MP39CLA Apex Microtechnology

MP39 MP39A RoHS Power Operational Amplifier COMPLIANT FEATURES High Internal Dissipation 125 Watts High Voltage, High Current 100V, 10A Slew Rate 10V/s 4 Wire Current Limit Sensing Optional Boost Voltage Inputs APPLICATIONS Linear And Rotary Motor Drives Yoke/Magnetic Field Excitation Programmable Power Supplies to 45V Industrial Audio DESCRIPTION The MP39 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 MP39 offers many of the same features and performance specifications found in much more expensive hybrid power amplifiers. The metal substrate allows the MP39 to dissipate power up to 125 watts and its power supply voltages can range up to +/- 50 Volts (100V 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 com- pensation 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. Apex Microtechnology Inc. Mar 2016 www.apexanalog.com All rights reserved MP39U Rev KMP39 MP39A Figure 1: Equivalent Schematic +Vs +Vb 1 12 +Vs R2 13 R1 C1 C2 R3 14 +Vs Q1A Q1B 2 GND Q5 Q3 D1 R4 Q4 Cc2 4 Cc1 6 Q9 24 +Ilim Q7 Q6 23 -Ilim R8 15 OUT Q8 R5 Q10B 30 -IN 16 OUT Q10A R9 R6 R7 17 OUT R10 +IN 29 Q11 Iq 25 R11 Q12 GND 28 Q13 18 -Vs Q14 C3 -Vs 19 R12 R13 -Vs -Vb 26 20 TYPICAL CONNECTION Figure 2: Typical Connection R F +V +V S B 1F 10F 1F R +V I S +V B V -CL OUT -IN R CL +CL OUT MP39 R C +IN C R C L I Q -V B C C -V S R C NC 10F 1F 1F -V -V S B 2 MP39U Rev K