MP38CLA

MP38 • MP38A Power Operational Amplifier RoHS COMPLIANT FEATURES • • • • • High Internal Dissipation — 125W High Voltage, High Current — 200V, 10A High Slew Rate — 10V/µs 4 Wire Current Limit Sensing Optional Boost Voltage Inputs APPLICATIONS • • • • Linear and Rotary Motor Drives Yoke/Magnetic Field Excitation Programmable Power Supplies to ±95V Industrial Audio DESCRIPTION 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 125W and its power supply voltages can range up to ±100V (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. www.apexanalog.com © Apex Microtechnology Inc. All rights reserved Mar 2016 MP38U Rev L MP38 • MP38A Figure 1: Equiv Schematic 12 +Vs +Vb 1 C1 13 +Vs C2 Q1A GND 2 14 +Vs Q1B Q4 Q2 D1 Q3 Cc2 4 Q7 Cc1 6 -IN 30 24 +Ilim Q6 Q5 23 -Ilim 15 OUT Q10 Q11B 16 OUT Q11A 17 OUT +IN 29 Q12 Iq 25 Q13 GND 28 Q14 18 -Vs Q15 C3 19 -Vs -Vb 26 20 -Vs TYPICAL CONNECTION Figure 2: Typical Connection RF +VS +VB 10μF 1μF 1μF RI +VS -IN +IN -VS +VB -CL MP38 -VB CC IQ CC +CL OUT RC RCL VOUT RL RC NC 10μF 2 1μF -VS -VB 1μF MP38U Rev L MP38 • MP38A PINOUT AND DESCRIPTION TABLE Figure 3: External Connections -IN 30 +IN 29 GND 28 NC 27 1 2 3 4 +VB GND NC 5 CC2 NC 6 CC1 7 NC 8 9 NC NC 10 NC 11 NC 12 +VS 13 14 -VB 26 IQ 25 MP38 (back view) +CL 24 -CL 23 NC 22 NC 21 -VS 20 -V 19 S -VS 18 OUT 17 16 OUT OUT 15 +VS +VS Pin Number Name Description 1 +VB The positive boost supply rail. Short to +Vs if unused. See applicable section. 2, 28 GND Ground. Pins 2 and 28 are not connected on the unit. Connect both pins to system signal ground. 4 CC Compensation capacitor connection. Select value based on Phase Compensation. See applicable section. 6 RC Compensation resistor connection. Select value based on Phase Compensation. See applicable section. 12, 13, 14 +Vs The positive supply rail. 15, 16, 17 OUT The output. Connect these pins to load and to the feedback resistor. 18, 19, 20 -Vs The negative supply rail. 23 -CL Connect to the load side of the current limit resistor. Current limit will activate as the voltage across RCL increases. 24 +CL Connect to the OUT side of the current limit resistor. Current limit will activate as the voltage across RCL increases. 25 IQ Quiescent current reduction pin. Connect to pin 6 to disable the AB bias. See applicable section. 26 -VB The negative boost supply rail. Short to -Vs if unused. See applicable section. 29 +IN The non-inverting input. 30 -IN The inverting input. All Others NC No connection. MP38U Rev L 3 MP38 • MP38A SPECIFICATIONS Unless otherwise noted: TC = 25°C, RC = 100 Ω, CC = 470pF. DC input specifications are ± value given. Power supply voltage is typical rating. ±VB = ±VS. ABSOLUTE MAXIMUM RATINGS Parameter Symbol Max Units +Vs to -Vs 200 V Boost Voltage VB ±VS ±20 V Output Current, within SOA IO 25 A Power Dissipation, internal PD 125 W Input Voltage, differential VIN (Diff) -20 +20 V Vcm -VB +VB V 200 °C 175 °C -40 +105 °C -40 +85 °C Supply Voltage, total Input Voltage, common mode Min Temperature, pin solder, 10s max. Temperature, junction 1 TJ Temperature Range, storage TC Operating Temperature Range, case 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet. CAUTION The MP38 is constructed from MOSFET transistors. ESD handling procedures must be observed. INPUT Parameter Test Conditions MP38 Min Offset Voltage, initial Offset Voltage vs. temperature Full temp range Offset Voltage vs. supply Offset Voltage vs. power Full temp range Bias Current, initial Typ Max 5 30 Min Units Typ Max 10 * 3 mV 50 * * µV/°C 15 * µV/V 30 * µV/W 10 Bias Current vs. supply MP38A 200 * 0.01 100 * * pA/V Offset Current, initial 10 Input Impedance, DC 1010 * Ω 20 * pF Input Capacitance 50 pA 30 pA Common Mode Voltage Range Full temp range ±VB∓15 ±VB∓12 * * V Common Mode Rejection, DC Full temp range, VCM= ±20V * * dB Input Noise 100 kHz BW, RS = 1 kΩ * µVrms 4 86 98 10 MP38U Rev L MP38 • MP38A GAIN Parameter Test Conditions MP38 Min Typ 94 113 MP38A Max Max Units Min Typ * * dB Open Loop @ 15 Hz Full temp range, CC = 100pF Gain Bandwidth Product I O = 10A 2 * MHz Power Bandwidth RL = 20 Ω, VO = 180VP-P CC = 100pF 20 * kHz Phase Margin Full temp range 60 * ° Test Conditions MP38 MP38A OUTPUT Parameter Min Typ Max ±VS∓8.8 ±VS∓6.6 Max Units Min Typ * * V * * V * µs Voltage Swing I O = 10A Voltage Swing ±VB = ±VS ±10V, ±VS∓6.8 ±VS∓4 I O = 10A Settling Time To 0.1% A V = +1,10V step, R L = 4 Ω Slew Rate A V = –10, CC = 100pF 10 * V/µs Capacitive Load Full temp range, A V = +1 10 * nF 2.5 Resistance 4 Current, Continuous * 10 Ω 11 A POWER SUPPLY Parameter Voltage MP38 MP38A Test Conditions Min Typ Max Min Typ Max Full temp range ±15 ±75 ±100 * * * Units V Current, quiescent, boost supply 22 * mA Current, quiescent, total 26 * mA MP38U Rev L 5 MP38 • MP38A THERMAL Parameter Test Conditions MP38 Min Typ MP38A Max Min Typ Max Units Resistance, AC, junction to case 1 Full temp range, F>60 Hz 0.9 * °C/W Resistance, DC, junction to case Full temp range, F