARD FOR LED DRIVER RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| CAT4201TD | 制造商:ON Semiconductor 功能描述:IC LED DRIVER HI EFFICIENCY |
| CAT4201TD-GT3 | 功能描述:LED照明驱动器 350mA Hi-Efficiency Step-Down 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 |
| CAT4201TD-GT3 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER BUCK TSOT-23-5 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, BUCK, TSOT-23-5 |
| CAT4237 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver |
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