L465A STMICROELECTRONICS | Alldatasheet
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oe: git t Bee. . ADVANCE DATA HIGH EFFICIENCY POWER OPERATIONAL AMPLIFIER @ OUTPUT CURRENT TO 4A @ SUPPLY VOLTAGE TO + 20V @ LARGE COMMON-MODE RANGE @ LARGE DIFFERENTIAL MODE RANGE @ LARGE BANDWIDTH @ LOW SATURATION @ SOA PROTECTION @ SHORT CIRCUIT PROTECTION @ THERMAL PROTECTION The L465A is a monolithic integrated circuit in PENTAWATT package, intended for use as power oper- ‘ ational amplifier in a wide range vf applications, including servo amplifiers and power supplies. The high gain and high output power capability provide superior performance wherever an operational . amplifier/power booster combination is required. i i i ABSOLUTE MAXIMUM RATINGS F Vs Supply voltage +20 Vv j Vi Input voltage Vs i} Vi Differential input voltage £15 Vv i Io Peak output current (internally limited) 4 A H Prot Power dissipation at Tease = 90°C 20 WwW i Tstgr Tj Storage and junction temperature -40 to 150 °c f i ORDERING NUMBER: L465 MECHANICAL DATA Dimensions in mm . 1785 Te WL — 2 woo | i Dg 375-385 roe —=_—— = {<7 x C2 LL en 1586 83 3/83 : me ene a
a CONNECTION DIAGRAM (top view) slg i 4 outeut ) — -s ‘ 2 INVERTING INPUT
1 NON INVERTING INPUT
Fig. 1 - Application circuit (Gy > 20 dB) +Vs, fo) On nF an 1N4001 CaN fo) R2 $-s900"1 (Jes Fig. 2 - Application circuit (Unity gain) ‘ 10KN {—} . oT val) | > : PB R i) [] ‘ s-s9out a
a THERMAL DATA Rtn j-case Thermal resistance junction-case max 3 °C/W ELECTRICAL CHARACTERISTICS (Vs = + 15V, Tamp= 25°C unless otherwise specified) Vs Supply voltage [es | | w |v | [ eT ey | Pape] | Vy + 18V i t Vo Output voltage swing f=1kHz Ip = 0.54 26 27 v, i Ip = 4A 25 pp H f= 10 kHz 1p = 0.5A 27 ! frome [Te | [oe : f=1KHz B = 10 to 10 000 Hz [reo] cmR Common mode rejection Rg <10K2 Gy = 300B | [7 | fee | vA Sei votanreicion [Ry zzan Ga | | | pw Vrippie= 0-5 Vims f=1kHz Ip=3A RL=42 Tsa Thermal shutdown junction “c temperature 85 |
APPLICATION INFORMATION
This circuit carries out bidirectional speed control of DC motors (fig. 3). The motor runs in one direction or in another according to whether the input voltage is higher or lower than V,/2. The output impedance of the circuit seen by the motor is Ry = 284 RI so by imposing x that the equation Ry = Ry (Ry = internal resistance of motor) is checked the maximum load regula- tion condition is obtained. For circuit stability it should be Rm > IRo| hence we get Ry > 2R4:R1 Ru The voltage available at the terminals of the motor is Va = 2(Vin = GE) + 1 Rol + | Fig. 3 - Bidirectional speed contro! of DC motors Vs fe) 226 foour oO -— 1 oz waoor? Ter GD Tincoos (] J RS Ce ‘Cee ral Af 5 AT | 19 1A. “7 ier ! 7 lp [asd ~ Co) <n] of In| 3 Tf +t Bown ke O 2 C5 - i 100K A vOOKA 5+ 5902 . Fig. 4 - Bidirectional DC motor control with TTL/C-MOS/yP compatible inputs O N52 4x1N4O01 £10 1 = | 1 _oe2 race 2 Tt 2 mer r 0.4 pF 339007 Vs, = logic supply voltage Must be Vso > Vs) E1, E2 = logic inputs Too oo