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3pcs Mini DC-DC Adjustable Step Down Power Supply Module 12V 24V to 5V 3.3V 9V 3A mini360
3xSKUC32316
10 Reviews
USD
9.99
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| Qty: | 4-7 | >=8 |
| Price: | $2.88 | $2.72 |
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Description
- weight: 485 g
Features:
1. Adopt new imported chips.
2. The maximum output current is 3A, running 2.1A for a long time, and the surplus is sufficient. 3A runs for about 20 seconds and the chip enters the overheat protection and restarts. It can work at 3A current by cooling and cooling the chip.
3. Using a new design scheme, the circuit design does not need electrolytic capacitors and tantalum capacitors (electrolytic capacitors have short life, tantalum capacitors are in danger of explosion). Three large-size solid-state ceramic capacitors (MCC) are used in high-end circuits.
4. Using non-isolated DC synchronous rectifier, the circuit conversion efficiency is very high. The efficiency is 97.5% at 6.5V to 5V 0.7A and 94% at 12V to 5V1A.
5. The use of integrated inductance, low internal resistance, greatly improve the conversion efficiency. It reduces calorific value and improves efficiency, and has lower calorific value than common shielded inductor.
Note:
1. In the case of low static current, 12V input and output 5V voltage, and strip LED lamp indicator, the static current is less than 0.45 mA.
2. Connecting to car batteries without switching, can be on the ciga rette lighter line, or on the ACC power line.
3. Output integration can be adjusted and fixed voltage. Fixed output is not customized. It can be directly spot-welded on the board. Special voltage can be regulated by potentiometer. It is very versatile.
4. Output with LED light indication, convenient and intuitive indication with voltage output.
5. With enabling ports, the default mode of operation is low-level shutdown, which brings convenience to control.
6. Can be used to replace 78 series linear regulators, such as 7805 7812 and so on.
Specification:
Input voltage: DC 4.5-24V
Input voltage: DC 4.5-24V
Output current: 3A
Conversion efficiency: 97.5%
Switching frequency: 500Khz
Output ripple: 20mV
Load adjustment rate: +1%
Voltage adjustment rate: 0.5%
Dynamic response speed: 5% 200uS
Size: 18 x 10 x 3.8mm
Size: 18 x 10 x 3.8mm
Package included:
3 x Mini DC-DC Adjustable Step Down Power Supply Module 12V 24V to 5V 3.3V 9V
3 x Mini DC-DC Adjustable Step Down Power Supply Module 12V 24V to 5V 3.3V 9V
More Details
customers reviews ( 10 )
5
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By JirkaBG
ok doručeno
2023-03-20 00:00:00
By thevin
manque schema de montage
2023-02-18 00:00:00
By Bicanoo_Magic
This module is tiny as..... it's maybe 1cm wide x 1.5cm long. Great for USB type projects in cars etc. shrink wrap the board and wires and forget about it under the dash. Get rid of the cigarette lighter connection and free up the 12v socket.
2022-11-22 00:00:00
By John-Glammis
Smaller than I thought. However, running an efficiency test with uncalibrated equipment, going from 12 V to 5 V gave me an efficiency of 75% at 13mA and over 90% above 100mA. It ran cool at 1.1A out.
2022-03-31 00:00:00
By BurnerGRap
Awesome!
2021-10-29 00:00:00
By deadbyte
Perfect for my needs! Fast shipping.. Might order more..
2021-05-23 00:00:00
By Johnny_B_Goode
This is the tougher cousin to the 1.3A (1.2MHz switching) version. Whilst the voltage adjustment pot seems to be of reasonable quality compared to the crap ones used on the "Geekcreit® Mini DC-DC Converter Step Down Module" (and its clones), unless you need an in between oddball voltage setting (6 or 7.5 volts for example) and have the patience to finesse it onto the required voltage setting - it's very touchy, you'd be better off cutting the trace (at its necked point) which bridges the Adj option solder blob link (you can still blob this link if you need to restore the Adj option) and solder blob the required standard voltage option link.
Cutting the Adj option bridging link so you can choose a fixed voltage setting is a safer option - no risk of the trimpot falling apart or going open circuit to over-volt whatever 3.3 or 5 volt rail you're powering with just one volt short of whatever the input supply voltage happens to be (12 to 24 volts perhaps?).
Testing the fixed 5v option gave me a tad less than 5 volt (4.95 something volts). Ideally, I wanted a voltage between 5.2 and 5.3 volts so tried blobbing both the 9 and 12 volt option bridges instead which gave me 5.31 volts - right on the money as far as I was concerned. :-)
These "3A" versions run a lot cooler compared to the "1.3A" version when testing with a one amp load so should be more robust than their 'weaker cousins' whose overheating/overloading protection seems somewhat lacking since I manage to make a 1.3A one start emitting its magic smoke due to a 5v CMOS RRO dual opamp shorting out the 5v supply rail in a Mark II version of a DIY GPSDO I had been testing (most likely a design error on my part, now since remedied).
The specs mention 20mV of ripple noise which will be the RMS value. The peak to peak value will be approximately three times this value, circa 60mV p2p which is quite good and easily reduced to less than 10mV p2p with additional filtering if needed.
JBG
2020-06-30 00:00:00
By spawney
handy little modules that can provide a fixed 3 5 9 or 12 volts by cutting a track on the pcb & soldering a couple of pads to select the right voltage or can be adjusted using the small trimmer on the board.
2020-01-16 00:00:00
By abrzo
All ok
2020-01-12 00:00:00
By yasdum
It needs cooling or heatsink over 2A
2019-09-29 00:00:00
