RT5047 Просмотр технического описания (PDF) - Richtek Technology
Номер в каталоге
Компоненты Описание
Список матч
RT5047 Datasheet PDF : 16 Pages
| |||
RT5047
Layout Consideration
For high frequency switching power supplies, the PCB layout is important to get good regulation, high efficiency and
stability. The following descriptions are the guidelines for better PCB layout.
For good regulation, place the power components as close as possible. The traces should be wide and short
enough especially for the high-current loop.
Minimize the size of the LX node and keep it wide and shorter.
The exposed pad of the chip should be connected to a strong ground plane for maximum thermal consideration.
D3 and D4 should be placed
as closed as possible to
VOUT for surge protection.
The CIN, CBST and CLNB
should be placed as closed
as possible to R T 5 0 4 7 f o r
good filter.
The exposed pad of the chip
should be connected to
analog ground plane for
thermal consideration.
V D4
OUT
CLNB1
D2
D3
CBST1 CBST2 CBST3 D1
L1
VIN
CIN1 CIN2
LNB
TONE
BOOST
NC
GND
LX
SEL
VIN
EN
The TONE, SEL and EN pin
should be connected to MCU
or GND. Do not floating these
pins.
The inductor should be placed as close as possible to the L X pin to minimize the
noise coupling into other circuits.
LX node copper area should be minimized for reducing EMI
Place the power components as close as possible. The traces should be wide and
short especially for the high-current loop.
Figure 4. PCB Layout Guide
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
DS5047-00 March 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
15
Share Link: 