This link is a commonly used 3-channel DC voltage regulator circuit for HiFi DIY, which is divided into two versions: LT1963A version and op amp + field effect tube. Both of them are independent input and independent output.
Tips: Because the two versions of the power board have different requirements for transformer windings, input voltage, and voltage levels, the detailed description may not be exhaustive. If you are interested, you can consult customer service for details. Improper use or wrong wiring may result in burnout of the transformer and power supply board.
Using 3 completely independent LT1963 voltage regulator circuits, it can be set as 3 positive power supplies, or 1 positive power supply, 1 positive and negative dual power supply. The maximum output current of a single channel is 1.5A, the input can be DC and AC, and the output voltage range is 1.21V to 20V. LT1963 is a high-speed low-noise integrated voltage regulator chip, its index is much higher than ordinary voltage regulator devices such as LM317 LT317 ASM1117. It is commonly used on advanced DACs such as ES9018S to polish the power supply of the DAC to make the background details better.
PCB size: 10cm * 7cm
Input voltage: 3 AC AC6~15V, also can directly input DC6~20V
Output voltage: 1.2V-20V (adjustable), can be used as 3 positive power supplies, or 1 positive power supply, 1 positive and negative dual power supply.
Output current: 1.5A (max)
For this power supply board, when it needs to be set as a positive and negative power supply, the AC input terminal must be a 4-wire two independent windings, not a 3-wire center tap.
Using high-speed op amp OP plus MOS field tube output architecture, the op amp adopts the new and original high-precision op amp OP07, the field tube adopts the new and original Infineon IRF9Z34 IRFZ34, etc., the output voltage is stable and the ripple is low, and the response speed is fast, which is very suitable Provide power to the DAC board.
PCB size: 10cm * 8cm
Input voltage: 3 AC AC6~18V
Output voltage: plus or minus 5~15V (adjustable), +5V~15V (adjustable)
Output current: MAX 3A
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