Forum»Forum › PCB Design › Power conversion module 220V to 18V

2075 views|1 replies

32 Posts	0 Resources

The OP

Published on 2020-8-29 12:03 Only look at the author

Power conversion module 220V to 18V [Copy link]

Using a 220V to 18V transformer, the voltage output of the transformer output (pins 12, 14, 17, 19) is 12V. After passing through the MB6S rectifier, the output voltage of pin 3 of SP1 is 27V, and the output voltage of pin 4 of SP2 is -27V. Then it passes through LM7818 and MC7918, but the output voltage of 7818 and 7918 is not +18V and -18V, but +27V and -27V. Why don't the voltage regulator tubes (7818, 7918) work?

This post is from PCB Design

Latest reply

maychang

Replied in another post. Don't post so many identical posts repeatedly. Details Published on 2020-8-29 16:34

PCB设计论坛 PCB设计 PCB Layout

maychang

2w Posts	0 Resources

Published on 2020-8-29 16:34 Only look at the author

Replied in another post.

Don't post so many identical posts repeatedly.

This post is from PCB Design

Protel DXP Powerpcb

Return list

Guess Your Favourite

Just looking around

I want to ask if the TM4C123GXL core board needs to be powered by a 220v to 5v power module instead of USB. Which pin should my 5V be connected to?
[i=s]ThispostwaslasteditedbyWangManmanon2024-7-2015:43[/i]IwanttoaskiftheTM4C123GXLcoreboardneedstobepoweredbya220vto5vpowermoduleinsteadofUSB
220V AC to 18V DC
Usinga220Vto18Vtransformer,thevoltageoutputofthetransformeroutput(pins12,14,17,19)is12VThenitpassesthroughLM7818andMC7918,buttheoutputvoltageof7818and7918isnot+18Vand-18V,but+27Vand-27V
OPEN SCOFIELD WINTER WARDROBE
[img]https://wwwnet/images/2024/11/14/1f9dff95d3bc981f8img][img]https://wwwnet/images/2024/11/14/2a81ca07f0c52991bimg]
Newbie Report Newbie Report
How to use CAN communication to control the inverter?
A question about Datasheet?
The E-coin exchange page has been completely revamped, with more surprises waiting for you to discover!
The difference between various chips in TI's CC series: CC2430 CC1100
happy holidays
【Tuya BK7231N】Unboxing Experience

Find a datasheet?

EEWorld Datasheet Technical Support

Hot tag

Related articles more>>

Qualcomm launches its first RISC-V architecture programmable connectivity module QCC74xM, supporting Wi-Fi 6 and other protocols
On November 14, Qualcomm announced the launch of two connectivity modules, QCC74xM and QCC730M, f
It is reported that memory manufacturers are considering using flux-free bonding for HBM4 to further reduce the gap between layers
On November 14, according to Korean media ETNews, Samsung Electronics, SK Hynix, and Micron are a
ON Semiconductor CEO Appears at Munich Electronica Show and Launches Treo Platform
During Electronica, ON Semiconductor CEO Hassane El-Khoury was interviewed by Power Electronics N
AMD launches second-generation Versal Premium series: FPGA industry's first to support CXL 3.1 and PCIe Gen 6
SEMI: Global silicon wafer shipment area increased by 6.8% year-on-year and 5.9% month-on-month in 2024Q3
TSMC's 5nm and 3nm supply reaches "100% utilization" showing its dominance in the market
LG Display successfully develops world's first stretchable display that can be expanded by 50%
Seizing the Opportunities in the Chinese Application Market: NI's Challenges and Answers
New diaphragm-free solid-state lithium battery technology is launched: the distance between the positive and negative electrodes is less than 0.000001 meters
Photoresist giant JSR Korea EUV MOR photoresist production base started construction, expected to be put into production in 2026

New Posts

Featured

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews

User Search：

Room 1530, Zhongguancun MOOC Times Building, Block B, 18 Zhongguancun Street, Haidian District, Beijing 100190, China Tel:(010)82350740 Postcode：100190

京公网安备 11010802033920号

快速回复返回顶部 Return list