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TPS61200
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  • Forum Post: TPS61200 startup voltage

    Thomas Richter
    Hi all, I've done a TPS61200 based design, the schematic is the one you can see in the datasheet on page 15, the PCB layout is based on the TPS61200 EVB. I'm quite happy with my design except a strange behaviour of the startup voltage. If I ramp up Vin from 0V to 1V the TPS61200 starts at...
    on Jul 27, 2009

  • Forum Post: TPS61200 VAUX Current Capability

    Michael Day
    • Can I use VAUX to power additional circuits in my system? How much current can VAUX supply without affecting the TPS61200 power supply performance. –
    on Apr 5, 2010

  • Forum Post: Re: TPS61200 VAUX Current Capability

    Michael Day
    The TPS61200 VAUX pin can supply up to 1mA of current to power additional external circuitry. The VAUX voltage is an unregulated output between 2.4V and 5.5V. The voltage is internally switched to maintain the higher of the Vaux, Vin, Vout or SW node (L Pin) voltages.
    on Apr 6, 2010

  • Wiki Page: TPS61070 UVLO

    Michael Day
    Q: TPS61070 UVLO by 1166021 I'm using TPS61070 with single cell NiMH battery(0.9-1.2V). TPS61070 has a UVLO at 0.8V. But as the battery reaches o.8V the device shutdiowns but it starts again as the battery voltage rises due to removal of Load from battery. So it oscillates. They want to shutdown...
    on Sep 8, 2010

  • Forum Post: TPS61200 - parallel two converters?

    Harini Ramanujam
    Hi, One of our customers wants to know if they can put two of the TPS61200 devices in parellel together to acheive a higher output current? Can one device avchieve .7amps @ 13.6v?
    on Sep 10, 2010

  • Wiki Page: tps61200 - increased output power

    Chris Glaser
    Q: tps61200 - increased output power by 1184362 Is it possible to increase the output power of the tps61200 using external components? A: Re: tps61200 - increased output power by 1090425 The TPS61200 uses an average current mode control architecture which limits the average current in the sync...
    on Nov 30, 2010

  • Forum Post: Re: TPS61200

    Michael Day
    Can you provide your schematic? It did not appear to be attached. Do you see the problem with a resistive load, or only with your system load? What is your system load, and can you provide a V-I curve for it at startup? Also, it is very helpful to add more description to the subjec line to give...
    on Dec 7, 2010

  • Forum Post: Re: TPS61200 - operating from solar cell

    Michael Day
    The current capability of your solar cell is very low and may not supply the current required to get the TPS61200 up and running. The TPS61200 will definitely work with larger solar cells capabable of delivering more current. You can review the following application note http://focus.ti.com/lit/an/slva345a...
    on Dec 16, 2010

  • Wiki Page: TPS61201EVM-179 resistor size

    Chris Glaser
    Q: TPS61201EVM-179 resistor size by 1621419 1) Does the EVM comes with a 0603 resistor already soldered in place for R4? 2) We state in the bill of material of the EVM user guide that the size of those resistors should be 0603. He is having trouble finding such size in Canada. Can he uses...
    on Feb 18, 2011

  • Forum Post: TPS61200 draws to much current with no load

    Georg Sp��rl
    Hi to all, i built up a test board to try out the TPS61200. When i apply 0.5 V input voltage it draws 60 mA even i have no load connected. The output voltage and the voltage at v aux is ok but what is the reason for that high current ?
    on Mar 18, 2011

  • Wiki Page: TPS61200 Vout prebias above programmed value

    Chris Glaser
    Q: TPS61200 Vout prebias above programmed value by 282017 I have a customer that would like to use the TPS61200 as a backup supply with the input from a supercap. The output will be set to regulate at 3.6V, but another supply could cause 4V to appear on the output of the TPS61200. Will the TPS61200...
    on Jun 17, 2011

  • Forum Post: TPS61200 Using with Indoor Solar Cell (very low power of 50-100µW)

    Den S.
    Hello! I was reading the app. Note of TPS61200 Using with Single Solar Cell, and it says that "The solution provides a reliable start-up of the TPS61200 using solar cells that can deliver at least 3 mA at 0.5 V" But for my application i have a solar cell with max. output Power of 50-100µW...
    on Jun 22, 2011

  • Wiki Page: TPS61200 VAUX Current Capability

    Michael Day
    Q: TPS61200 VAUX Current Capability by 10449 A: Re: TPS61200 VAUX Current Capability by 10449 The TPS61200 VAUX pin can supply up to 1mA of current to power additional external circuitry. The VAUX voltage is an unregulated output between 2.4V and 5.5V. The voltage is internally switched to...
    on Jul 14, 2011

