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• 48 Volt Dc Transformer
• 12 To 24 Dc Converter

Find great deals on eBay for DC DC Converter 48V 12V in Electric Voltage Regulators. Shoko nakagawa sorairo days download mp3. 36V 48V 60V 72V DC to 12V DC Step Down Voltage Regulator Converter. Work in a state of high current, circuit board if you feel very hot, you should.

What is the most efficient way to step down 48V to 12V? I have a power supply that can output 48V at 40 amps. Assuming the power supply is perfect, that gives me 1920 watts. However, I'm powering some RC equipment such as ESCs and brushless DC motors that need 12V. The perfect step down would be able to push 12V at 160 amps. Is there anything more efficient than the regulators I have found which at most can push 12V at 12 amps?

The ones I have found:

1. Jan 22, 2018 - 1250W 12 Volt to 48 Volt DCDC voltage boost converters for use in. Industrial and grade 12V to 48 volt DC-DC Converters 25 Amp 1250 Watt. See the connection diagram below. Input reverse polarity by circuit breaker.
2. DC-DC Regulator Module: 36V/48V to 12V DC/DC Converter. Input and output not isolated;; Protections against overload, short circuit and low input voltage. DC-DC Regulator Module: Input 13-17 VDC / Output 12VDC (4 Amp rate with.

2 Answers

The most efficient way to create a lower voltage at higher current from a higher voltage at lower current is a type of switching power supply called a buck converter. For a buck converter, (watts out) = (watts in) - losses. For a linear regulator (current out) = (current in) - losses.

Buck converters up to 85% or so efficient are relatively easy to make yourself. You have to wake up and take it seriously to get over 90%. Getting 95% requires someone that knows what they are doing really applying themselves to the problem.

There is much written about buck converters out there, and the term 'buck converter' should be a useful search term. Therefore I'll only explain the general concept briefly.

When the switch is closed, current builds up in the inductor. When the switch is opened, the instantaneous inductor current must continue to flow. D1 provides a path for this current. Since the voltage accross the inductor is now negative, the current in it decreases. The switch opens and closes rapidly to add current to the inductor when closed and causes the inductor current to ramp down when open. The fraction of the time the switch is closed regulates the overall output current. This fraction is usually modulated by a feedback loop to regulate the output voltage. Jual serial silat tvb.

Due to the current path thru D1, the output current is higher than the input current. If all the components are ideal, no power can be dissipated, and all input power is transferred to the output.

I know Olin has answered this question and you have accepted it but I would recommend using a synchronous buck converter - it uses two MOSFETs and is more efficient and, surprisingly, easier to understand and control.

Imagine your 48 volts is fed into a circuit that chopped it up into a square wave of a certain mark-space ratio - this is what a sync buck converter does and, the average voltage of that square wave (when fed through a series inductor and capacitor to gnd), is a dc level that corresponds to the output level you need so, for an output of 12 volts you need to use two FETs fed from a PWM source that creates a 25% mark-space ratio.

This converts 48 volts into 12 volts.

If you have really low on resistance fets and a really low resistance inductor all you need to do is set the mark space ratio to 25% and, if the input voltage varies a bit, make this mark-space ratio modifiable by the input voltage changing.

Inevitably it is usually a bit more complex than this because even the best fets in the world drop a little voltage and so does the inductor and under heavy load conditions the voltage will sag - this can be countered by slightly increasing the mark-space ratio.

A non-sync buck converter isn't as efficient and is prone to more instabilities so I'd urge you to consider this route. A PWM circuit such as the LTC6992 is very useful as the heart of this type of switcher - it's a voltage controlled PWM oscillator.

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Product Details

The LT3845 is a high voltage, synchronous, current mode controller used for medium to high power, high efficiency supplies. It offers a wide 4V to 60V input range (7.5V minimum start-up voltage). An onboard regulator simplifies the biasing requirements by providing IC power directly from V_IN.

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LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

48 Volt Dc Transformer

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12 To 24 Dc Converter

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