# Search Results

Results tagged with Search options answers only user 1293
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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)

The LTC1872 is a current-mode controller - that is to say, the current information is used to establish the on-time of the switch. From the datasheet: During normal operation, the external N-chan …
If the converter is in continuous mode, $V_L = L \dfrac{\Delta i}{\Delta t}$ $\Delta t = \dfrac{0.4}{250kHz} = 1.6 \mu s$ \\$ \Delta i = \dfrac{V \Delta t}{L} = \dfrac{12V \cdot 1.6 \mu s}{100 …
You're not really missing anything. A switching power supply converts DC to DC by first converting AC to DC, then to AC, then back to DC: The input rectifier and filter converts the low-frequency A …
If you run your bucks at different frequencies, you need to be careful of beat frequencies - beating shows up as harmonic content on the input DC, and if unfiltered, the buck loop compensation may no …
Technically, any DC power supply powered from a PFC stage is a DC-DC converter, so your idea has some merit. It mainly depends on the PFC controller IC. Simple ones (which look only at bulk DC for UV …
As I understand it, a buck converter will have the input current off part of the time, so I would lose potential power. Not really. Most fixed-frequency PWM-controlled switch mode power supplies …
The choice of inductor is critical for numerous reasons: it dictates the ripple current sourced to the capacitors, and therefore, the ripple voltage imposed on their ESRs, which is your output rippl …
If the power supply has a range switch on the back (115/230), it most likely does not have PFC and you'll have a better chance of powering it up directly from DC. Make sure that all fuses are rated …
The description on the top of every page in the datasheet pretty much says it all: Current-Mode PWM Controllers for Low-Cost Flyback Supplies Step-down is facilitated by a flyback converter (th …
In many high-power AC/DC designs that I've worked on, we generally divide the ground planes up so that the power return is kept clear of the control return. The two planes are connected together at a …