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Results tagged with dc-dc-converter
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user 90588
DC-DC conversion. Implies conversion of a DC voltage level up or down. DC-DC converter can be isolated or non-isolated. Electronically it can be done by many kinds of circuits, depending upon the application (charge pumps, voltage multipliers, linear voltage regulators, boost/buck switched converters, etc)
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Output Capacitor RMS current
Remember that a capacitor doesn't carry DC current - it's basically a filter to minimize the ripple at the output.
Therefor when the inductor carries a current which is a sim of a DC load current plus …
- 20.4k
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Instantaneous change in DC electronic load power
There are two aspects to this. First is the speed (rate) at which the load transient is applied. Some (generally lower voltage, for processors) are designed for load transients of full load in << 1 us …
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Automatic buck-boost DC-DC 1-15 V to 5 V, 5 A
Since the additional energy you might get out represents only 10 % or so of the capacitor's storage, it may not be worth doing as it may degrade the overall efficiency of the primary buck mode by more …
- 20.4k
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Design of a high voltage system for solar car using MPPT with batteries and motor controller
If you have a PV system with a PV panel driving a (MPPT-regulated) DCDC converter whose load is a battery and/or a motor, then the DCDC will adjust the input current it consumes (and the PV will respo …
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Stability in a double-pole system
Because you add feedback around the native double pole system. This makes the characteristics of the system different from those of the L.C alone, and necessitates loop compensation.
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How does a switching regulator behave if its input is equal to its output?
Most DCDCs configured in buck mode will try to operate at 100 % duty cycle -- i.e. the high-side switch will be 100 % on.
In the LM2596, since the output is a BJT device, this means that the output ca …
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DC-DC booster functionality
Q1 turns on, connecting the end of L1 to GND. D1 is off, and so load current is (temporarily) supplied by C2. Current builds up in L1, and when Q1 switches off, L1 'wants' to keep the current flowing …
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Power Converters - Small Ripple Approximation
Fundamentally it means that the voltage across the inductor (=VIN-IR-VOUT, or -VOUT+IR) doesn't change significantly during that portion (HS switch on, or LS switch on) of the switching cycle. Therefo …
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Capacitance multiplier
You don't need R24, and would have better performance by adding an R (1k) between base and emitter of VT6.
This circuit is basically an emitter follower from the (filtered) signal on C30.
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MAX5035 Buck Converter Internal Body Diode
A diode is absolutely required for this IC to function. The VF of the diode is perhaps not so strictly required; a well-designed IC should not have strict requirements on this parameter (it should not …
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Adjusting Shunt Resistor Value
Fig. 2 in the data sheet shows 1 Ω resistors and 10 nF filter capacitors between the shunt R and the current sense input. You could put a 2 Ω between the 1 Ω's to attenuate by 2x.
This will have an i …
- 20.4k
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What is the purpose of capacitor C4 (47 pF) in the feedback network of this buck converter c...
Maintaining AC loop stability in a DCDC can be complex, although since this AP63300 uses a current-mode controller, it is a little easier. However it is still important to avoid adding unwanted respon …
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Can a synchronous buck converter be operated in reverse?
Yes, this works and is normal.
Note that there are some things to be aware of.
If the controller is a current-mode one, it may not be able to handle negative current flow.
While the circuit is boostin …
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Output current effect on inductor value selection for SMPS
Io*LIR is basically the ripple current in the inductor. It is reasonable to have this 30 % of the maximum load current, but in efficiency or cost considerations may be optimized with a different value …
- 20.4k
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I have made a 50W solar mppt charge controller, but don't have a solar panel. What can I use...
Assuming its a nominal 12 V panel, use a lab power supply. Set the output voltage to ~ 16-18 V, and set a current limit. This current limit represents the solar illumination level. So if it's a 12W pa …
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