Questions tagged [buck]
A non-isolated DC-DC converter topology which outputs a voltage less than or equal to the input voltage.
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Is it true that power supply design is difficult when input voltage range is wider?
During power supply (buck converter) testing, I had seen the lowest efficiency values corresponding to highest input voltage. I thought if the design meets this worst case scenario, it should be ok no ...
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EMI Filter For Low Power SMPS
I've designed a 1.25W buck converter which is fed by 220VAC(85-265) and has a 5V output. Now I'm trying to design a EMI input filter for it. I don't have a PE connection so I didn't use a CM filter so ...
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Buck converter with state feedback: does changing the input voltage changes the dynamic of the converter?
Short question: in a buck converter with state feedback, do changes in the input voltage cause changes in the dynamics of the output voltage (and inductor current)?
The problem: let's say we have a ...
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EMC (radiated emission test) issue in buck converter
i am designing CV smps 12V 1A (with EMC design) post that output side i will use dc to dc buck (Vin-12V Vout-9V, 400mA) or Boost convreter (Vin- 12V VOut-36v, 100mA). which configuration will be more ...
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reverse voltage polarity protection
I'm thinking about making a reverse polarity protection for a buck converter AOZ1284, and I've found this article design-guide-pmos-mosfet-for-reverse-voltage-polarity-protection
I didn't find the ...
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Powering buck converter using charged capacitor
Is it possible to design a buck converter using a charged capacitor to get regulated voltage output? When the capacitor voltage falls below some threshold value the inductor should be able to provide ...
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Inconsistent Output Voltage in DC-DC Buck Converter
I'm trying to implement the following tps54302 DC-DC buck converter, for a 5V 3A output:
All resistor values 1% tolerance, capacitors 5% tolerance, inductor 20% tolerance.
I'm testing with a bench ...
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Stability of Buck Converter when output capacitance is variable
I am designing a buck converter for an application that has several different loads. Depending on what devices are connected, the capacitance seen at the output of the buck converter can vary ...
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NCP3420 failing in buck converter
I designed a constant current buck DC-DC super-cap charger with the NCP3420 as a dual MOSFET driver. The current is hysteresis controlled and the disable and PWM lines are pulled low on power-up.
The ...
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Any specific precautions should be taken when using 2x AA LiSOCL2 batteries in parallel?
I am working on the wireless sensor design and one of the sensor is such that it needs to be kept ON through out the operation and it takes supply of 3V and current of about 100uA, which I think is ok ...
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Advanced ATX Power Supply Modifications
I know there are multiple tutorials and questions regarding converting an ATX power supply, new or old, to a benchtop power supply for projects. I'm fully aware of how to make the basic conversion to ...
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very high current buck converter
Need to convert 40 volts to a 24 volt 2000 amp 1 second duration pulse. long duty cycle. Current must be settable from 500 to 2000 amps and time from 0.1 to 1.0 seconds. Ideas please.
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Calculation for the Boot Strap capacitor
For design of a synchronous buck converter (which would be used to charge the battery) which would be driven by Micro-controller's PWM output, i selected the IRLB8748 NMOS Power transistors (for both ...
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Suitable switching/buck regulator - Vin = 24V and Vout = 5V and max current = 0.4A
Due to a sudden change in design requirements with regards my circuit supply voltage I'm looking to change my voltage regulation on my circuit from the classic LM7805 linear voltage regulator to a ...
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Variable switching duty cycle for buck converter even if input voltage and output load is constant
I am testing a BUCK converter and observed that has a variable DC when supplied at input voltages lower than 9.5V (if input voltage is higher than 9.5V the BOOSTER stops and DC is constant). The BUCK ...
