All Questions
Tagged with current-sensing switch-mode-power-supply
10 questions
1
vote
2
answers
94
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How to sample current in high-kHz to low-MHz [closed]
I am working on a project that, at its simplest, is a switching circuit (either a half-bridge or single switch) connected to a resonant filter. I need a way to measure/sample the current going from ...
- 41
0
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0
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62
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Current sensing in DC-DC converter
I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
- 341
1
vote
1
answer
100
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Choosing an adequate op-amp for shunt resistor sensing in SMPS applications
I would like to get some industry experts / design engineers opinion about potential methods to improve the proposed shunt resistor current sensing method below. The intention is to improve this ...
- 45
1
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2
answers
294
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Inrush current on current sense resistors
The problem is on a circuit which implements PFC circuitry.
There are two parallel 0.36R current sense resistors located in the inrush current path. These resistors measure the PFC current through the ...
- 11
1
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2
answers
98
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How critical is the sense resistor?
In the following topology, two 0.68 ohm resistors are paralleled to result in 0.34 ohm for sensing the source current. Can I use three paralleled 1 ohm resistors to result in 0.333 ohm? Does this ...
- 755
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votes
1
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171
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Sensing current into a battery while charging
I want to sense the current into a 84 V battery while charging and disconnect it when fully charged using a MOSFET. Is it advisable to use lowside current sensing? I used a noninverting opamp ...
- 101
0
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0
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139
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Designing high bandwidth current sensors for inductor current sensing
I am designing a high-frequency current sensor, suitable for sensing +/- 20 Amps at frequencies of 200kHz. This is being used in average current mode control application in an isolated forward ...
- 93
0
votes
3
answers
890
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Current Sensing on positive and negative voltage rails
I'm working on a design that uses two separate buck regulators to generate a positive and negative voltage, and I'm trying to implement current limiting with a current sensor. However, I am running ...
1
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0
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75
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Buck converter design using MCP1630V
I have already designed a buck converter with the following specifications using an MCP19035:
Vin=14V,
Vout=1.8V,
Fc=63kHz(Crossover frequency),
Vref=0.6V,
Iout=10A
step load High IOH=7.5A
step ...
- 1,078
0
votes
1
answer
387
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SMPS Current Sense Resistor Selection
I am looking into using an SPV1040 boost converter to charge a battery from a solar cell. The chip includes inputs for a current sense resistor, which are described in one of ST's applications notes ...
- 169