MP108A

厂商：
APEX
封装：
描述：
MP108A - POWER OPERATIONAL AMPLIFIER - Cirrus Logic

数据手册：

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数据手册
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MP108A 数据手册

�� FEATURES • LOW COST • HIGH VOLTAGE - 200 VOLTS • HIGH OUTPUT CURRENT - 10 AMPS • 100 WATT DISSIPATION CAPABILITY • 300kHz POWER BANDWIDTH APPLICATIONS • INKJET PRINTER HEAD DRIVE • PIEZO TRANSDUCER DRIVE • INDUSTRIAL INSTRUMENTATION • REFLECTOMETERS • ULTRA-SOUND TRANSDUCER DRIVE 34-PIN DIP PACKAGE STYLE FD TYPICAL APPLICATION �� DESCRIPTION The MP108 operational ampliﬁer is a surface mount constructed component that provides a cost effective solution in many industrial applications. The MP108 offers outstanding performance that rivals much more expensive hybrid components yet has a footprint of only 4 sq in. The MP108 has many optional features such as four-wire current limit sensing and external compensation. The 300 kHz power bandwidth and 10 amp output of the MP108 makes it a good choice for piezo transducer drive applications. The MP108 is built on a thermally conductive but electrically insulating substrate that can be mounted to a heat sink. �� EQUIVALENT CIRCUIT DIAGRAM �� INKJET NOZZLE DRIVE The MP108's fast slew rate and wide power bandwith make it an ideal nozzle driver for industrial inkjet printers. The 10 amp output capability can drive hundreds of nozzles simultaneously. EXTERNAL CONNECTIONS �� APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com 1 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS MP108 • MP108A SUPPLY VOLTAGE, +VS to -VS SUPPLY VOLTAGE, +VB SUPPLY VOLTAGE, -VB OUTPUT CURRENT, peak POWER DISSIPATION, internal, DC INPUT VOLTAGE TEMPERATURE, pin solder, 10s TEMPERATURE, junction2 TEMPERATURE RANGE, storage OPERATING TEMPERATURE, case 200V +VS + 15V6 -VS – 15V6 12A, within SOA 100W +VB to -VB 225°C. 150°C. -40 to 105°C. -40 to 85°C. ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PARAMETER INPUT OFFSET VOLTAGE OFFSET VOLTAGE vs. temperature OFFSET VOLTAGE vs. supply BIAS CURRENT, initial3 BIAS CURRENT vs. supply OFFSET CURRENT, initial INPUT RESISTANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION, DC NOISE TEST CONDITIONS1 MIN MP108 TYP 1 20 MAX 5 50 20 100 0.1 50 +VB - 15 -VB + 15 MIN MP108A TYP MAX * * 3 * * 70 * 30 * * UNITS mV µV/°C µV/V pA pA/V pA Ω pF V V dB µV RMS dB MHz degrees V V V V A V/µS µS Ω kHz * * * * * * V mA °C/W °C/W °C/W °C Full temperature range 1011 4 92 * * * 1MHz bandwidth, 1kΩ RS 10 * GAIN OPEN LOOP @ 15Hz RL = 10KΩ, CC = 10pF GAIN BANDWIDTH PRODUCT @ 1MHz CC = 10pF PHASE MARGIN Full temperature range OUTPUT VOLTAGE SWING VOLTAGE SWING VOLTAGE SWING VOLTAGE SWING CURRENT, continuous, DC SLEW RATE, AV = -20 SETTLING TIME, to 0.1% RESISTANCE POWER BANDWIDTH 180VP-P POWER SUPPLY VOLTAGE CURRENT, quiescent THERMAL RESISTANCE, AC, junction to case5 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case Full temperature range, f ≤ 60Hz Full temperature range, f < 60Hz Full temperature range IO = 10A IO = -10A IO = 10A, +VB = +VS +10V IO = -10A, -VB = -VS -10V 96 45 10 * * * * * * 11 * * +VS - 10 +VS - 8.6 -VS + 10 -VS + 7 +VS - 1.6 -VS + 5.1 10 CC = 10pF 150 170 2V Step 1 No load, DC 5 CC = 10pF, +VS = 100V, -VS = -100V 300 ±15 ±75 50 ±100 65 1 1.25 13 85 * * * * * * * * * -40 * NOTES: 1. Unless otherwise noted: TC=25°C, compensation CC=100pF, DC input speciﬁcations are value given, power supply voltage is typical rating. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTBF. 3. Doubles for every 10°C of case temperature increase. 4. +VS and -VS denote the positive and negative supply voltages to the output stage. +VB and -VB denote the positive and negative supply voltages to the input stages. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. Power supply voltages +VB and -VB must not be less than +VS and -VS respectively. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 2 MP108 • MP108A �� TYPICAL PERFORMANCE GRAPHS �� APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com 3 OPERATING CONSIDERATIONS MP108 • MP108A parasitic oscillation in the output stage of the MP108. Use electrolytic capacitors at least 10µF per output amp required. Bypass the electrolytic capacitors with high quality ceramic capacitors (X7R) 0.1µF or greater. In most applications power supply terminals +VB and -VB will be connected to +VS and -VS respectively. Supply voltages +VB and -VB are bypassed internally but both ground pins 3 and 32 must be connected to the system signal ground to be effective. In all cases power to the buffer ampliﬁer stage of the MP108 at pins 8 and 25 must be connected to +VB and -VB at pins 4 and 30 respectively. Provide local bypass capacitors at pins 8 and 25. See the external connections diagram on page 1. �� GENERAL Please read Application Note 1 "General Operating Considerations" which covers stability, power supplies, heat sinking, mounting, current limit, SOA interpretation, and speciﬁcation interpretation. Visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit, heat sink selection, Apex's complete Application Notes library, Technical Seminar Workbook and Evaluation Kits. GROUND PINS The MP108 has two ground pins (pins 3, 32). These pins provide a return for the internal capacitive bypassing of the small signal portions of the MP108. The two ground pins are not connected together on the substrate. Both of these pins are required to be connected to the system signal ground. �� SAFE OPERATING AREA The MOSFET output stage of the MP108 is not limited by second breakdown considerations as in bipolar output stages. Only thermal considerations and current handling capabilities limit the SOA (see Safe Operating Area graph on previous page). The output stage is protected against transient ﬂyback by the parasitic body diodes of the output stage MOSFET structure. However, for protection against sustained high energy ﬂyback external fast-recovery diodes must be used. �� FIGURE 1 OVERVOLTAGE PROTECTION FIGURE 2 4 WIRE CURRENT LIMIT COMPENSATION The external compensation capacitor CC is connected between pins 5 and 6. Unity gain stability can be achieved with any capacitor value larger than 100pF for a minimum phase margin of 45 degrees. At higher gains more phase shift can usually be tolerated in most designs and the compensation capacitor value can be reduced resulting in higher bandwidth and slew rate. Use the typical operating curves as a guide to select CC for the application. An NPO (COG) type capacitor is required rated for the full supply voltage (200V). 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 28 must be connected to the ampliﬁer output side and pin 27 connected to the load side of the current limit resistor RLIM as shown in Figure 2. This connection will bypass any parasitic resistances RP, formed by socket 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 2. The value of the current limit resistor can be calculated as follows: RLIM = .65/ILIMIT OVERVOLTAGE PROTECTION Although the MP108 can withstand differential input voltages up to ±25V, additional external protection is recommended. In most applications 1N4148 signal diodes connected anti-parallel across the input pins is sufﬁcient. In more demanding applications where bias current is important diode connected JFETs such as 2N4416 will be required. See Q1 and Q2 in Figure 1. In either case the differential input voltage will be clamped to ±0.7V. This is usually sufﬁcient overdrive to produce the maximum power bandwidth. Some applications will also need over voltage protection devices connected to the power supply rails. Unidirectional zener diode transient suppressors are recommended. The zeners clamp transients to voltages within the power supply rating and also clamp power supply reversals to ground. Whether the zeners are used or not the system power supply should be evaluated for transient performance including power-on overshoot and power-off polarity reversals as well as line regulation. See Z1 and Z2 in Figure 1. BOOST OPERATION With the boost feature the small signal stages of the ampliﬁer are operated at a higher supply voltages than the ampliﬁerís high current output stage. +VB (pins 4,8) and -VB (pins 25,30) are connected to the small signal stages and +VS (pins 14-16) and -VS (pins 17-19) are connected to the high current output stage. An additional 10V on the +VB and -VB pins is sufﬁcient to allow the small signal stages to drive the output stage into the triode region and improve the output voltage swing for extra efﬁcient operation when required. When the boost feature is not needed +VS and -VS are connected to the +VB and -VB pins respectively. The +VB and -VB pins must not be operated at supply voltages less than +VS and -VS respectively. BACKPLATE GROUNDING The substrate of the MP108 is an insulated metal substrate. It is required that it be connected to signal ground. Connect pin 2 (back plate) to signal ground. The back plate will then be AC grounded to signal ground through a 1µF capacitor. POWER SUPPLY BYPASSING Bypass capacitors to power supply terminals +VS and -VS must be connected physically close to the pins to prevent local This data sheet has been carefully checked and is believed to be NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 or USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 APEX MICROTECHNOLOGY CORPORATION • 5980 reliable, however, no responsibility is assumed for possible inaccuracies • omissions. All speciﬁcations are subject to change without notice. 4 MP108 REV C JANUARY 2005 © 2005 Apex Microtechnology Corp.

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