Questions tagged [dcm-ccm]
7 questions
8
votes
6 answers
Why do we allow discontinuous conduction mode (DCM)?
I know that DCM occurs when ripple is greater than the DC component, but why would we allow ripple to be greater than the DC component? Don't we see ripple as something undesirable and try to minimise it? Does DCM occur because there are some…
Urthona26
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3
votes
1 answer
Output capacitor for a boost converter in DCM
I'm designing a boost DC/DC converter for a backlight (it needs to be constant current but it's not relevant to the question).
Starting from a 5V preregulated rail I need to go to about 25V 30mA; nothing too exciting.
Usually I work with the TI…
Lorenzo Marcantonio
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2
votes
1 answer
Perturbation and linearization for boost converter
I'm developing a boost converter (runs with DCM, and has \$n\$ turns ratio transformer) for uni which controls the input voltage with a constant output voltage. I'm at loss on how to get the transfer functions of the converter. Averaging the circuit…
Grigoris
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1
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0 answers
DCM and CCM Behaviour in LLC Converters
I've been refreshing my power electronics knowledge these days. During my re-visit to the LLC converters, I've come across this application note.
It also explains the behaviour of an LLC converter at DCM and CCM conditions, at page 6. Excerpt from…
Rohat Kılıç
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0
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Forced DCM for Buck-Boost converter
For a SiC MOSFET-based boost converter which operates in synchronous boost converter mode, under low load condition (less than 10% of load) i.e. when the load is less than 500 W for a 5 kW converter, How do you force the converter to operate in DCM…
Power_Electronics
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Boost converter Controlling problem when transfer from light load to heavy load
I built a boost converter to boost voltage from 200V dc to 400V dc. Power rating is 5kw,
I added a PID to regulate the voltage. The problem is, when going from light load to heavy load, output voltage causes overshoot. After going to heavy load,…
Damith Pavithra
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In buck converter what will be the MOSFET source node voltage (floating point) with respective MOSFET gate for driving the N-MOSFET turn ON
To turn on N-MOSFET (high side) what should be the gate voltage (Vgs) in buck converter before turn on and after turn-on of MOSFET.
Case 1 (As per my understanding): To turn on the MOSFET the gate voltage should be greater than Vs (MOSFET source) +…
