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Up to Discussions in Microchip nanoWatt XLP (eXtreme Low Power)
1 2 Previous Next 9040 Views 17 Replies Latest reply: Apr 11, 2011 12:44 PM by LDuMont RSS
nlarson PremierFarnell
nlarson
17
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Nov 13, 2009 2:40 PM

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Rishi Vasuki

Rishi has been with Microchip Technology since 2001.  He has experience in developing portable music players and designing a wide variety of embedded applications (audio, security, motor control, power supplies and smart sensor).  His current focus includes PIC(R) XLP MCUs for eXtreme Low Power applications as well as Microchip's mTouch solutions using 8-bit PIC18 & 16-bit PIC24 MCUs.

 

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Tags: embedded, microchip, motor_control, power_supplies, security, low_power, extreme_low_power, portable_music_player, suny, xlp_mcus, smart_sensor, rishi_vasuki, audio_expert
  • edmund PremierFarnell
    edmund
    Currently Being Moderated
    1. Nov 16, 2009 8:47 AM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi,

     

    just wondering have you come acros this article  http://www.techonline.com/learning/techpaper/220301083 ?

     

    Is mentioned that Microchip nano XLP might not be having the lowest sleep current in some situation. Do give me your thoughts.

     

    But of cos correct me if I am wrong.

     

    Cheers

    Edmund

  • edmund PremierFarnell
    edmund
    Currently Being Moderated
    2. Nov 30, 2009 9:50 PM (in response to edmund)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi,

     

    any opinions from anyone ?

     

    Cheers

    Edmund

  • yehuda.ortal@gmail.com Level 1
    yehuda.ortal@gmail.com
    Currently Being Moderated
    3. Jan 3, 2010 3:37 AM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!
    Dear Sir,
    I would like to ask if there is available p.s.
    The Power supply spec:
    1. Input voltage: universal input or two ranges of input.
    2. Output constant current: 400mAmp.
    3. Output Voltage: 48vDC
    4. Ultra high efficiency around 95% @ full load - most important.
    5. Max mechanical Dimensions: [L x W x H] : 28cm x 1.2cm x 0.8cm
      resistance Load .
    It is preffered to implement by Microcontroler like Microchip in order to use PWM at the output and remote PWM adjusting.
    The microchip suppose to set 0 - 100% by PWM

    Thank you and Best Regards
    Yehuda Ortal
  • mmcglade e14 Expert
    mmcglade
    Currently Being Moderated
    4. Jan 5, 2010 8:16 AM (in response to yehuda.ortal@gmail.com)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Unfortunately Microchip do not manufacture these sort of devices , yes we could offer a small MCU and our MCP1630 to provide a regulated output but we have no solution to dropping from main voltage . Hope this helps ?

    Mike

  • michaelkellett Level 7
    michaelkellett
    Currently Being Moderated
    5. Jan 5, 2010 10:31 AM (in response to yehuda.ortal@gmail.com)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    You are going to struggle with this:

     

    Your spec requires a mains input 19.2W, 48V output supply with 95% efficiency and in a volume of 26.88cc with a very unfortunate shape.

     

    Farnell have an XP Power part giving 25W a 85% efficiency (Part number 1580485) but the volume is 84cc. They have an open frame version (1580478) where you can see all the parts.

     

    To meet your spec you will need to improve efficiency and get down to about 1/3 of the volume of a commercially availble part - it may be possible but it won't be cheap !!!

     

    May I suggest you go back one step and tell us what you are trying to do - perhaps a bit of lateral thinking may help solve your problem.

  • ucl-anatomy Level 1
    ucl-anatomy
    Currently Being Moderated
    6. Apr 30, 2010 2:52 AM (in response to nlarson)
    Problem with WD My passport Essential 320GB

    Hi,

     

    Not sure whoom to ask.

     

    We ordered one of My Passport Essential Ultra-portable hard drives (320GB) for one of our Mac computers. However this hard drive was not working and after scientist complained we tried to run test this on PC. However our PC cannot recognize the hardware and sometimes won’t even react when we plug in the Hard drive. I’m testing it now. The light appears to switch on and there is movements in the case but no pop up window or any message that HD was connected to computer. I was looking for driver on the internet but I can not find any. I was thinking if this might be error in firmware. Is there any link I could try to update it?

     

    Many thanks,
    Michal

  • mberman e14 Expert
    mberman
    Currently Being Moderated
    7. Apr 30, 2010 11:02 AM (in response to ucl-anatomy)
    Re: Problem with WD My passport Essential 320GB

    Hi,

    I believe this WD external drive is not Mac compatible.  You may need their newest version that is.

