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I started with the design from sparkfun: [https://www.sparkfun.com/products/9716 FTDI Basic Breakout] which I really liked, thanks for making the design open source, it saved me time.
 
I started with the design from sparkfun: [https://www.sparkfun.com/products/9716 FTDI Basic Breakout] which I really liked, thanks for making the design open source, it saved me time.
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== PINOUT ==
 +
<pre>
 +
+----------------------------+
 +
|  FTDI Board        -> DTR |
 +
|                    <- RX  |
 +
| U                  -> TX  |
 +
| S                      VCC |
 +
| B                  <- CTS |
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|                        GND |
 +
+----------------------------+
 +
</pre>
  
 
== Features ==
 
== Features ==
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* Instead of PTC-Fuse: Current Limiting Power Switch 500mA (MIC2005A-1YM5 or similar)
 
* Instead of PTC-Fuse: Current Limiting Power Switch 500mA (MIC2005A-1YM5 or similar)
 
* USB Bus Powered with Power Switching Configuration (see page 25 of the FT232R datasheet)
 
* USB Bus Powered with Power Switching Configuration (see page 25 of the FT232R datasheet)
 +
  
 
The optional features of this FTDI with the Adum5402 are:
 
The optional features of this FTDI with the Adum5402 are:
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== Stacking FTDI adapter with DC/DC converter ==
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== Stacking FTDI adapter with DC/DC converter (500mA) ==
 
Traco Power:
 
Traco Power:
  
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Licensing CC v3.0 Share-Alike (http://creativecommons.org/licenses/by-sa/3.0/)
 
Licensing CC v3.0 Share-Alike (http://creativecommons.org/licenses/by-sa/3.0/)
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 +
[[Kategorie:Projekte]]

Aktuelle Version vom 26. März 2015, 13:02 Uhr

Isolated versatile FTDI

by: DCEM

Background

At some point I needed an isolated FTDI. Since I could not find one to buy, I designed one. After talking to some people in the hackerspace with different ideas about the project I designed it so that lots of options are possible with the design.

You can choose between the ADuM 1402 and the ADuM 5402. The 1402 will need some power on the isolated side while the 5402 can deliver up to 60mA via an internal isolated DC/DC converter.

I started with the design from sparkfun: FTDI Basic Breakout which I really liked, thanks for making the design open source, it saved me time.

PINOUT

+----------------------------+
|  FTDI Board         -> DTR |
|                     <- RX  |
| U                   -> TX  |
| S                      VCC |
| B                   <- CTS |
|                        GND |
+----------------------------+

Features

The features of this FTDI are:

  • galvanic isolation via ADuM 1402 or ADuM 5402 (that’s what all the fuzz is about :) )
  • small (15.1*0.61/38,4*15,5)
  • Micro-USB-B connector (these are the cables I carry around anyways)
  • 5V,5V switched, GND and FTDI connections in a 0.1 grid, so you can stack it onto a Universal PCB (stack a bigger DC/DC Converter for full 500mA for example)


The optional features of this FTDI are:

  • RX/TX LED for serial traffic indication (I always use low current LEDs to save power)
  • Shield connection via RC element
  • ESD Protection (USB) via SRV05 or Würth 82400102
  • PTC-Fuse 500mA (USB)
  • Instead of PTC-Fuse: Current Limiting Power Switch 500mA (MIC2005A-1YM5 or similar)
  • USB Bus Powered with Power Switching Configuration (see page 25 of the FT232R datasheet)


The optional features of this FTDI with the Adum5402 are:

  • Switch for output voltage selection (3.3V / 5V)
  • LEDs for voltage selection feedback (same colours as the cables in your ATX power supply ;) )
  • Current Limiting Power Switch 50mA to protect the ADuM5402 (MIC2090-1YM5 or similar)

