All Questions
Tagged with ac-dc switch-mode-power-supply
40
questions
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21
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How should I come up with a power supply for 5 motors, one micro-controller (ESP32) and one microprocessor (Jetson Nano) for an object sorting arm
I am trying to design a power supply for a robotic arm with 5 servo motors(2 are MG90S and 3 1501MG motors). I'm planning to use an ESP32 microcontroller and Jetson Nano.
I have the option of using ...
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votes
0
answers
93
views
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 ...
- 1
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votes
1
answer
283
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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 ...
- 12k
5
votes
2
answers
627
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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....
- 142
2
votes
2
answers
612
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Why doesn't SMPS controller VCC capacitor get fully charged to 310 V?
Most SMPS circuits have a startup circuit like the one in the schematic below:
The rectified 310 V goes through Rstartup1 and Rstartup2 to fill Cvcc to UVLO limit and the controller IC starts working....
- 663
4
votes
2
answers
921
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How do medical SMPS achieve lower Earth leakage compared to "regular" AC-DC SMPS?
When using a "regular" (i.e. not medical grade) AC-DC isolated SMPS in the following fashion, a strong mains common-mode voltage is created on the DC side due to - I believe - the stray ...
- 22.5k
0
votes
1
answer
107
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AC\DC misbehaving when DC\DC converter connected as a load
I am feeding the output of an isolated ACDC converter (this one) into a DCDC converter (that one), and the ripple out of the ACDC supply jumps by a factor of 5 when the DCDC converter is connected - ...
- 9,906
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3k
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DK1203 Flyback SMPS - How does it work?
Has anyone come across a DK1203 SMPS like this? I've come across ICs like the FSGN300N that have a startup pin and aux coil to supply the IC. How would the self-supply circuit in the DK1203 work? In ...
- 71
10
votes
5
answers
876
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MOSFET failure in a high power AC-DC SMPS buck converter
I've made a AC-DC step down buck converter that converts 220 VAC to a variable 45 to 70 VDC at 5 to 10 A to charge a Li-Ion battery. I'm currently using ESP32 to drive a MOSFET driver (IR2110) to ...
- 101
1
vote
1
answer
222
views
How do I calculate the number of turns or inductance while designing a transformer?
I was trying to design a transformer for a SMPS but can’t find any resource to calculate the number of turns and the core area. I know that the turns ratio has dependency with the signal frequency. If ...
- 2,519
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101
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Step down 5V Power supply for IoT
I am trying to create common DC power supply to support ESP32 Development board, Servo Moter (MG995) & Fan Motor (0.2A), all required 5V DC. I am considering Hi-Link 5V 4A SMPS Mini PCB Mounted ...
- 101
0
votes
2
answers
242
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24V Bridge Rectified Relay Circuit blowing L7805 & PIC18F
I've got a circuit which is powered using a 24VAC transformer fed into a KBU606G full bridge rectifier to generate 24VDC. Originally there was a 470uF smoothing capacitor, however I was unaware that ...
- 11
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votes
1
answer
131
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12VDC from two different 230Vac voltage sources
I want 12VDC from two different AC source such as Main and DG supply. At a time only one source will be present. Right now I am using the circuit as shown below.
Is there a way to replace two ...
- 1
-1
votes
1
answer
80
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I designed a circuit to receive multiple AC voltages at the input and constant voltage at the output, but I wonder if the circuit makes any sense
I wonder if this circuit has any meaning and if it will work as I expect.
I would like to know before I build it, due to lack of time.
What I want from this circuit is to give motorcycle lamps the ...
user270262
0
votes
1
answer
349
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withstand voltage of AC DC power module
i read the datasheet of irm=20-5 which is a AC DC power module it takes a input of voltage of 85-305VAC
and converts into 5V DC at output ,in the datasheet it is written that the withstand voltage is ...
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