    Here is the website for details: http://www.wdc.com/en/

    Regards, Mel

  • nurul Level 1
    nurul
    Currently Being Moderated
    8. May 5, 2010 9:13 PM (in response to nlarson)
    USB OTG controller
    Hello, I would like to ask about USB OTG Full Speed Host and High Speed Peripheral Controller Evaluation Board. As all know, the function of USB OTG is to convert the client function to be host function. Let say I am about to use the evaluation board of the USB OTG which is EV-OXU210 Evaluation Board, can it directly convert the function of client to host as I plug the PDA through this evaluation board? Thank you.
    Attachments:
  • enrico.migchels Level 4
    enrico.migchels
    Currently Being Moderated
    9. May 10, 2010 1:24 AM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi,

     

    I am considering a DSPic for a grid tied inverter. The inverter has a 400VDC input (input source solar DC/DC converter). Is the DSPic ever used for such an application? I know it has been used for AC induction motor control and AC/DC power supplies. My application will be a mix of both application. Grid Inverters have similar control loops (park - clark vector transformations) as motors and same circuits (full bridge) as power supplies. If anyone has information on the use of DSPic for these devices please share.

     

    Best regards,

     

    Enrico Migchels

  • MicrochipRTCfr Level 5
    MicrochipRTCfr
    Currently Being Moderated
    10. May 10, 2010 3:59 PM (in response to enrico.migchels)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi Enrico,

     

    There are 2 keys application targets in dsPIC30/33 families :

     

    * MOTOR control (references with "MC" at the end like DSPIC33FJ256MC710A-I/PF. : http://www.microchip.com/dscMOTOR

     

    * SMPS & energy conversion (references with "GS" at the end like  dsPIC33FJ64GS610 http://www.microchip.com/SMPS  . On this previous link you should find the information you're looking for.

     

    There are several applications notes showing implementation of Parke & Clarke transformation (Vector control).

    I recommend the use of dsPIC33 family which is more powerful (40MIPS) than dsPIC30 and especially some devices have on-chip DMA which reduces CPU load as peripheral read / write dual PORT RAM without CPU assistance.

     

    You may also want to ask precise questions on Microchip dsPIC dedicated forums : http://www.microchip.com/forums/tt.aspx?forumid=178

     

    regards

  • Jorge_Garcia Level 4
    Jorge_Garcia
    Currently Being Moderated
    11. May 19, 2010 4:42 PM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi Rishi,

     

    I wanted to know if you had any experience using MPLAB and the Pickit family of low cost programmers under Linux? Does Microchip have any plans to port MPLAB to Linux and Mac?

     

    I was considering going from Windows to Linux permanently and I just wanted to make sure I could still run MPLAB to program my Dspics. I'm currently running the latest version of Ubuntu 10.04 Lucid Lynx.

     

    Thanks for your time.

     

    Regards,

    Jorge Garcia

  • bruce53 Level 1
    bruce53
    Currently Being Moderated
    12. Aug 9, 2010 12:10 PM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi Rishi....

     

    I have a fishing boat that I can steer electronically:  if A is logic high, the boat turns slowly to port; if B is high, it turns to starboard; if both are the same (high or low) the pilot motor stops.  But I want to rig it as fully hands-off.  I am looking at an angular rate sensor gyroscope.  Isn't there some way that I can use it to provide the logic to hold the boat on a steady heading?  I have all the servo parts working fine.  Many thanks for your help, or, if I have attacked the wrong expert, can you shift this problem to another one....

    Bruce

  • sarra Level 1
    sarra
    Currently Being Moderated
    13. Jan 13, 2011 9:56 PM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Dear Rishi,

    Im final year student and doing a project for button detection.

    I want to program PIC18F452 using mlab version 8.3.3 and CSS C- compiler.

    Actually Im beginner.

    What should I do?

    Could you teach me and give me a basic example to make sure that I already used the right software and compiler.Im really blurr about that.

    Thank you for your help.

  • bruce53 Level 1
    bruce53
    Currently Being Moderated
    14. Jan 14, 2011 12:47 PM (in response to nlarson)
    Re: Have a question? Ask our Microchip nanoWatt XLP expert!

    Hi Saara....

    I have Sure Electronics dual-axis magnetic sensor module with UART and I²C interface.  Can you recommend a µcontroller or processor to use with it to develop a magnetic compass project?

    Many thanks...

    Bruce Matthews

    831 484-9006

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