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The MP38 is a cost-effective high voltage MOSFET power operational amplifier constructed with surface mount components on a thermally conductive but electrically isolated substrate. While the cost is low the MP38 offers many of the same features and performance specifications found in much more expensive hybrid power amplifiers. The metal substrate allows the MP38 to dissipate power up to 125 watts and its power supply voltages can range up to ± 100 Volts (200V total). Optional boost voltage inputs allow the small signal portion of the amplifier to operate at higher supply voltages than the high current output stage. The amplifier is then biased to achieve close linear swings to the supply rails at high current for extra efficient operation. External compensation tailors performance to the user needs. A four-wire sense technique allows current limiting without the need to consider internal or external mili-ohm parasitic resistance in the output line. An Iq pin is available which can be used to shut off the quiescent current in the output stage. The output stage then operates class C and lowers quiescent power dissipation. This is useful in applications where output crossover distortion is not important. The MP38A is the A grade version. Applications:
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| Output Current MAX (A) | Supply Voltage MAX (V) | Slew Rate TYP (V/µs) | Standby Current MAX (mA) | Power Dissipation MAX (W) |
|---|---|---|---|---|
| MP38 | ||||
| 7 | 200 | 63 | 24 | 125 |
| MP38A | ||||
| 8 | 200 | 63 | 24 | 125 |
The MP38 is a cost-effective high voltage MOSFET power operational amplifier constructed with surface mount components on a thermally conductive but electrically isolated substrate. While the cost is low the MP38 offers many of the same features and performance specifications found in much more expensive hybrid power amplifiers.
The metal substrate allows the MP38 to dissipate power up to 125 watts and its power supply voltages can range up to ± 100 Volts (200V total). Optional boost voltage inputs allow the small signal portion of the amplifier to operate at higher supply voltages than the high current output stage. The amplifier is then biased to achieve close linear swings to the supply rails at high current for extra efficient operation. External compensation tailors performance to the user needs. A four-wire sense technique allows current limiting without the need to consider internal or external mili-ohm parasitic resistance in the output line. An Iq pin is available which can be used to shut off the quiescent current in the output stage. The output stage then operates class C and lowers quiescent power dissipation. This is useful in applications where output crossover distortion is not important.
The MP38A is the A grade version.
Applications:
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