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  • Forum Post: Re: TPS40210 Switch pro values

    Peter Miller13277
    Sunil, There was an error introduced into the inductor selection process for the TPS40210 model in Switcher Pro. This will be corrected in the next release of Switcher Pro. In the mean time, I recommend using the Inductor equation from the TPS40210 datasheet and replacing the Switcher Pro selected...
    on Mar 29, 2010

  • Forum Post: MC33063A (MC34063)

    SRI L
    Hi, I am using MC33063A as buck boost converter. I want controllable power supply, with low distortion. How can Iachieve this ? In MC33063 or MC34063 datasheet, I found ckts for either buck or boost but not both at same time..Can I do this with MC33063 or CAN I GET any IC's to do this .. suggest...
    on Jul 2, 2010

  • Forum Post: Re: Inverting DC-DC Converters with Negative Input Voltage and Positive Output Voltage

    Peter Miller13277
    Here is a schematic you can base your design on. Let me know if you have any questions.
    on Jul 28, 2010

  • Forum Post: TPS61220 - Start-Up Time

    Sebastian Ortega
    Hallo, I want to use the dc-dc voltage converter TPS61220 for my application. I have looked for the device start-up time, but any concrete value appears in the datasheet. It is only mentioned that the start-up time depends on input voltage and load current. How long would be the time in the...
    on Aug 9, 2010

  • Forum Post: Using MC34063A for White LED drive of 8 strings of 3 LEDs each with brightness control

    BrandonAzbell
    The topic of using a MC34063A for LED drive has been brought up before. Certainly, the MC34063A can be used in a boost converter topology to drive a string of White LEDs. However, if it is possible to implement a brightness control with the MC34063A, how would that be done? I realize there are other...
    on Dec 24, 2010

  • 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

  • Forum Post: External Current-Boost for MC33063 buck converter

    Renjith Narayanan
    Hi For my project i want to use a dc-dc converter input 24V Output 5V,1.5A I am using MC33063 with external current boost transistor (npn), is anybody worked in this circuit Also please share the critical points to be taken care Any answer in this will be appreciated With Best...
    on Apr 28, 2011

  • Forum Post: Implementing Over-Discharge protection with TPS61027

    Alexander Becker
    Hello! I'm designing a Circuit, which is powered by 3 Ni-MH cells. To prevent over-discharging I would like the converter to disable itself when the battery voltage reaches 3.0V. Apart from a resistive divider on the LBI pin, what external circuitry would one use to achieve this?
    on May 10, 2011

  • Forum Post: TP40210 - Automotive Application - Vin = 12V, Vout = 24V, Iout = 10A?

    Edgar
    Hi I've reviewed the information in the DataSheet and done the calculations myself I've included the xls file with all the formulas, the tabs are labeled accordingly to the component that is being evaluated If you need to find any label just look under "Insert/Names/Define" or...
    on May 13, 2011

  • Forum Post: supporting circuit for UCC39413

    Mark Arnold78985
    Dear all, I would like to characterise the working behavior of the UCC39413 voltage boost converter. I use a 0 to 5 V power supply and a triangular voltage profile to characterise the startup and shut-down behavior. But even though I variated the values of supporting capacitors and inductors, the...
    on Jul 12, 2011

  • Forum Post: Limiting inrush current in TPS61220 family

    Ryan Aylward
    I am testing a new design using the TPS61222 to generate 5V from a 2AA battery pack. The 5V rail is only required for a subsystem containing LEDs - the MCU runs directly off the battery. When the regulator is enabled in order to supply power to the 5V subsystem, an inrush current of up to 200mA is possible...
    on Nov 21, 2011

  • Forum Post: Re: Designing an inverting buck-boost: 2.9Vin to -5.2Vout @ 2A min

    Joseph Varghese
    DC-DC converters for pd value 1.3 to 3.9 volts input converted to -5.2 v is available in the market for Current rating of up to 69 Amperes. Assembly details come with the product. wish you well. Regards, P. Joseph V.
    on Dec 3, 2011

  • Forum Post: 1.5V to 1.8V(Iout=2.0A~3.0A) Boost IC sorting

    Jin Kim
    Dear All Do you have appropriate boost IC? If you have, please let me know Vin = 1.5V Vout =1.8V Iout = 2.0A ~ 3.0A (3.0A is better)
    on Jan 5, 2012

