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參數(shù)資料
| 型號： | SRM4010 |
| 英文描述： | DC:DC Converter |
| 中文描述： | 直流：DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 224K |
| 代理商： | SRM4010 |
Microsemi
Colorado Division
800 Hoyt Street, Broomfield, CO. 80020, 303-469-2161, Fax: 303-466-3775
Page 11
Copyright 2000
2003-02-05 Rev. IR
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SRM4010
40A Synchronous Rectifier Module
COLOR ADO DIVISION
Layout Guidelines
The SRM4010 is designed to simplify the PCB layout. The
SGND is common to the PGND inside the device. SGND should
be kept separate from the PGND unless the PGND
can be made large in area to have small inductance. The SGND is
the intended reference for the external tailoring parts. The
baseplate can be made common with the PGND plane and used to
spread heat. One technique that works well is to have the PGND
plane on the layer immediately under the SRM4010 and flood the
plane around the leads 4, 5, 7, 8 and 9. The plane would connect
to pins 3 and 6. Surface mount parts can then used for the added
parts on 7, 8 and 9.
Care must be given to the resistance of traces on the output
interconnects. It is easy to have trace losses that are equal to or
higher than the conduction losses in the module. If high
efficiency is desired, close attention needs to be paid to this. The
conductors often need to be duplicated on multiple layers.
Demo Board
A dedicated fully operational board is available to demonstrate the
operation of the SRM 4010. The board contains a standard
commercially available PWM controller. The board is designed to
operate at 48v input and 3.3v output levels. The inductor is a pair of
surface mount transformers a 9:2 turns ratio which gives a 10v
secondary voltage swing from a 48v input. These inductors are
suitable for low volume sampling and development. Volume
production using optimized planar inductors with the SRM4010 will
have a typical converter efficiency 1% - 2% higher than the
demonstration board’s efficiency.
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