Non-Isolated DC/DC

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Non-Isolated DC/DC

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Non-Isolated DC/DC
Related Posts

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

    Amit Mane
    Hi Peter, Thanks for your information. Please find below feedback from my customer: Customer application requires proper isolation of the unit from the other systems attached with it. If it is a transformer isolated one, we can just reverse the voltage connections to avoid 'mirror'ing...
    on Aug 3, 2010

  • Forum Post: TPS54425 Inductor value.

    Veera Akula
    Hi, We are planning to use TPS54425 to convert 12V to 4V at 4 A. What would be the Inductor (L1) value for this application. Regards, Veera.
    on Nov 10, 2010

  • Forum Post: Re: TPS54425 Inductor value.

    Veera Akula
    Thank you John. Regards, Veera.
    on Nov 11, 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: 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: Re: TPS40090 / TPS40091: What is the relationship between the SYNC frequency and the PWM switching frequency?

    Roger Ding
    I have a question about TPS40090,How to get “TPS40090 Pspice model”for simulation?
    on Jun 27, 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: TPS63000 quiescent current issue

    Paul Ren
    When my customer uses TPS63000, they found its quiescent current exceeds 3mA with 3.6V input and 3.3V output without any load. According to the datasheet of TPS63000, the Iq should be below 50+1.5uA. After changing the 4.7uH inductor with 2.2uF as typical circuit on datasheet, the quiescent current increases...
    on Sep 8, 2011

  • Forum Post: Looking for a low speed PWM Controller

    Alexandre Marquis
    Hi, I need a 30V ,30A, 400Hz PWM output power stage near 100% PWM. I'm looking for a PWM controller with a frequency of 400Hz. What I need is a low frequency current mode controller to drive my high side switch, to be able to protect my Hi-side Mos in case of short at the input. I'm...
    on Sep 13, 2011

  • Forum Post: TPS54610

    James Fuerherm
    I am using two of the TPS54610's in an application but discovered I need to have ratiometric tracking during startup for these two voltages. I am using the preset internal soft-start time; aka no external capacitor. Can this be done as simply as tying the two SS/ENA pins together? Would I need an...
    on Sep 30, 2011

  • Forum Post: MC33063A Evaluation

    John Mathew
    Requirement: Input : 24VDC Regulated Output : 3.3VDC/0.2A Regulator Used : MC33063A (SO-8 Package) I'm facing below mentioned Problems: 1) Efficiency <40% (MC33063A temperature rise is very high) 2) Unable to load 0.2A on the 3.3VDC output (3.3V output drops) 3) In the above...
    on Oct 13, 2011

  • Forum Post: MC33063 Inverter Vout -7V, Vin 15-25V (>6V) possible?

    Staffan Bruce
    Hello, We need a voltage inverter providing -7.0V 50mA. In the datasheet for the MC33063 there is an example showing almost this, but the input voltage is limited to +6.0V. Our input will be between +15 and +25V. Is this possible? Following another thread, it seems like the important limitation...
    on Dec 7, 2011

  • Forum Post: Regarding TPS40211 tests

    Ganesamurthy
    Am assembled 2 Nos of TPS40211 EVM PCB for DC DC LED Driver and Started to test one board first I set the input Voltage12V from my LPS, i got output 55v to 65V oscillating voltage output and then i connected load 2 strings of 12 LED series (3.3V/350ma LED). I didn't get continuous output and my light...
    on Jan 13, 2012

  • Forum Post: TPS54231 not delivering expected output current

    Sigurd Peterson
    I used SwitcherPro to design a supply using the TPS54231 with 10-14V input, and 3.3V out @ 1.1A. It's report is attached. I used ceramic caps for C9 & C2, B240A for D1, SRR1240-150MCT for L1 and matched the recommended layout as closely as possible. It is a 4 layer board with a ground plane next...
    on Feb 20, 2012

  • Forum Post: LM5008A ability to meet MIL-STD-1275 100V surge (50 msec) and crowbar shutdown

    Global ET
    We are investigating the use of the LM5008A 100V, 350 mA Constant On-Time Buck Switching Regulator as a pre-regulator for a 28V-based military vehicle, which must meet MIL-STD-1275 and be able to have its output shutdown with an SCR crowbar (short to ground). The incoming vehicle battery bus (28 VDC...
    on Feb 21, 2012

  • Forum Post: Parametric search is badly organized

    Olli Männistö
    The DC/DC parametric search is good in theory but in practice many of the key fields are missing for many controllers. "Synchronous rectification" flag is not filled for many controllers which imply "syncbuck" in the description. PWM mode (CMC/VCM/DCAP/OTHER) field is rather sparse...
    on Mar 14, 2012

  • Forum Post: TPS54331 Failure

    dan chambers
    I have been trying to debug my TPS54331 circuit (3.7V to 3.3V) for a couple weeks now and have not come to any solutions. I am floating the EN pin and the voltage is 2.93. My BOOT to PHASE, Diode, Inductor, and Output voltage do not look like normal behavior at all. I am using a 30 ohm load also. ...
    on Mar 21, 2012

  • Forum Post: TPS51315?

    eli
    need a DC-DC converter that can produce out of a low voltage input an output for the core of my CPU : from 5V input to 1.05V @ 6Amp @ 85c ambient !! I searched in the Switcher Pro and found that the TPS51315 can do this task. 1. Do you have a better suggestion (make sure that also after the 85c...
    on Mar 26, 2012

  • Forum Post: Power Supply Regular - Thermal pad via filling

    Dhamodharan Nagarajan
    Hi, We are using following Power Regulator ICs in our design. TPS54620 Switching Regulator – 8V with max 4A load current used in our board TPS73801 LDO – 5V with max 1.5A load current used in our board TPS7A4501 LDO – 5V with max 1.5 A load current used in our board ...
    on Mar 29, 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

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