  • Forum Post: NON ISOLATED BOOST CONVERTER

    John Wiemeyer
    Support, I am working with a customer on a new boost convert design with the following specifications: Vin: 3.0V to 3.6V, Vout: 12V and Iout: 30mA to 50mA. Price and efficiency are important to the customer. They want low cost and efficiency of better than 90% . I originally recommended an LM64010x...
    on Jan 6, 2012

  • Forum Post: BOOST CONVERTER

    eli
    looking for boost with: Input voltage (1.5-2)V variable output voltage up to (16-20)V build in isolation FET power up to 150mW miniature case I found only from 1.8V .(TPS61040)and from 1.6V but for Vout max is 17V
    on Feb 19, 2012

  • Forum Post: LM3488 possible latch-up mode

    Stephen Soos
    I have the LM3488 designed in many of our standard products configured as a simple boost converter. One in particular, is our series of lower power (<10watts) LED drivers. I have the LED return current flowing thru a sense resistor that develops the feedback voltage on pin 3. I like this current-mode...
    on Apr 3, 2012

  • Forum Post: Any effective chip for 3.3V -> 9V boost case?

    Gamin Inganela
    Hi all, The following seems like a very common and simple scenario and yet I am unable to find any part or straightforward method to achieve it: Our device will be powered by a single-cell Li-ion battery (thus, 3.0 to 4.2 Volts supply). On the circuit, we have a 24-bit sigma-delta ADC (the TI ADS1252...
    on Jul 3, 2012

  • Forum Post: RE: TPS40211 Boost converter full loading question

    water hsiu
    Hi Anthony, Thank you so much for replying and so soon! About your questions : 1. Yes, the 3 circuits are seperated exist,all 12 to 24 V at 5A. 2&3. I have put the schematics and the pictures of waveform in the attatched file. (Please visit the site to view this file) Thanks again. Regards...
    on Jul 26, 2012

  • Forum Post: TPS40211 Boost converter full loading question

    water hsiu
    Sorry I find out that I posted the wrong palce so I post again here. = =" Hello, I want to use TPS40211 to make three converters from 12V input to 24V output, 120W full loading and operating in 100K, 300K and 600KHz respectively. I use the exsample circuit on page 26 of datasheet. And it turns...
    on Jul 25, 2012

  • Forum Post: LM3488 very low Vsupply

    Jeppe Odgaard
    Hi! I'm developing a boost converter that uses a 3,9V supply and boost a 0,5V input to a 3,9V output. The current is also quite high (some amps), so there is some loss in the external components. Therefore I've chosen the LM3488 since it can provide a 100% duty cycle. I want a high duty cycle...
    on Oct 24, 2012

  • Forum Post: TPS61020 Induction calculations

    David Linker
    I am designing for a low-current application. Peak current will be ~ 30 mA, in very short bursts, and average current will be < 200 µA during operation. The power will be from a coin cell (BR probably but CR possible) at ~ 3V, while the circuit will run at 3.3V when operating. In addition...
    on Oct 19, 2012

  • Forum Post: BOOST

    eli
    looking for a small footprint dc to dc for 12v to 58v/ 2-4A
    on Dec 30, 2012

  • Forum Post: 3V to 20V Boost for Low Current Application

    John Ramshur
    I need to boost 3V to 20V, but only need <1mA of current. I need a very small solution for my portable device. Most boost converters I find seem to not operate at at very low output currents. What would be the best way to generate <1mA at 20V?
    on Jan 10, 2013

  • Forum Post: TPS40210, overcurrent/duty problem

    Jesse Karadia
    Spec: 9V in, 80V out @ 40mA I used webbench for the design, The first problem is that it has trouble starting, since very quickly after it starts current overprotection kicks in and PWM turns off while SS drains. This can be overcome by shorting the sense resistor for a second, or slowly ramping...
    on Jan 20, 2013

  • Forum Post: Can SM72442 be used in a boost DC-DC converter for MPPT?

    BEN ZHAO
    Hi, Does any body know that can SM72442 be used in a boost DC-DC converter in PV? On the datasheet of SM72442, there are four output signals for a buck-boost converter. I am not sure if this ic can be used in a boost converter to realize MPPT. Can I use only one of the PWM output signals for the boost...
    on Mar 22, 2013
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