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tps63020
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  • Forum Post: TPS63020; Dynamic Input Current Limit vs Vin

    Michael Day
    Can you show the TPS63020 change in the maximum average inductor current versus input voltage (Dynamic Input Current Limit)?
    on Apr 13, 2010

  • Forum Post: TPS63020 Dynamic Input Current Limit vs Temperature

    Michael Day
    Can you show the TPS63020 change in the maximum average inductor current versus temperature (Dynamic Input Current Limit)?
    on Apr 13, 2010

  • Forum Post: Re: Tps61086EVM doesn't go to 0V.

    Chris Glaser
    If you are going from a Li-Ion battery to 3.3V and 5V, I recommend the TPS63000 series of devices. With these devices you can discharge your battery more (down below 3.3V) and still maintain a regulated 3.3V. The TPS63020, which was just released this week, will allow the output to go 0V when it is...
    on Apr 16, 2010

  • Forum Post: Re: TPS63020; Dynamic Input Current Limit vs Vin

    Bill Johns
    Average inductor current will be at specified value for input voltages above 2.3V. Below this voltage current limit circuits will decrease. By 1.8V average current will be reduced to 1A. The slope from 2.3V to 1.8V is linear. The above values are approximate values that describe the shape and behavior...
    on Apr 19, 2010

  • Forum Post: TPS63020 operation at low Vin

    Greg Dettro
    We have a customer who wants to design with the TPS63020 with the following requirements: Vin 1.8V to 5.0V Vout 1.2V Iout required: 6mA to 800mA Iout desired “headroom” up to 1.6A (2 times their typical Iout required) With the possible low Vin of 1.8V, SwitcherPro will not...
    on May 25, 2010

  • Forum Post: Re: TPS63020 operation at low Vin

    Bill Johns
    There are two problems with this application. 1.) The TPS63020 has a “Minimum duty cycle in step down conversion” specification of 30% typical and 40% Max. There is the risk that the device will not be able to regulate with 5V in a 1.2V out. Using the 40% max and a Vout of 1.2V input voltage...
    on May 26, 2010

  • Forum Post: Re: TPS63020 Dynamic Input Current Limit vs Temperature

    Bill Johns
    Maximum average inductor current will be at specified value of about 4A when die temperature is below recommend maximum operating temperature of 125C. When the temperature increases beyond that point Dynamic Current Limit will reduce current. When die temperature reaches a 140C (typical value) the device...
    on May 28, 2010

  • Forum Post: Re: TPS63030 application

    Chris Glaser
    The TPS63020 is a brand new buck boost converter. It's main advantage is 4A switches that allow very high output currents. The TPS63000 has 1.8A switches, and can deliver roughly half of the output current that the TPS63020 can. This is the main difference between the devices and the main item that...
    on Jul 1, 2010

  • Wiki Page: TPS63020 Pgood sink current capability question?

    Michael Day
    Q: TPS63020 Pgood sink current capability question? by 1023006 Hello, Could you let me know Pgood sink current capability of TPS63020? I saw datasheet and switch pro, they use 1M ohm for Pgood pull higih resistor to 3.3V output terminal. Is mean the Pgood sink current capability is very low? ...
    on Aug 20, 2010

  • Wiki Page: TPS63000 Buck/Boost Transition

    Michael Day
    Q: TPS63000 Buck/Boost Transition by 1294176 Team, Can you please comment on the buck to boost transition point in terms of input voltage vs. output voltage for the TPS63000? In particular, does this behavior depend upon the load current? A: Re: TPS63000 Buck/Boost Transition by 10449 ...
    on Sep 9, 2010

  • Forum Post: TPS63020 for constant current LED Driving

    Vladimir Demikh
    Hi, We designed a constant current circuit using the TPS63020. Efficiency is our peimary goal. We used an "active feedback" amplifier. We have two questions: 1) Is the attached design ok? Please see drawing. 2) When voltage goes down from 5v to 3v and then back up to 5v the input current...
    on Dec 26, 2010

  • Forum Post: Re: TPS63020 for constant current LED Driving

    Michael Day
    Conceptually, your circuit looks like it should work. I'm not aware of any known reason why the input current to your circuit would be different after the input voltage is lowered from 5V and then raised back to 5V. You will need to compare oscilloscope pictures of the operating waveforms both before...
    on Dec 27, 2010

  • Forum Post: TPS63020 not regulating efficiently at Vout = 5V

    Garth Niethe
    Hi, I'm trying to design a number of TPS63020 circuits and snyc them together. My input voltage range is 3.5 - 5.5 V and my desired outputs are as follows: 3V @ 400mA 4V @ 800mA 5V @ 900mA I can get the 3V and 4V versions working fine but am having trouble with the 5V one. It draws...
    on Jan 5, 2011

