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New Class D Ultra Wide Bandwidth Voltage Regulator
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The UWB Regulator is a high end replacement to 78XX and 79XX regulators found in CD / DVD players and other audio equipment, with positive and negative versions available 3.3Vdc, 5Vdc, 9Vdc, 12Vdc and 15Vdc.
The output of the 7805 regulator is often used as a reference voltage for the DAC, or other noise sensitive sections of the audio equipment, like the OPAmps. Unfortunately normal 7805 regulators have a very poor noise performance. Especially if there are external noise sources around the 7805 regulator, like ripple or load fluctuations. In case a fluctuating load is connected to the 7805, or 100 Hz ripple is present on the input of the 7805, the S/N ratio of the 7805 drops down below acceptable level for Audio purposes. In this case you can greatly benefit from a regulator with a good ripple rejection, but even more importantly, a regulator with a wide bandwidth loop, that can remain stable under fluctuating loads.
The UWB regulator replaces the 7805 (or other 78XX / 79XX regulator) as a cheap and simple upgrade of your Audio Player, and has more than 100 times better ripple rejection, 10 times lower noise, and no line and load regulation error. It is discretely made on a circuit board, of roughly the same size as the 78XX / 79XX regulator. This way a regulator can be constructed with better performance than any known IC regulator on the market.
78XX is the positive voltage regulator, while .. 79XX is the negative voltage regulator. Be sure to get the right one.
Technical Specs:
Output Voltages: 3.3, 5, 8, 9, 12, 15V dc.
Input Voltage (max): 25V dc.
Dropout Voltage: 2.00V (Equivalent to 78XX series).
Maximum Current DX78xx: 630mA.
Maximum Current DX79xx: 400mA.
Ripple Rejection: >100dB.
Line Rejection: unmeasurable.
Load Regulation: < 5mV 0-max load.
Price for 1 off = £24.75 + VAT + Shipping
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 code: NC_REG****
Installation: (SIMPLE PROCEDURE)
Remove the 78XX regulator.
Mount the UWB regulator in it's place.
If the 78XX regulator was mounted on a heat sink, you should also mount the UWB regulator on the same heat sink. If no heat sink is used in the player, you also don't have to use one with the UWB regulator.
Important! Use the isolator pad (supplied) when mounting the UWB on a heat sink.
No considerations are necessary with regards to the input / output capacitors on the regulator. The UWB regulator does not need any capacitors on input or on the output. But it will tolerate any normal size cap on both inputs and outputs.
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New Class D Ultra Wide Bandwidth Voltage Regulator Test Results
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Test: Noise rejection, 12VDC + 1 Vrms 100 Hz ripple. Device under test- standard 7805 regulator. |
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Test: Noise rejection, 12VDC + 1 Vrms 100 Hz ripple. Device under test- NewClassD UWB regulator. |
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Test: SMPS Noise rejection.
Typical application environment in a DVD player with a switched mode power supply. A commercial soap bar SMPS 12V 1A was used to feed both regulators, and the output looked like this for the standard 7805. |
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Test: SMPS Noise rejection.
Typical application environment in a DVD player with a switched mode power supply. A commercial soap bar SMPS 12V 1A was used to feed both regulators, and the output looked like this for the NewClassD UWB regulator. |
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Test: 10kHz Sine Wave load. Device under test- standard 7805 regulator. |
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Test: 10kHz Sine Wave load. Device under test- NewClassD UWB regulator. |
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Test: 1kHz Square Wave Load. (Wideband Load Noise).Device under test- standard 7805 regulator. |
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Test: 1kHz Square Wave Load. (Wideband Load Noise). Device under test- NewClassD UWB regulator. |
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