MP39CL

MP39 • MP39A Power Operational Amplifier RoHS COMPLIANT FEATURES • • • • • High Internal Dissipation — 125 Watts High Voltage, High Current — 100V, 10A 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 ±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 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 MP39U Rev K MP39 • MP39A Figure 1: Equivalent Schematic 12 +Vs +Vb 1 R1 R2 Q1A Q1B C1 GND 2 13 +Vs C2 R3 14 +Vs Q5 Q3 D1 R4 Q4 Cc2 4 Q9 Cc1 6 Q7 Q6 -IN 30 +IN 29 24 +Ilim R5 23 -Ilim Q10B Q10A R6 R8 15 OUT Q8 16 OUT R9 R7 17 OUT R10 Q11 Iq 25 R11 Q12 GND 28 Q13 Q14 R12 R13 18 -Vs C3 19 -Vs 20 -Vs -Vb 26 TYPICAL CONNECTION Figure 2: Typical Connection RF +VS +VB 10μF 1μF 1μF RI +VS -IN +IN -VS +VB -CL MP39 -VB CC IQ CC +CL OUT RC RCL VOUT RL RC NC 10μF 2 1μF -VS -VB 1μF MP39U Rev K MP39 • MP39A PINOUT AND DESCRIPTION TABLE Figure 3: External Connections 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. MP39U Rev K 3 MP39 • MP39A 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 Supply Voltage, +Vs To -Vs Min +Vs to -Vs Boost Voltage Max Units 100 V ±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 Input Voltage, common mode Temperature, pin solder, -10s Temperature, junction 1 TJ Temperature, 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 MP39 is constructed from MOSFET transistors. ESD handling procedures must be observed. INPUT Parameter Test Conditions MP39 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 10 Min Typ Max Units * 3 mV 50 * µV/°C 15 * µV/V 30 * µV/W 10 Bias Current vs. Supply MP39A 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 * µV RMS 4 86 98 10 MP39U Rev K MP39 • MP39A GAIN Parameter Test Conditions MP39 Min Typ 94 113 MP39A Max Min Typ Max Units * * dB Open Loop, @ 15Hz Full temp range, CC = 100pF Gain Bandwidth Product IO = 10A 2 * MHz Power Bandwidth RL=10 Ω, VO = 90VP-P CC = 100pF 40 * kHz Phase Margin Full temp range 60 * ° Test Conditions MP39 MP39A OUTPUT Parameter Min Typ Max Min Typ Max Units Voltage Swing I O=10A ±VS∓8.8 ±VS∓6.0 * * V Voltage Swing ±VB = ±VS ±10V, ±VS∓6.8 ±VS∓1.1 I O=10A * * V Settling Time to 0.1% A V=+1,10V step, R L =4 Ω * µs 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 MP39 MP39A Test Conditions Min Typ Max Min Typ Max Units Full temp range ±15 ±40 ±50 * * * V Current, quiescent, boost supply 22 * mA Current, quiescent, total 26 * mA MP39U Rev K 5 MP39 • MP39A THERMAL Parameter Test Conditions Resistance, AC, junction to case 1 Full temp range, F>60 Hz Resistance, DC, junction to case Full temp range, FK 30 20 10 1 1k 10k 100k 1M Frequency (Hz) 0 100 200 300 400 500 džƚŽŵƉĞŶƐĂƟŽŶĂƉĂĐŝƚŽƌ;Ɖ&Ϳ Figure 10: Output Voltage Swing 9 Output Voltage Drop From Supply, VS - VO (V) 8 7 +V B = 6 +V S -V S = -V B 5 0V 4 VS 3 -V B =- -1 V = +V S +V B 2 + 10 1 0 0 2 4 6 8 10 Output Current, IO (A) 8 MP39U Rev K MP39 • MP39A SAFE OPERATING AREA (SOA) 100 KƵƚƉƵƚƵƌƌĞŶƚ͕/O (A) 10ms 1ms 10 125°C 1 85°C 25°C 0.1 1 10 100 ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕VS-VO (V) MP39U Rev K 9 MP39 • MP39A GENERAL Please read Application Note 1 “General Operating Considerations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. CURRENT LIMIT The two current limit sense lines are to be connected directly across the current limit sense resistor. For the current limit to work correctly pin 24 must be connected to the amplifier output side and pin 23 connected to the load side of the current limit resistor, RLIM, as shown in Figure 11. This connection will bypass any parasitic resistances, Rp, formed by sockets and solder joints as well as internal amplifier losses. The current limiting resistor may not be placed anywhere in the output circuit except where shown in Figure 11. The value of the current limit resistor can be calculated as follows: 0.7V R LIM    = -----------------------I LIMIT  A  Figure 11: Current Limit TYPICAL APPLICATION Ref: Application Note 25 The high power bandwidth and high voltage output of the MP39 allows driving ultra-sonic transducers via a resonant circuit including the transducer and a matching transformer. The load circuit appears resistive to the MP39. 10 MP39U Rev K MP39 • MP39A Figure 12: Typical Application BOOST OPERATION With the VB feature the small signal stages of the amplifier are operated at higher supply voltages than the amplifier's high current output stage. +VS (pins 12-14) and –VS (pins 18-20) are connected to the high current output stage. An additional 10V on the VB pins is sufficient to allow the small signal stages to drive the output transistors into saturation and improve the output voltage swing for extra efficient operation when required. When close swing to the supply rails is not required the +VB and +VS pins must be strapped together as well as the –VB and –VS pins. The boost voltage pins must not be at a voltage lower than the VS pins. BYPASSING Proper bypassing of the power supply pins is crucial for proper operation. Bypass the ±Vs pins with a aluminum electrolytic capacitor with a value of at least 10µF per amp of expected output current. In addition a 0.47µF to 1µF ceramic capacitor should be placed in parallel with each aluminum electrolytic capacitor. Both of these capacitors have to be placed as close to the power supply pins as physically possible. If not connected to the Vs pins (See BOOST OPERATION) the VB pins should also be bypassed with a .47µF to 1µF ceramic capacitor. USING THE IQ PIN FUNCTION Pin 25 (Iq) can be tied to pin 6 (Cc) to eliminate the class AB biasing current from the output stage. Typically this would remove 1-4 mA of quiescent current. The resulting decrease in quiescent power dissipation may be important in some applications. Note that implementing this option will raise the output impedance of the amplifier and increase crossover distortion as well. MP39U Rev K 11 MP39 • MP39A COMPENSATION The external compensation components CC and RC are connected to pins 4 and 6. Unity gain stability can be achieved at any compensation capacitance greater than 470 pF with at least 60 degrees of phase margin. At higher gains more phase shift can be tolerated in most designs and the compensation capacitance can accordingly be reduced, resulting in higher bandwidth and slew rate. Gain CC RC 1 470pF 100Ω ≥3 220pF Short ≥10 100pF Short APPLICATION REFERENCES For additional technical information please refer to the following application notes. AN01 General Operating Considerations AN11 Thermal Techniques AN38 Loop Stability with Reactive Loads 12 MP39U Rev K MP39 • MP39A PACKAGE OPTIONS Part Number Apex Package Style Description MP39 CL 30-pin Open Frame MP39A CL 30-pin Open Frame PACKAGE STYLE CL MP39U Rev K 13 MP39 • MP39A NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnology, Inc. All other corporate names noted herein may be trademarks of their respective holders. 14 MP39U Rev K