PA92EE

PA92 High Voltage Power Operational Amplifiers RoHS COMPLIANT FEATURES • • • • High Voltage — 400V (±200V) Low Quiescent Current — 10mA High Output Current — 4A Programmable Current Limit APPLICATIONS • • • • Piezoelectric Positioning High Voltage Instrumentation Electrostatic Transducers Programmable Power Supplies up to 390V DESCRIPTION The PA92 is a high voltage, low quiescent current MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to 4A and pulse currents up to 7A. The safe operating area (SOA) has no second breakdown limitations and can be observed for all type loads by choosing an appropriate current limiting resistor. The MOSFET output stage is biased AB for linear operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. Apex Microtechnology’s Power SIP uses a minimum of board space allowing for high density circuit boards. The Power SIP is electrically isolated. Figure 1: Equivalent Schematic 12 11 +VS R1 R2 Q1 C1 Q5 Q14A R4 Q4 ICL 9 5 4 CC2 CC1 Q14B 1 –IN R5 Q8 R7 R9 Q12 6 OUT Q13 3 IQ 2 +IN Q15 R11 10 Q11 R6 R8 www.apexanalog.com Q3 Q2 Q6 –VS 7 8 R3 R10 Q17 Q16 R12 © Apex Microtechnology Inc. All rights reserved Oct 2020 PA92U Rev V PA92 TYPICAL CONNECTION Figure 2: Typical Connection RF +VS * 100 k 100nF RC CC RF +VS + CC1 1k PA92 VOUT CC2 CL -VS RCL *Bulk Bypass Capacitors. Use 10μF per Amp of Output Current. - VS 100nF * ** 2 RL * * Connect in one point PA92U Rev V PA92 PINOUT AND DESCRIPTION TABLE Figure 3: External Connections Pin Number Name Description 1 2 -IN +IN 3 IQ 4 CC1 5 CC2 6 7, 8 OUT -VS 9, 10 CL 11, 12 +VS The inverting input. The non-inverting input. Quiescent current reduction pin. Connect to pin 5 to disable the AB bias. See applicable section. Compensation resistor connection. Select value based on Phase Compensation. See applicable section. Compensation capacitor connection. Select value based on Phase Compensation. See applicable section. The output. Connect this pin to load and to the feedback resistors. The negative supply rail. Pins 7 and 8 are internally connected. Connect to the current limit resistor. Output current flows into/out of these pins through RCL. The output pin and the load are connected to the other side of RCL. Pins 9 and 10 are internally connected. The positive supply rail. Pins 11 and 12 are internally connected. PA92U Rev V 3 PA92 SPECIFICATIONS All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical performance characteristics and specifications are derived from measurements taken at typical supply voltages and TC = 25°C. ABSOLUTE MAXIMUM RATINGS Parameter Symbol Supply Voltage, total Output Current, source, sink, peak, within SOA Power Dissipation, continuous @ Tc = 25°C Input Voltage, differential Input Voltage, common mode Min Max Units +VS to -VS 400 V IOUT 7 A PD 80 W VIN (Diff) -20 20 V VCM -VS +VS V 260 °C 150 °C -55 +125 °C -40 +85 °C Temperature, pin solder, 10s max. Temperature, junction Temperature Range, storage TJ Operating Temperature Range, case TC 1 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. CAUTION The PA92 is constructed from MOSFET transistors. ESD handling procedures must be observed. The substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. INPUT Parameter Offset Voltage, initial Offset Voltage vs. Temperature Offset Voltage vs. Supply Offset Voltage vs. Time Bias Current, initial Bias Current vs. Supply Offset Current, initial Test Conditions Min Full temp range Input Impedance, DC Input Capacitance Typ Max Units 2 15 10 75 200 4 50 10 50 25 mV µV/°C µV/V µV/kh pA pA/V pA Common Mode Rejection, DC VCM = ±90V Noise 100 kHz BW, RS = 1 kΩ, CC = 10pF 80 500 1011 Ω 4 pF ±VS Ŧ 15 Common Mode Voltage Range 1 2000 V 98 dB 1 µV RMS 1. +VS and –VS denote the positive and negative power supply rail respectively. 