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Item: 125661718739
Condition:New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is … Read moreabout the conditionNew: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller’s listing for full details. See all condition definitionsopens in a new window or tab
Compatible Brand:Universal
ZERO-ZONE:ZERO-ZONE
Type:linear Power supply
Country/Region of Manufacture:China
UPC:Does not apply
eBay This Power supply Circuit base on the famous sigma11 circuit. Stable voltage, ultra-low noise, ultra-low ripple. very suitable for updates all kind audio device Power supply. Works voltage: AC115V or AC230V for choose. (we also can custom-make AC100V) Output voltage: DC12V 3A and DC12V 3A (we also can custom-make other voltage. if you need. Please contact us) Front panel color: Default is Black if you need Silver front. Please contact us to confirm whether have in stock. Dimensions: 245mm Width X 70mm high X 258mm deep Transformer : 2pcs 50VA OFC Toroid transformer Weight: about 5kg DC Head Size: Outer diameter 5.5mm, internal diameter 2.5mm (it will also compatible with 5.5*2.1mm socket. if you need other Size DC head, Please contact us) Power Polarity: inner”+” external”-” Package include: Linear Power supply X 1 0.8M length DC cable X 2pcs Note: Default is no AC power cable included!!! Technical highlights All-discrete topology. Single-pass, series regulator design. No IC (integrated circuits) are used. This allows complete design control over all operating points and parameters for superior performance. 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. This is an effective yet lower-cost alternative to expensive voltage reference ICs. The low-pass filter also provides a soft-start characteristic. The output noise (unloaded) is less than 13µV at 24VDC output (measured using a Tangent LNMP (low-noise measurement preamplifier) and a Fluke 187 50000-count DMM in ACmV mode). The output noise is even less when the output voltage is lower. This is much better than the noise of an IC regulator based PSU tested under identical conditions. 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). This greatly improves the line regulation performance of the PSU. 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. High-current MOSFET pass transistors Two paralleled high-current, highly reliable MOSFETs (rated at 18A each) serve as the “pass” transistor. The high current rating provides a very high safety headroom against overcurrent damage. The use of paralleled MOSFETs divides the heat dissipation, simplifying thermal management. Onboard heatsinks can be used which would allow the this PSU to supply up to 1A 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. Shipping time: Default send by airmail,about 8-14 business days can arrive most of europe countries, Russia, Brazil,Africa.Ukraine and some other remote countries will need some more days. Payment: We ONLY accept PayPal. Payment must be made within 3 days of the auction end time. Non-Paying bidders will be reported. All items will be shipped within 1-3 business days (from china)upon receipt of payment. We ONLY send item to buyer’s registered Paypal address,Buyer must be responsible for their postal address Customs & duties:For cross-border transactions,.we are not responsible for tariffs and duties. However, buyers may be responsible for actual, applicable tariffs, and duties as requested by respective country laws Return & Exchange: >> Some items return is accepted within 7 days after the buyer’s receiving the item.(please see the detail describe)[In case of DOA (Dead on Arrival), please report within 3 days] >> Returned item has to be new, unworn and in its original condition. >> After getting the returned item, we will refund the customer at the item’s price ( excluding the shipping costs to and from )
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