Sigma22 Fully Discrete Regulated Power Supply (Dual Rail±5V ～±36V) DIY KIT

Description: Sigma22 Fully Discrete Regulated Power Supply (Dual Rail±5V ～±36V) DIY KIT DIY KIT ProjectTo complete this project, high level knowledge of electronics and rich experience in terms of soldering and testing are required.Due to time zone and language communication restrictions, we can only provide limited technical support, and you need to solve problems by yourself. We do not provide information other than the product introduction page.MOFI-Sigma22 Fully Discrete Regulated Power Supply (Dual Rail±5V ～±36V) DIY KITAll-discrete topologySingle-pass, series regulator design.No IC (integrated circuits) are used.The negative regulator is a complementary mirror image of the positive regulator.Low noise, high PSRR.A constant-current source feeds a zener diode as a stable voltage reference. A low-pass filter (with a corner frequency of 1.6Hz) prevents zener noise from being introduced into the error amplifier. The low-pass filter also provides a soft-start characteristic.The error amplifier is a discrete implementation of an opamp with a high open-loop gain of 102.5dB. The voltage supply to the error amplifier is isolated with capacitance multipliers to boost its PSRR (power supply rejection ratio).A long-tailed pair differential amplifier with current mirror and constant current source forms the first stage of the error amplifier. The second stage is the voltage amplification stage (VAS), also with constant current source load. The 3rd stage is comprised of the power MOSFET output devices configured as a source follower.The positive regulator's output voltage is based on the reference zener voltage and the gain of its error amplifier.The negative regulator's voltage reference is the output voltage of the positive regulator. Its error amplifier has a gain of -1, so that its output voltage is the inverse of the positive regulator's output voltage. The negative regulator dynamically "tracks" the positive regulator -- any small voltage fluctuations on the positive rail also appear inverted on the negative rail, improving the CMRR (common mode rejection ratio) of the amplifier being powered.The tracking behavior means that the voltage on both rails rise and fall equally.High-current MOSFET pass transistorsThe high current rating provides a very high safety headroom against overcurrent damage.Onboard heatsinks can be used which would allow the S22 to supply up to 0.3A continuous (with much higher peak currents). More sustained currents are possible by using larger, offboard heatsinks.The negative temperature coefficient of MOSFETs prevents damaging thermal-runaway conditions that may plague conventional BJT devices.Configurable for rail voltages up to ±36V. The voltage is selected by using an appropriate reference zener diode, choosing the value . Typical output voltages are ±5V, ±9V, ±10V, ±12V, ±15V, ±18V, ±24V, ±27V, ±30V or ±36V.Do not short the output terminal to discharge capacitor, otherwise it will damage the power board.Product configurationDIY kit: Contains the PCB and the components needed on the PCB, but does not include the power transformer .Finished board: Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test.All finished pcbs are all carefully hand-soldered and fully tests, so the price is higher and less cost performance. Price-sensitive consumers but with have DIY ability are recommended to choose the kit.SchematicPCB comes with component parameters for easy installation.We only refer the schematic of the amplification part of the circuit. If you need full circuit parameter, please read the component value with the PCB by yourself; we do not provide additionally.DIY KIT InstructionsSince the PCB holes are plated through, you only need to solder the parts from the bottom of the board. Do not drill or enlarge the holes because that would damage the through-plating.Clean both sides of the blank PCB with paper towel and isopropyl alcohol or electronics flux remover, then solder the components to the board, starting with the lowest profile parts. This means the resistors and zener diode. Then solder the small capacitors, small transistors, followed by the larger capacitors.Make sure the correct part goes into each position on the circuit board. Measure each resistor with your multimeter to ensure it's the proper value.Pay attention to the polarity of electrolytic capacitors, diodes, , transistors as well as the orientation.Clean up the solder flux residue from the board with isopropyl alcohol (or electronics flux remover) and a brush.Inspect all solder connections carefully, using a magnifying glass, to make sure there are no solder bridges or cold solder joints. Use a multimeter in ohms scale to check for short circuits.Typical ApplicationInput voltage VAC= (Output voltage +8)/1.414For example:±12V DC-OUT,Input voltage VAC=（12+8)/1.414=14.14VAC, Please choose Dual 15VAC；±5VDC-OUT Dual 9VAC-IN±9VDC-OUT Dual 12VAC-IN±12VDC-OUT Dual 15VAC-IN±15VDC-OUT Dual 18VAC-IN±18VDC-OUT Dual 18VAC-IN±24VDC-OUT Dual 22-24VAC-IN±30VDC-OUT Dual 26-28VAC-IN±36VDC-OUT Dual 32VAC-INParts list Payment Method: PayPal preferred Shippment:1. Shipping to international by China Post Airmail, every parcel will be registered with tracking number. We can also ship by FedEx/TNT/EMS for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment. 2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions etc, If you have not received your shipment within 30 days from payment, please contact us. Returns & Replacements & Repair:We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways. 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Price: 29.8 USD

Location: wuhan

End Time: 2024-10-15T06:14:03.000Z

Shipping Cost: 4 USD