4 PA92U Rev V PA92 GAIN Parameter Min Typ 94 111 dB Gain Bandwidth Product @ 1 MHz RL = 2 kΩ, CC = 10pF 18 MHz Power Bandwidth RL = 2 kΩ, CC = 10pF 30 kHz Phase Margin Full temp range 60 ° Open Loop @ 15 Hz Test Conditions RL = 2 kΩ, CC = 10pF Max Units OUTPUT Parameter Voltage Swing 1 Test Conditions IOUT = 4A Current, continuous Slew Rate, A V = 100 Min Typ ±VS Ŧ 12 ±VS Ŧ 10 Max V 4 CC = 10pF Capacitive Load, A V = +1 Full temp range Settling Time to 0.1% CC = 10pF, 2V step A 50 V/µs 1 Resistance, no load Units nF 1 µs 10 Ω 1. +VS and –VS denote the positive and negative power supply rail respectively. POWER SUPPLY Parameter Test Conditions Min Typ Max Units ±50 ±150 ±200 V 10 14 mA Max Units Full temp range, F > 60 Hz 1 °C/W Full temp range, F < 60 Hz Full temp range Meets full range specs 1.5 °C/W °C/W °C Voltage 1 Current, quiescent 1. Derate max supply rating 0.625 V/°C below 25°C case. No derating needed above 25°C case. THERMAL Parameter Resistance, AC, junction to case 1 Resistance, DC, junction to case Resistance, junction to air temperature range, case Test Conditions Min Typ 30 -25 +85 1. Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz. PA92U Rev V 5 PA92 TYPICAL PERFORMANCE GRAPHS Figure 4: Power Derating Figure 5: Normalized Quiescent Current 1.6 Normalized Quiescent Current, IQ (X) /ŶƚĞƌŶĂůWŽǁĞƌŝƐƐŝƉĂƟŽŶ͕W;t) 80 60 40 20 25 50 75 100 1.2 1.0 25 0 0 1.4 125 Figure 6: Small Signal Response 125 90 CC = 150pF CC = 100pF CC = 47pF CC = 10pF 40 30 135 Phase, ˇ;ΣͿ Open Loop Gain, A (dB) 100 Figure 7: Phase Response 50 20 10 180 225 0 1M Frequency, F (Hz) 6 75 Case Temperature, TC (°C) Case Temperature, TC (°C) -10 100k 50 10M 270 100k CC = 150pF CC = 100pF CC = 47pF CC = 10pF 1M 10M Frequency, F (Hz) PA92U Rev V PA92 Figure 9: Power Response 400 8.5 Output Voltage Swing, VOUT (VP-P) Voltage Drop From Supply VS- VOUT (V) Figure 8: Output Voltage Swing 8.0 7.5 7.0 100 CC = 10pF CC = 47pF CC = 100pF CC = 150pF 10 1k 6.5 0 1 2 3 4 10k 1M Frequency, F (Hz) Output Current, IOUT (A) Figure 10: Slew Rate Figure 11: Harmonic Distortion 0.1 60 PO = 1W PO = 20W PO = 62W 40 30 ŝƐƚŽƌƟŽŶ;йͿ 20 Slew Rate ;sͬʅƐͿ 100k 10 8 6 4 3 0.01 2 0.001 1 10 30 60 100 200 300 džƚ͘ŽŵƉĞŶƐĂƟŽŶĂƉĂĐŝƚŽƌ͕C (pF) PA92U Rev V 100 1k 10k Frequency, F (Hz) 7 PA92 Figure 12: Input Noise Voltage Figure 13: Current Limit 4 15 Current Limit, ICL (A) Input Noise Voltage, V ;Ŷsͬя,njͿ 20 10 7 5 2 1 3 2 10 0 100 1k 10k Frequency, F (Hz) 8 3 100k 0 0.2 0.4 0.6 0.8 1.0 1.2 Resistor Value, RCL (ɏ) PA92U Rev V PA92 SAFE OPERATING AREA (SOA) The safe operating area curves define the maximum additional internal power dissipation the amplifier can tolerate when it produces the necessary output to drive an external load. The MOSFET output stage of this power operational amplifier has two distinct limitations: 1. The current handling capability of the MOSFET geometry and the wire bonds. 2. The junction temperature of the output MOSFETs. Note: The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. KƵƚƉƵƚƵƌƌĞŶƚ&ƌŽŵнVSŽƌͲVS (A) Figure 14: SOA 8 6 4 DC, TC = 25°C 200 ms 100 ms 2 T 1 0.8 T C 0.6 0.4 0.3 0.2 0.1 0.08 0.06 0.04 10 C =1 =8 25 5° C °C 20 30 40 60 80 100 200 300 500 ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕VS - VOUT (V) PA92U Rev V 9 PA92 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. PHASE COMPENSATION Gain CC* RC ≥1 ≥2 ≥3 ≥12 150pF 100pF 47pF 10pF 100 Ω 100 Ω 0Ω 0Ω *CC Never to be