  • Wiki Page: TPS63020 split supply operation

    Michael Day
    Q: TPS63020 split supply operation by 282017 Is it possible to put a separate low current supply into VinA and another, wider varying voltage into Vin? The UVLO appears to be on the VinA, so is it possible to run at lower input voltages on the power stage Vin if VinA is still in spec? A resistor is...
    on Jan 24, 2011

  • Forum Post: TPS63020 unstable with no load

    Kevin Lowderman
    I have a TPS63020 design that is unstable with no load. - Is there a minimum load requirement? - PS/SYNC is pulled low. -Vin is 5V - Feedback is 3M (Vout to FB) and 499K (FB to GND). The problem is intermittent but much better when these are changed to a 1M and 200K. Does the TPS63020...
    on Jan 27, 2011

  • Forum Post: Re: TPS63020 unstable with no load

    Chris Glaser
    Yes, the TPS63020 is stable with no load. Can you post a waveform of what is unstable? In power save mode, there will be more output voltage ripple than usual. Since smaller feedback resistors eliminate the problem, they can be confirmed as causing the problem. The datasheet recommends that the lower...
    on Jan 27, 2011

  • Forum Post: Re: TPS63010 - Is the part capable of output current 2A

    Thomas Hoffmann
    Hi Poh Leong, what you are asking is related to physics. When you operate from a voltage below you desired output voltage, than the converter operates in boost mode. Basically the current drive capability is related to the switch current inside the chip. In a simplified way think of it like POUT can...
    on Feb 11, 2011

  • Wiki Page: TPS63xxx - minimum duty cycle in buck mode

    Chris Glaser
    All of the TPS63k devices have a minimum duty cycle in buck mode. This is a result of needing enough time to sample the current for the average current mode control. The minimum duty cycle is 30% typical and 40% maximum, as noted in the TPS63020 datasheet. This shouldn't be an issue in most...
    on Mar 4, 2011

  • Forum Post: TPS63020 inductor selection for high output current

    Daniel Kuo
    Hello, I would like to know how to choose an inductor for the TPS63020 converter. My application will require 4.5V @ 1.5A output, boosting from a li-ion battery (2.7V to 4.2V input). The datasheet for the TPS63020 provides the following equation for determining inducator value (boost mode operation...
    on Mar 20, 2011

  • Forum Post: Re: Large output ripple in TPS63020 LED driver simulation

    Bill Johns
    I have not tried your simulation but there have been several attempts to use the TPS63020 combined with INA193 in an LED driver application. Stability and oscillations have been common and attempts to stabilize the circuit have been mixed. The circuit with a grounded sense resistor has proven more...
    on Apr 4, 2011

  • Forum Post: TPS63020 Maximum Amps @ 5.5 volts

    Ali Baba71275
    Hi! Let's say a V in = 3.7 out of Li-On battery so what would be the maximum achievable I a out @ V out = 5.5 volts, using TPS63020 chip? I need these specs for my dc/dc converter project. Thanks. Mihhail
    on Apr 11, 2011

  • Forum Post: Re: TPS63020 Maximum Amps @ 5.5 volts

    Chris Glaser
    The minimum value for the average input current is 3.5A. Assuming 80% efficiency, which is likely at absolute full power, then this is 3.5*3.7*0.8=10.36W of output power. At 5.5V out, this is about 1.88A. If you just need to boost, then you can look at the TPS61030. It might be more efficient at your...
    on Apr 12, 2011

  • Forum Post: Re: TPS63020 - constant current + PWM control

    Daniel Acevedo
    See this post: http://e2e.ti.com/support/power_management/non-isolated_dcdc/f/196/p/104318/367015.aspx#367015
    on Apr 12, 2011

  • Forum Post: Re: tps63020 Vout deviation in power save mode

    Daniel Acevedo
    The TPS6302x is expected to have a higher output voltage in power save (PFM) mode. This prevents the output voltage from dipping below the set output when a load is applied. In PFM mode, the feedback is between two points near .500V and .525V which is why the average output is measured at .512...
    on Apr 28, 2011

  • Wiki Page: TPS63020 Vout deviation in power save mode

    Daniel Acevedo
    Q: TPS63020 Vout deviation in power save mode by 1433869 Hi: Sorry need you guys help. 1. Could you provide Vout’s deviation in power save mode? 2. Do you have formula about estimating Vout range in power save mode? 3. Why Vout in save mode is a little higher than PWM mode's...
    on May 5, 2011
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