Non-Isolated DC/DC

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Non-Isolated DC/DC

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  • Wiki Page: TPS62240/60 MODE pin

    Chris Glaser
    Original Question: TPS62240 MODE pin The TPS62240 comes in both a TSOP and SON package. In the TSOP package the MODE pin is not provided. It is not clear from the datasheet what the default behavior is. With the MODE pin low = power save mode for automatic switching. Is power save mode enabled with...
    on Apr 5, 2013

  • Wiki Page: TPS62261/2/3 Feedforward Capacitor

    Chris Glaser
    Original Question: TPS62261/2/3 Feedforward Capacitor Hi All, Does the TPS62261 /2/3 integrate the feedforward capacitor that is recommended in the datasheet? What is the recommended placement of the zero created by the feedforward capacitor? Thanks, Verified Answer: RE: TPS62261/2/3 Feedforward...
    on Aug 24, 2012

  • Wiki Page: TPS62240/260/290/560/590 Enable pin control

    Chris Glaser
    Customer wishing to sequence the turn-on of TPS62590 , pulls up the Enable pin to Vin=3V3 using 10k and adds a 1uF capacitor to gnd to provide an RC delay. Vout=1V5 and MODE=Vin, by the way. Is this a valid configuration? Verified Answer: Yes, but note that the actual delay time will vary widely...
    on May 18, 2012

  • Wiki Page: TPS62261-Q1: Momentary minus voltage on SW node

    Chris Glaser
    Q: TPS62261-Q1: Momentary minus voltage on SW node by 1878258 My customer is concerned with momentary minus voltage (-0.7V) at SW pin as shown in the below picture. I think this is from the body diode of the low side FET when it is off, and quite a normal operation. However, since the absolute...
    on Jan 5, 2012

  • Wiki Page: TPS62240/60/90 - can it start into a pre-biased output?

    Chris Glaser
    Q: TPS62290 - can it start into a pre-biased output? by 145034 Can the TPS62290 safely start into an output that is pre-biased to some voltage? Will it sink current from the output? A: Re: TPS62290 - can it start into a pre-biased output? by 1090425 This device can start into an output pre-bias...
    on Dec 29, 2011

  • Wiki Page: TPS62260 sink current?

    Chris Glaser
    Q: TPS62260 sink capability? by 1099971 Is TPS62260 able to sink current? A: Re: TPS62260 sink capability? by 1090425 Yes, when the device is operated in forced PWM mode, negative inductor current is allowed. This is sinking energy from the output. This is useful for quickly recovering from...
    on Dec 12, 2011

  • Wiki Page: TPS62260, TPS62240, TPS62290, TPS62065: control method

    Chris Glaser
    Q: TPS62260, TPS62240, TPS62290, TPS62065: control method by 1838493 Our datasheet says: "During PWM operation the converter use a unique fast response voltage mode control scheme with input voltage feed-forward to achieve good line and load regulation allowing the use of small ceramic input...
    on Sep 29, 2011

  • Wiki Page: TPS62260, TPS62240, TPS62290, TPS62065: how to select inductor

    Chris Glaser
    Q: TPS62260, TPS62240, TPS62290, TPS62065: how to select inductor by 1838493 I was working with them through Switcher Pro and we tried to change VOUT conditions, 2.5V to 1.8V to 1V and load from 600mA to 230mA the inductor value stayed the same. Usually the inductor selection is based on 20%~40% ripple...
    on Sep 29, 2011

  • Wiki Page: TPS62290 - EN > Vin?

    Chris Glaser
    Q: TPS62290 - EN > Vin? by 574 A question has come up regarding the enabling of the TPS62290. I see a spec in the datasheet that says that the enable needs to be below VIN + 0.3V. That makes sense to me but I have two questions: 1. Can you describe what happens if the spec is violated? ...
    on Sep 12, 2011

  • Wiki Page: TPS62260 SW switching waveform

    Michael Day
    Q: TPS62260 SW switching waveform by 318382 Our customer asks about the SW swtiching voltage looks exceed the ABS MAX voltage -0.3V. The attachment shows the evaluation result of both customer's board and TI EVM. Both of the SW wave form shows that SW voltage is down to -0.7V in larger than 100mA...
    on Jul 8, 2010

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