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L2750
DUAL LOW DROP HIGH POWER OPERATIONAL AMPLIFIER
ADVANCE DATA
HIGH OUTPUT CURRENT VERY LOW SATURATION VOLTAGE LOW VOLTAGE OPERATION LOW INPUT OFFSET VOLTAGE GND COMPATIBLE INPUTS ST-BY FUNCTION (LOW CONSUMPTION) HIGH APPLICATION FLEXIBILITY PROTECTIONS: VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE LOAD DUMP VOLTAGE FORTUITOUS OPEN GROUND ESD DESCRIPTION The L2750 is a new technology class AB dual power operational amplifier assembled in Multiwatt 11 package. Thanks to the fully complementary PNP/NPN output configuration the L2750 can deliver a rail-toBLOCK DIAGRAM
Multiwatt-11 ORDERING NUMBER: L2750
rail output voltage swing even at the highest current. Additional feature is the very low current StandBy function. The high application flexibility of the L2750 makes the device suitable for either motor driving/control and audio applications purposes.
October 1991
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This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
L2750
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol VS op VS max VPEAK Vi Vi IO IO Ptot Tstg, Tj Operating Supply Voltage Supply Voltage Peak Supply Voltage (t = 50ms) Input Voltage Differential Input Voltage Output Peak Current (non rep. t = 100s) Output Peak Current (rep. f > 10Hz) Power Dissipation TCASE = 85C Storage and Junction Temperature Parameter Value 18 28 40 VS op VS op 5 4 36 -40 to 150 Unit V V V V V A A W C
THERMAL DATA
Symbol Rth j-case Thermal Resistance Junction-case Description Max Value 1.8 Unit C/W
ELECTRICAL CHARACTERISTICS (Refer to the operational amplifier with G V = 24dB; VS = 14.4V; Tamb = 25C, unless otherwise specified
Symbol VS Id VOS ISB IS IOS VDROP Parameter Supply Voltage Total Quiescent Drain Current Input Offset Voltage ST-BY Current Consumption Input Bias Current Input Offset Current Output Voltage Drop (High) Output Voltage Drop (Low) SR B GV R IN EIN CMRR 2/10 Slew Rate Gain Bandwidth Prod Open Loop Voltage Gain Input Resistance Input Noise Voltage Common Mode Rejection Ratio Rs = 0 to 10K f = 22Hz to 22KHz 75 f = 1KHz IO = 0.5A IO = 3A IO = 0.5A IO = 3A 0.25 1.1 0.25 1 4 10 85 150 3 90 Test Condition Min. 4 30 Typ. Max. 18 50 5 50 0.5 50 0.5 2.5 0.5 2 Unit V mA mV A A nA V V V V V/s MHz dB M V dB
L2750
ELECTRICAL CHARACTERISTICS (continued)
Symbol SVR CT Parameter Supply Voltage Rejection Crosstalk Test Condition Rs = 0 f = 100Hz f = 1KHz to 10KHz Min. 75 Typ. 90 80 Max. Unit dB dB
APPLICATION SUGGESTION The high flexibility makes the L2750 suitable for a wide range of applications. Motor Controller The device can be utilized as a motor controller. Fig.1 represents a bidirectional DC motor control suitable for logic driving. In these kinds of application it is possible to take advantage of the high current capability of the L2750 for driving several types of low impedance motors in a broad range of applications. Moreover the low drop allows high start up currents even at lowest supply voltage. Audio Applications Another typical utilization of the L2750 concerns the audio field, as follows: 1) DRIVER FOR BOOSTER : The remarkably low distortion and noise makes the device proper to be used as high quality driver for main amplifiers (i.e. car radio boosters). An example is shown by Fig. 5, where the gain is set to 24 dB (see also the relevant characteristics). 2) CAR RADIO BOOSTER WITH DIFFERENTIAL INPUT : Fig. 10 shows an example of car radio booster, with a gain of 30 dB, that is specially recommended for active loudspeakers. Among its main feature is the differential input and subsequent high noise suppression. The typical output power delivered into a 4 load is 24W (VS = 14.4V; d =10%), as shown by the characteristics enclosed.
Figure 2: Low Drop Voltage vs. Output Current
Figure 3: High Drop Voltage vs. Output Current
Figure 4: Open Loop Gain vs. Phase Response Figure 1
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L2750
Figure 5: Stereo Audio Amplifier Application Circuit
Figure 6: P.C. Board and Components Layout of the Circuit of Figure 5 (1:1 scale)
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L2750
AUDIO STEREO APPLICATION CIRCUIT OF FIGURE 5 Figure 7: Quiescent Drain Current vs. Supply Voltage Figure 8: Distortion vs. Output Voltage
Figure 9: Distortion vs. Frequency
Figure 10: Cross-Talk vs Frequency
Figure 11: SupplyVoltage Rejection vs. Frequency
Figure 12: EN Input vs. Rg
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L2750
Figure 13: Bridge Power Amplifier with Balanced Input Application Circuit
Figure 14: P.C. Board and Component Layout of the Circuit of Figure 13 (1:1 scale)
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L2750
BRIDGE AUDIO APPLICATION CIRCUIT OF FIGURE 13 Figure 15: Quiescent Drain Current vs. Supply Voltage Figure 16: Noise vs. RS
Figure 17: Output Power vs. Supply Voltage
Figure 18: Output Power vs Supply Voltage
Figure 19: Distortion vs. Output Power
Figure 20: Distortion vs. Output Power
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L2750
Figure 21: Distortion vs. Output Power Figure 22: Distortion vs. Output Power
Figure 23: Distortion vs. Frequency
Figure 24: Supply Voltage Rejection vs. Frequency
Figure 25: Total Power Dissipation and Efficiency vs. Output Power
Figure 26: Total Power Dissipation and Efficiency vs. Output Power
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L2750
MULTIWATT11 PACKAGE MECHANICAL DATA
DIM. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 1 0.49 0.88 1.57 16.87 19.6 21.5 21.4 17.4 17.25 10.3 2.65 4.1 4.88 1.9 1.9 3.65 17.5 10.7 4.3 5.08 1.7 17 0.55 0.95 1.83 17.13 20.2 22.3 22.2 18.1 17.75 10.9 2.9 4.5 5.3 2.6 2.6 3.85 0.019 0.035 0.062 0.664 0.772 0.846 0.843 0.685 0.679 0.406 0.104 0.161 0.192 0.075 0.075 0.144 0.689 0.421 0.169 0.200 0.067 0.669 MIN. mm TYP. MAX. 5 2.65 1.6 0.039 0.022 0.037 0.072 0.674 0.795 0.878 0.874 0.713 0.699 0.429 0.114 0.177 0.209 0.102 0.102 0.152 MIN. inch TYP. MAX. 0.197 0.104 0.063
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L2750
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
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