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-to- 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. BLOCK DIAGRAM October 1991 1/10 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 Parameter Value Unit 18 V VS op Operating Supply Voltage VS max Supply Voltage 28 V VPEAK Peak Supply Voltage (t = 50ms) 40 V Vi Input Voltage VS op V Vi Differential Input Voltage VS op V IO Output Peak Current (non rep. t = 100µs) 5 A IO Output Peak Current (rep. f > 10Hz) 4 A Power Dissipation TCASE = 85°C 36 W -40 to 150 °C Ptot Tstg, Tj Storage and Junction Temperature THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction-case Max Value Unit 1.8 °C/W ELECTRICAL CHARACTERISTICS (Refer to the operational amplifier with G V = 24dB; VS = 14.4V; Tamb = 25°C, unless otherwise specified Symbol Supply Voltage Id Total Quiescent Drain Current Typ. 4 Unit 18 V mA ST-BY Current Consumption 50 µA Input Bias Current 0.5 µA IS IOS Input Offset Current 30 Max. mV ISB 50 nA Output Voltage Drop (High) IO = 0.5A IO = 3A 0.25 1.1 0.5 2.5 V V Output Voltage Drop (Low) IO = 0.5A IO = 3A 0.25 1 0.5 2 V V Slew Rate B Gain Bandwidth Prod GV Open Loop Voltage Gain R IN Input Resistance EIN Input Noise Voltage CMRR Min. 5 Input Offset Voltage SR Test Condition 50 VOS VDROP 2/10 Parameter VS Common Mode Rejection Ratio f = 1KHz Rs = 0 to 10KΩ f = 22Hz to 22KHz 75 4 V/µs 10 MHz 85 dB 150 MΩ 3 µV 90 dB L2750 ELECTRICAL CHARACTERISTICS (continued) Symbol SVR CT Parameter Test Condition Supply Voltage Rejection Rs = 0 f = 100Hz Crosstalk f = 1KHz to 10KHz APPLICATION SUGGESTION The high flexibility makes the L2750 suitable for a wide range of applications. Min. Typ. Max. Unit 75 90 dB 80 dB Figure 2: Low Drop Voltage vs. Output Current 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: Figure 3: High Drop Voltage vs. Output Current 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 4Ω load is 24W (VS = 14.4V; d =10%), as shown by the characteristics enclosed. Figure 4: Open Loop Gain vs. Phase Response Figure 1 3/10 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) 4/10 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 5/10 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) 6/10 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 7/10 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 8/10 L2750 MULTIWATT11 PACKAGE MECHANICAL DATA DIM. MIN. mm TYP. A B C MAX. MIN. inch TYP. 5 2.65 1.6 D E F 0.49 0.88 G G1 H1 1.57 16.87 19.6 H2 L L1 21.5 21.4 L2 L3 L4 17.4 17.25 10.3 L7 M M1 2.65 4.1 4.88 S S1 Dia1 1.9 1.9 3.65 0.197 0.104 0.063 1 1.7 17 MAX. 0.039 0.55 0.95 0.019 0.035 1.83 17.13 0.062 0.664 0.772 0.022 0.037 0.067 0.669 0.072 0.674 20.2 22.3 22.2 0.846 0.843 0.795 0.878 0.874 17.5 10.7 18.1 17.75 10.9 0.685 0.679 0.406 0.689 0.421 0.713 0.699 0.429 4.3 5.08 2.9 4.5 5.3 0.104 0.161 0.192 0.169 0.200 0.114 0.177 0.209 2.6 2.6 3.85 0.075 0.075 0.144 0.102 0.102 0.152 9/10 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. 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. 10/10