  • Forum Post: tps61200 - Enable with High Signal for only 5ms

    Den S.
    Hallo all, My name is Dennis. I have a question about tps61200: i have a schematic with a supercap as power supply connected ti Vin of tps61200, supercap will be loaded up to 1,6-1,8V , C=100mF low ESR of about 10 Ohms. Would i be able to switch the tps on with a short Logic High Signal of about...
    on Jul 18, 2011

  • Forum Post: Re: PWM Dimming an LED with the TPS63020

    Daniel Acevedo
    Terry, What are your specifications? e.g. what is your input voltage range, how much current do you need for the LED, what is the forward voltage drop of the LED, what is your primary design goal (efficiency, cost, simplicity). One note is that the TPS63020, TPS63010, and TPS63030 have built in...
    on Sep 6, 2011

  • Forum Post: Re: PWM Dimming an LED with the TPS63020

    Terry Cooke
    Any feedback??
    on Sep 13, 2011

  • Forum Post: TPS61200 - Operating two devices in parallel, what is the leakage current for the device that is disabled?

    David Seymour
    I have an application where two TPS61200 devices have their Vout pins connected together. Both devices are set to produce the same output voltage but only one device is enabled at a time (each device has a different power source). Is this type of configuration allowed with the TPS61200? What is the leakage...
    on Sep 17, 2011

  • Forum Post: Data of TPS61221/TPS61097 data sheet graphs for black box/behavioral modeling

    Mustafa Ali
    Hi, I am hoping that TI employees may be able to help me with this request. I am doing behavioral modeling (not SPICE models) of power supply subsystem for photovoltaic energy harvesting powered wireless sensors. As part of the full system model, I want to model the power transfer of characteristics...
    on Sep 27, 2011

  • Forum Post: Re: usage of TPS61220 for charging a battery.

    Chris Glaser
    The TPS61200 is a better fit for this application for three reasons. It has an adjustable UVLO function. This means that you can set the voltage at which the IC turns on. So, you can store a lot of energy in your input cap and get it up to some high voltage, then turn the IC on. It will then convert...
    on Dec 29, 2011

  • Forum Post: TPS61200 in energy-efficient designs

    Max Zhegulin
    Dear community members. We use tps61200 DC/DC switch in battery powered application. With full charged batteries Vin is about 2.5V, Vout is 3.3V. Our application have two operational mode run and sleep. In run mode theoretically current consumption is about 33mA. In sleep mode less 1mA (msp430 sleep...
    on Mar 12, 2012

  • Forum Post: Re: TPS61200 in energy-efficient designs

    Chris Glaser
    I am having trouble reading your post since the sentences didn't wrap around. If you are copying and pasting from microsoft word, please use the 'paste from word' button when you post. Please also attach a schematic. The lines/traces on your layout look very small/thin. For a switching...
    on Mar 12, 2012

  • Forum Post: Re: Cant explain current drop in TPS61220

    Michael Day
    It is important for you to remeasure your voltages and currents. I do not understand how you can have 3.5V across a 100 ohm resistor and only get 300mA through it. The equation V=IR must be valid. Also be aware that if you have a 3.5V @ 300ma source which is 1.05V and get a 5V @ 200mA = 1.00W, it requires...
    on Mar 27, 2012

  • Forum Post: Re: TPS61027 fixed 5V Boost Will Only Output 4.6V

    Chris Glaser
    Each TPS61027 device is tested to ensure that it outputs 5V when used. So, I have a high confidence that this is an application issue with your configuration. Be glad that you tested this circuit before going to production. Other customers are not that prudent. Yes, the device does require some ESR...
    on Mar 29, 2012

  • Forum Post: RE: TPS61097 pin compatible higher Iout Version?

    Chris Glaser
    400 usec is quite a long time, so we'll need to consider that as steady state for the power supply providing it. So, what you need is a device that can supply 150 mA at 3.3V from a 0.9V source. The TPS61070 is the next highest current level IC but cannot give that much output current at that very...
    on Jun 6, 2012

  • Forum Post: RE: TPS61200 IC burning out frequently.

    Chris Glaser
    Most failures of these ICs are layout related. Be sure that you followed the layout guidelines in the datasheet. You can order the EVM for a known good layout to test on. Also, note that R1 and R6 set an output voltage of around 3.2V. This might be below your input voltage. If you need a buck-boost...
    on Jul 6, 2012
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