National Semiconductor LM12 free download

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LM12 80W Operational Amplifier March 1995 LM12 80W Operational Amplifier General Description The LM12 is a power op amp capable of driving g 25V at g 10A while operating from g 30V supplies The monolithic IC can deliver 80W of sine wave power into a 4X load with 0 01% distortion Power bandwidth is 60 kHz Further a peak dissipation capability of 800W allows it to handle reactive loads such as transducers actuators or small motors without derating Important features include Y input protection Y controlled turn on Y thermal limiting Y overvoltage shutdown Y output-current limiting Y dynamic safe-area protection The IC delivers g 10A output current at any output voltage yet is completely protected against overloads including shorts to the supplies The dynamic safe-area protection is provided by instantaneous peak-temperature limiting within the power transistor array The turn-on characteristics are controlled by keeping the output open-circuited until the total supply voltage reaches 14V The output is also opened as the case temperature exceeds 150 C or as the supply voltage approaches the BVCEO of the output transistors The IC withstands overvoltages to 80V This monolithic op amp is compensated for unity-gain feedback with a small-signal bandwidth of 700 kHz Slew rate is 9V ms even as a follower Distortion and capacitive-load stability rival that of the best designs using complementary output transistors Further the IC withstands large differential input voltages and is well behaved should the commonmode range be exceeded The LM12 establishes that monolithic ICs can deliver considerable output power without resorting to complex switching schemes Devices can be paralleled or bridged for even greater output capability Applications include operational power supplies high-voltage regulators high-quality audio amplifiers tape-head positioners x-y plotters or other servo-control systems b The LM12 is supplied in a four-lead TO-3 package with V on the case A gold-eutectic die-attach to a molybdenum interface is used to avoid thermal fatigue problems The LM12 is specified for either military or commercial temperature range Connection Diagram 4-pin glass epoxy TO-3 socket is available from AUGAT INC Part number 8112-AG7 Typical Application TL H 8704 ­ 2 TL H 8704 ­ 1 Low distortion (0 01%) audio amplifier Bottom View Order Number LM12CLK See NS Package Number K04A C1995 National Semiconductor Corporation TL H 8704 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Total Supply Voltage (Note 1) Input Voltage Output Current 80V (Note 2) Internally Limited Junction Temperature Storage Temperature Range Lead Temperature (Soldering 10 seconds) (Note 3) b 65 C to 150 C 300 C Operating Ratings Total Supply Voltage Case Temperature (Note 4) 15V to 60V 0 C to 70 C Electrical Characteristics (Note