Taidacent OPA549 Audio Power Amplifier 8A Current High Voltage High Current Op Amp with Excellent Output Swing
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Name: OPA549 Audio Power Amplifier Size: 86mm*81mm*52mm Supply voltage range: ±10V~±30V
High-voltage, high-current audio power amplifiers can continuously output 8A with a maximum peak value of 10A, ideal for driving various loads such as motor drives, speaker drivers, transformer drivers, and audio amplifiers.
OPA549's design flexibility supports single-supply or dual-source operation. The input common-mode range extends him below the negative supply.The OPA549 has internal temperature and current overload protection.
Chip features High output current: 8a continuous/10a peak Wide Supply Range: Single Supply: +8V to +60V Wide output voltage swing Full protection: thermal shutdown/adjustable current limit Output cannot be controlled Thermal shutdown indicator High conversion rate: 9V/us Control reference pin 11-lead power package Dual Supply: ±4V to ±30V
Chip application Valve, drive drive Synchronous servo drive power supply Test equipment Transducer excitation Audio power amplifier
Module interface diagram
Precautions for module use
(1) The power consumption of the module is large, and the power supply needs to have a certain margin. It is recommended to use a power supply with a current drive capacity greater than 2 times the required output current. The module can only be powered by dual power supplies.
(2) In order to avoid unnecessary interference, it is recommended to use linear power supply, and the power supply cannot exceed plus or minus 35V.
(3) It is recommended to use the SMA to BNC cable for the output signal to observe the effect directly with the oscilloscope. Poor contact or poor quality cable may cause signal attenuation or excessive noise.
(4) SMA port is not available for power output, blue terminal block must be used. The SMA port is for observing the signal and cannot be overpowered.
(5) Due to the high power consumption and heat generation, pay attention to ventilation and heat dissipation when working for a long time, and increase the fan to strengthen heat dissipation when necessary.
(6) Since the module has a fixed magnification and no external protection circuit, it is recommended to confirm the output power and amplitude before loading to avoid damage to the module.
Module test diagram
Q: Is the magnification fixed? How to adjust it?
A: The default magnification of the module is 33 times. If you need to adjust the magnification, you can only change the resistance on the board. The resistance package is 0805. The calculation formula has been given in the parameter details.
Q: Can the module directly drive the coil?
A: The module can drive the coil, but the internal resistance of the coil is required to be greater than 4Ω. If it is less than 4Ω, a power resistor must be connected in series, otherwise the module may be damaged.
Q: Can the module amplify square waves or pulses? What is the bandwidth of the module?
A: The module can amplify low-frequency square waves or pulses. Because it is an audio amplifier, the total bandwidth is not high. Signals within 100K can be amplified. The module is compatible with DC input.
Q: Can the module amplify 1:1? That is, only amplify current?
A: The module can support 1:1 amplification. You need to modify the resistance configuration magnification by yourself. It is not recommended to directly configure to the op amp follower mode, which is easy to self-excite. It is recommended to change to resistance attenuation first, and then operational amplification. The total gain is 1. OK.
Q: Why is the input sine wave output as a square wave? What is the output current? What is the output power?
A: Generally speaking, if the input signal is too large, the operational amplifier will be amplified with cut-off distortion, which is a square wave, or the power supply voltage is not enough. It can be solved by reducing the input signal and increasing the supply voltage. The output current of the module is determined by the output voltage and load, 1=Uout/R, the same is true, the output power P=U*), which is also determined by the output voltage and load resistance, heat dissipation silicone grease and air cooling can be added for high power input.
Q: Can I use the second stage directly without the previous stage?
A: You can only use the second level, but you need to remove the first level chip, and then input the signal from OUT1. Otherwise, the first-level chip will affect the signal input.
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