An ASIC power supply is a complex electronic device that provides consumers (hash boards and control board) with stable electrical energy with specified parameters. The performance of the connected devices depends on the high-quality voltage supplied by the UPS. You can understand the principle of operation, learn how to properly repair the power supply units of miners and other electronic devices by completing training in UPS repair.
The current consumption during the operation of an electronic device can fluctuate significantly. This has a negative effect on the operation of its various units. Therefore, the UPS must be selected for the peak power consumption. The maximum power consumed by the miner can be calculated using the formula:
P = U * I
U – the output voltage is 12 volts
I – max consumer current (connected load), measured in Amperes. When choosing a PSU for ASICs, you need to study the factory documentation for the miner
P – the power of the source is measured in watts.
There are two main types of PSUs:
Powerful electronic components depend on the quality of the incoming voltage. And this is usually the high-quality operation of low-current UPS units.
To connect ASICs, a wide variety of power sources are used that provide the necessary power to the load for the stable operation of hashboards. The most common power supplies for miners are: APW3, APW7, APW8, APW9, APW12, Ant, Avalon.
UPS failure occurs much more often than other electronic components. This primarily depends on the quality of electrical energy, the correct connection of the load to the power source in terms of power, the quality of the connections in the connectors (connectors).
The ASIC power supply is a high-voltage unit for primary circuits, consists of radio components, operates at an alternating current frequency of 50 Hz.
Almost all power supplies perform similarly. PSMPUs perform the following functions:
The manufacture of blocks is carried out by various circuit designs. To change the voltage, transformers are used, less often capacitors are used. A PSU is used to stabilize the voltage and protect against ASIC overloads.
Benefits of using a UPS:
Disadvantages of using a UPS:
To repair low-power ASIC power supplies, you can use a soldering station, for example Quick 861DE. For more powerful ones, a soldering iron is needed with a constant soldering temperature of 300-350 degrees Celsius and a power above 80 W for soldering power elements (diode assemblies and transistor switches used in miners’ power supplies). To avoid damage to the printed circuit board, it is necessary to warm it up with a hair dryer with an outlet temperature of 260 degrees Celsius with an average air flow.
To check the condition of electrical circuits, you must use a multimeter. Use tweezers to solder small parts. Dismantle the power keys using a desoldering pump. An oscilloscope is also required to test the operation of PWM controllers.
An ASIC repair technician needs:
The sequence of diagnostics and repair of the UPS:
The number of ASICs is increasing on the territory of the Russian Federation. Investors enter crypt mining by increasing the country’s hash index for mining BTC, not always purchasing new equipment that often breaks down. Periodically our SC receives out-of-order powerful power supplies APW7, APW8, APW9, as well as their modifications.
Let’s consider the structure and principle of operation of PSMPU data. Since the principle of their operation is similar, we will take APW8 for the example under consideration.
APW8 power supply unit consists of:
The main voltage output is controlled by the PIC port, and the constant U of different models varies from 8 to 20.04 V. The main unit current output is adjustable to 110 A, the auxiliary board fixed current output to 5 A.
This PSMPU has the following main working nodes:
The ASIC power supply installer needs:
During the diagnostics of the APW8 UPS, you must:
After maintenance and troubleshooting, any UPS should operate for 2 hours at a rated load of 80%. If the ASIC PSU has worked stably, the repair can be considered complete.
Original power supply unit APW8 released by BITMAIN
Dimensions – 20 x 15.7 x 4.2 cm
Power – 1.85 kW
Weight (packed) – 1.7 kg
Noise level – 67 dB
Constant output U – 12 V
Auxiliary power supply rated current – up to 5 A
Maximum output current of the main source – up to 110 A
Rated input U – 220 V