Product Details:
1:) OPA445 pushes three segment emitter circuit output.
2:) Taiwan Copper Foot Metal Film Resistors, Imported Electrolytic Capacitors, and Precise Pairing of Transistors.
3:) After pairing with copper leg transistors, the amplification factor is high.
4:) When installing and debugging, do not directly power on first. Connect a high-power resistor (5W or more) of about 100 ohms in series with the positive and negative power supply wires. Only cancel the resistor power on after testing that the working points of each circuit are normal. Try to reduce the final current as much as possible, and only increase it after confirming that it is normal.
5:) The working current of the output stage can be measured by the cement resistance of the output stage, and the current can be calculated according to Ohm's law. For example, if the resistance is 0.25 ohms and the voltage is 10MV, the working current is approximately 0.01/0.25=0.04A. Generally, the output stage can work with a few milliamps or more. The larger the current, the closer it is to Class A..
6:) The power amplifier board only needs to adjust the current of the final transistor through the blue adjustable resistor on the board.
7:) Heat dissipation treatment should be done before powering on.
Specifications:
Input voltage: double AC18V-40V（Recommended AC dual 28V）
Output voltage: DC 16V/1.8A(Transformer power ranging from 100 watts to 500 watts).
Output power: 100W*2
Frequency response: 10HZ-100KHz
Size: 10-20cm
Weight: about 0.5KG
Package List:
1 × OPA445 Amplifier board