Design Files

Circuit: Datei:Isolated versatile FTDI.pdf

Eagle files: Datei:Isolated versatile FTDI.zip

Finished PCBs

  • Soldered PCBs

  • FTDI adapter in action

  • Back side FTDI adapter

  • Front FTDI adapter extended version

  • Front FTDI adapter simple version

  • Stacking FTDI adapter with DC/DC converter


Stacking FTDI adapter with DC/DC converter (500mA)

Traco Power:

TMR 3-0511 5V

TMR 3-0510 3V3


Isolated FTDI DC-DC-Stack-Plan.png

Isolated FTDI DC-DC-Stack-Board 1.jpg Isolated FTDI DC-DC-Stack-Board 2.jpg

Isolated FTDI DC-DC-Board 1.jpg Isolated FTDI DC-DC-Board 2.jpg

Isolated FTDI DC-DC-Stack-without.jpg Isolated FTDI 5.jpg

PCBs

First PCBs are ordered and we will solder them in a few weeks. Progress:

Progress isolated versatile FTDI TOP 1.jpg Progress isolated versatile FTDI TOP 2.jpg Progress isolated versatile FTDI TOP 3.jpg Progress isolated versatile FTDI TOP 4.jpg Progress isolated versatile FTDI TOP 5.jpg

Progress isolated versatile FTDI BOTTOM 1.jpg Progress isolated versatile FTDI BOTTOM 2.jpg Progress isolated versatile FTDI BOTTOM 3.jpg Progress isolated versatile FTDI BOTTOM 4.jpg Progress isolated versatile FTDI BOTTOM 5.jpg


Bill of Materials / Jumper Configuration

basic

  • solder SJ_VE1
Quantity Part Name Value/Part No Size
1 PCB
1 USB Connector MICRO B ZX62-B-5PA(11)
1 .1 inch Header 6P
1 ADuM1402
1 U1 FT232RL
4 C2, C3, C4, C6 100nF 0402
1 C9 10µF 1206

RX/TX LED for serial traffic indication

Quantity Part Name Value/Part No Size
1 LED_TX LED red (2mA) 0603
1 LED_RX LED green (2mA) 0603
2 R1, R2 2K2 0603

Shield connection via RC element

Quantity Part Name Value/Part No Size
1 R3 330R 0805
1 C7 220nF X7R 0805

ESD Protection (USB)

Quantity Part Name Value/Part No Size
1 SRV05

PTC-Fuse 500mA (USB)

  • cut SJ_VBUS
Quantity Part Name Value/Part No Size
1 PTC_FUSE PTC-Fuse 500mA 1812

Current Limiting Power 500mA (instead of PTC-Fuse)

  • cut SJ_VBUS
Quantity Part Name Value/Part No Size
1 MIC2005A-1YM5
1 C5 1µF 0603
1 C9 100µF 1206

Power Switching Configuration

  • cut SJ_5V_SW
Quantity Part Name Value/Part No Size
1 Q1 IRLML2244TRPBB
1 R6 10K 0603
1 R7 1K 0603
2 C1, C8 100nF 0402

ADuM5402

Quantity Part Name Value/Part No Size
1 ADuM5402
2 C10, C11 10µF 0603

Switch for output voltage selection (3V3/5V)

  • cut SJ_V+_5V
Quantity Part Name Value/Part No Size
1 S1 SSK-1202

LEDs for voltage selection feedback

Quantity Part Name Value/Part No Size
1 LED_3V3 LED orange (2mA) 0603
1 LED_5V LED red (2mA) 0603
1 R4 2K2 0603
1 R5 1K 0603

Current Limiting Power Switch 50mA to protect the ADuM5402

  • cut SJ_V+
Quantity Part Name Value/Part No Size
1 MIC2090-1YM5
1 C12 10µF 0603

License

Licensing CC v3.0 Share-Alike (http://creativecommons.org/licenses/by-sa/3.0/)

Von „https://hackerspace-ffm.de/wiki/index.php?title=Isolated_versatile_FTDI&oldid=7511“