100VA Low Noise R-core Transformer DC Linear Power Supply for audio system DC5V DC6V DC9V DC12V DC15V DC18V DC19V DC20V DC24V DC28V DC32V for choose

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$145.00

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Works voltage:

115V

230V
Front panel color:

Black Front panel

Silver front panel
Output Voltage:

DC5V

DC6V

DC9V

DC12V

DC15V

DC16V

DC18V

DC19V

DC20V

DC24V

DC28V

DC32V

Other voltage

Quantity

Description

work voltage: AC115V or AC230V for choose

Front panel: Black or Silver for choose

Output voltage: (we have following kinds for choose)
1: DC5V    6A
2: DC6V    6A
3: DC9V    6A
4: DC12V   6A
5: DC15V   5A
6: DC16V   5A
7: DC18V   4.5A
8: DC19V    4.3A
9: DC20V    4A
10: DC24V   3.5A
11: DC28V   3A
12: DC32V   2.5A

we also can custom-make other Less 36V voltage. if the option is not have you needs voltage. you can choose"Other voltage" then send message to tell us the voltage that you need.

Dimensions: 210mm Width X 70mm high X 257mm deep

DC Head Size: Outer diameter 5.5mm, internal diameter 2.5mm ( compatible with 5.5*2.1mm socket. or if you need other size plug. Please contact us.)

Power Polarity: inner"+" external"-"

Main materials:

1: 100VA oxygen-free copper R-type transformer
2: Nichicon 10000uf/50V main filter capacitor
3: Built-in EMI filter board
4: Gold-plated AC input socket
5: All aluminum chassis

Package include:
                                      linear Power supply X 1

                                     1.2M Teflon silver wire output DC cable X 1 (5.5*2.5mm)

Default is not include the AC input cable.

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.