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參數(shù)資料
| 型號(hào)： | L6997S |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS |
| 中文描述： | 降壓控制器低電壓運(yùn)作 |
| 文件頁數(shù)： | 21/30頁 |
| 文件大小： | 515K |
| 代理商： | L6997S |
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L6997S
7.2 DEMO BOARD LAYOUT
Real dimensions: 5.7cm x 7.7cm (2.28inch x 3. 08inch)
Figure 18. PCB layout: bottom side
Figure 19. PCB Layout: Top side
Figure 20. Internal ground plane
Figure 21. Power & signal plane
Table 12. PCB Layout guidelines
Goal
Suggestion
To minimize radiation and magnetic
coupling with the adjacent circuitry.
1) Minimize switching current loop areas. (For example placing C
IN
, High Side
and Low side MOSFETS, Shottky diode as close as possible).
2) Place controller placed as close as possible to the power MOSFETs.
3) Group the gate drive components (Boot cap and diode) near the IC.
To maximize the efficiency.
Keep power traces and load connections short and wide.
To ensure high accuracy in the
current sense system.
Make Kelvin connection for Phase pin and PGND pin and keep them as close
as possible to the Low Side MOSFETS.
To reduce the noise effect on the IC.
1) Put the feedback component (like output divider, integrator network, etc) as
close as possible to the IC.
2) Keep the feedback traces parallel and as close as possible. Moreover they
must be routed as far as possible from the switching current loops.
3) Make the controller ground connection like the figure 8.
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| L702N | 2A QUAD DARLINGTON SWITCH |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6997STR | 功能描述:DC/DC 開關(guān)控制器 3.0 to 5.5V Step-Dwn RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6998-0 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-1 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-5 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-6 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
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