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| 型号： | L6997STR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO20 |
| 封装： | MO-153-AC, TSSOP-20 |
| 文件页数： | 14/30页 |
| 文件大小： | 546K |
| 代理商： | L6997STR |
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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 CIN, 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| L6999 | 制造商:HAMAMATSU 制造商全称:Hamamatsu Corporation 功能描述:The best light source is supported by the best electrode technology |
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