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Non-Isolated DC/DC

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  • Wiki Page: TPS63030 Internal Resistance of Vin to VINA

    Chris Glaser
    Original Question: Hello, I have a customer asking for the value of the internal resistance between the VinA and Vin pins of the TPS63031 as shown on page 5 of the data sheet (SLVS696B). Verified Answer: It is about 100 Ohm, just like the other devices in the TPS63xxx family.
    on Mar 4, 2013

  • Wiki Page: TPS63020 Buck-Boost Operation

    Daniel Acevedo
    Q: Could you please briefly tell me which MOSFETs are on/off and which MOSFETs are switching when in each mode? A: In Buck Mode, Q3 is on always and Q4 is off always and Q1 and Q2 are switching. In Boost mode, Q1 is on always and Q2 is off always and Q3 and Q4 are switching. When VIN is near...
    on May 16, 2012

  • Wiki Page: TPS63030 - Pre-bias greater than set output voltage

    Daniel Acevedo
    Q: TPS63030 - pre bias greater than set output voltage by 1825225 What happens if the TPS63030 is enabled when there is an existing pre bias at the output? i.e. my Vout is set to 3.3 V, but prior to turning on the part, there is already a 3.8V pre bias at the output. A: Re: TPS63030 - pre...
    on Apr 12, 2012

  • Wiki Page: TPS63020: VINA not connected to VIN, any issues?

    Daniel Acevedo
    Q: TPS63020: VINA not connected to VIN, any issues? by 16027 We have a board that has a TPS63020. Its VINA and PSSYNC pins were tied together, but not tied to VIN. The data sheet recommends: " To make sure that the internal control circuits are supplied with a stable low noise supply voltage...
    on Oct 28, 2011

  • Wiki Page: TPS63030 about OVP

    Michael Day
    Q: TPS63030 about OVP by 1589050 1. Does TPS63030 have built in OVP? 2. When feedback loop open, what is the MAX value of output voltage ? If TPS63030 have built in OVP, I think that MAX value of output voltage decide value of OVP built. A: Re: TPS63030 about OVP by 244698 1. Does TPS63030...
    on Aug 30, 2011

  • Wiki Page: TPS63030 power consumption when enable=low

    Clancy Soehren
    Q: TPS63030 higher power consumption than expected by 1754684 a customer is using TPS63030 in his application... he observed higher power consumption for the TPS than expected when EN = LOW (shutdown)... below the details: << We use the TPS63030DSK to generate +5V. To save power in...
    on Aug 22, 2011

  • Wiki Page: TPS63030 FB pin resistor values

    Chris Glaser
    Q: TPS63030 FB pin resistor values by 1038028 Hi Customer sees note in d/s page 14 - " it is recommended to keep the value of this resistor (R2) in the range of 200k" Customer has used lower values for R1 and R2. E.g. he has used 1k for R2 and 4k for R1. Vout=2V5 in this case. He asks...
    on Jun 24, 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

  • 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

  • Wiki Page: TPS63030 Startup Enable Time Delay

    Michael Day
    Q: TPS63030 Startup Enable Time Delay by 12948 A: Re: RE: TPS63030 Startup Enable Time Delay by 1169162 The startup behavior shown in the scope plot is expected. The TPS63030 shows a delay between EN pin goes high and startup of the converter at - first startup - every startup when...
    on Oct 18, 2010

  • Wiki Page: TPS63030 output ripple for PWM MODE

    Anthony Fagnani
    Q: On the std 63030 EVM (HPA417) why is there output ripple, shown in the picture, under the following conditions: Vin = 4.5V Vout = 3.3V. Iout = 100mA. Power save mode is OFF When input voltage is less than 4.4V or greater than 4.6 V the ripple is gone. A: The ripple will only occur at the...
    on Oct 6, 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

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