Questions tagged [ac-dc]
Questions regarding the safe and effecient design and implementation of AC voltage to DC voltage supplies. Typically Mains to some lower DC voltage.
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Variable input 208V-600V AC to 24V DC without transformer
The Question:
How can I design a circuit for an automatic transfer switch that accepts 120V-600VAC and keeps some 24V batteries charged (long term trickle charge is fine). P.S. I would like to keep ...
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What damage or reduced performance would result from giving 120 V, 60 Hz AC power to a 115 V, 400 Hz AC/DC rectifier?
This is part of a larger project, and is one sub-question related to a higher-level question I've asked on Reverse Engineering. You may find useful background information there.
I have a controller ...
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My AC-DC PFC rectifier self-boosts voltage when with no load
I have made a PFC IC LT1249 reference design - a few differences are 820 uH inductor, 1.1 mF capacitor and different MOSFET.
When I connect AC (50 V) with no control (17 V) voltage the DC output rises ...
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Reusing a HP laptop charger of 3 wires (logic inside)
I have an HP laptop charger 18.5v 3.5A (1X2057... WBGST0A...)
In the past the charger was working fine and I removed the tip for an experiment, so I can't check wires measuring the original tip.
Wires ...
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SMPS for AC-DC conversion
The question is related to datasheet of part DK1203.
The datasheet description is as follows:
The DK1203 is a secondary side flyback type AC-DC Switch Mode Power Controlling IC. With integrated 700V ...
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What are the advantages and disadvantages of feeding DC into an SMPS?
Can I feed DC into an SMPS to get a regulated output? If yes, why? and What are the advantages and disadvantages?
For example, I would like to input 200VDC to an SMPS with an input range of 100-230VAC....
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Help me make sense of this guitar amp relay circuit
Here is a channel-switching relay from a guitar amplifier. It is supplied with 6.3 V AC. Closing the switch (near center) operates the relay. It's on a schematic that's taped to my wall, and I started ...
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Need to build a power supply from 127v AC to 3 DC outputs
I need to build a power supply that takes 127v AC and outputs 3 DC voltages: +90V, +1.4V, -4.5V. It is for a small tube amp, actually I'm powering the amp with batteries. I general terms, can you ...
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Having trouble understanding textbook explanation of "hot chassis" in full-wave voltage doubler vs half-wave
The textbook explanation is not doing it for me.
The half-wave voltage doubler shown in Fig. 4-27(a) offers some improvement in safety over the full-wave voltage doubler. Compare Figs. 4-24(a) and 4-...
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Why does a "better" Schottky diode result in inferior AC-DC converter performance?
I have an AC-DC converter that outputs 6 A current at 12 V output. It's based on the CR6850 PWM controller. The schematic diagram is attached.
I need to increase the output current to 10 A. The high ...
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XL4016e1 maximum input current
I have an XL4016e1 dc-dc converter circuit,
the output of the circuit is 12V 6 A .
What should be the current value of the power supply to obtain this current?
thanks
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Selecting PFC topology
I'm considering different PFC topologies for the AC-DC stage of a device around 1 kW with aim of optimizing for efficiency and secondarily component size. This far I have identified following options:
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Output OVP ratings in isolated AC-DC converter
I have an application where there can be considerable inductive flyback current into the supply rail, to raise it above the level naturally outputted by the AC-DC converter (48 V). Namely, the full ...
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DC circuit works well and AC does not
I have the following circuit that consists of a power supply that, despite the redundancy, powers a 12V lamp and an arduino with 4 solid state relays. I do the tests with a direct current laboratory ...
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DIY power source input 6 VAC, 9 W, 1.5 A, output 6 VDC, 1.5 A
I have an AC generator of 6 VAC and 9 W power output. It is on an old bicycle motor, a BSA winged wheel. I intend to run NiceLite 3-6 VDC LED lights rated at 1 W each, one red and one white.
I ...
