L298电机驱动芯片资料

L298Jenuary 2000DUAL FULL-BRIDGE DRIVERMultiwatt15ORDERING NUMBERS :L298N (MultiwattVert.L298HN (MultiwattHoriz. L298P (PowerSO20BLOCK DIAGRAM. OPERATING SUPPLY VOLTAGE UP TO 46V . TOTAL DC CURRENT UP TO 4A . LOW SATURATION VOLTAGE. OVERTEMPERATURE PROTECTION.LOGICAL ”0”INPUT VOLTAGE UP TO 1.5V (HIGHNOISE IMMUNITYDESCRIPTIONThe L298is an integrated monolithic circuit in a 15-lead Multiwatt andPowerSO20packages. It is a high voltage, high current dual full-bridge driver de-signedto acceptstandardTTL logic levels anddrive inductive loads such as relays, solenoids, DC and steppingmotors. Two enableinputs are provided to enableor disablethe deviceindependentlyof thein-put signals. The emitters of the lower transistors of each bridge are connected togetherand the corre-sponding external terminal can be used for the con-nectionof an externalsensing resistor.Anadditional supply input is provided so that the logic works at a lower voltage.PowerSO20®1/13PIN CONNECTIONS (topviewGND Input 2VSS N.C. Out 1V S Out 2Input 1Enable A Sense AGND1089765432131415161719182012111GNDD95IN239Input 3Enable B Out 3Input 4Out 4N.C. Sense B GND ABSOLUTE MAXIMUM RATINGSSymbol ParameterValue Unit V S Power Supply 50V V SS Logic Supply Voltage 7V V I ,V en Input and Enable Voltage–0.3to 7V I OPeak Output Current (eachChannel –Non Repetitive (t=100µs–Repetitive(80%on –20%off; t on =10ms –DCOperation 32.52A A A V sens Sensing Voltage–1to 2.3V P tot Total Power Dissipation (Tcase =75°C 25W T op Junction Operating Temperature –25to 130°C T stg , T jStorage and Junction Temperature–40to 150°CTHERMAL DATASymbol ParameterPowerSO20Multiwatt15Unit R th j-case Thermal Resistance Junction-case Max. –3°C/WR th j-ambThermal Resistance Junction-ambientMax.13(*35°C/W(*Mounted on aluminum substrate1234567910118ENABLE B INPUT 3LOGIC SUPPLY VOLTAGE V SS GND INPUT 2ENABLE A INPUT 1SUPPLY VOLTAGE V S OUTPUT 2OUTPUT 1CURRENT SENSING ATAB CONNECTED TO PIN 813141512CURRENT SENSING B OUTPUT4OUTPUT 3INPUT 4D95IN240AMultiwatt15PowerSO20L2982/13PIN FUNCTIONS (referto the block diagramMW.15PowerSO Name Function1;152;19Sense A; Sense B Between this pin and ground is connected the sense resistor to control the current of the load.2;34;5Out 1; Out 2Outputs of the Bridge A; the current that flows through the load connected between these two pins is monitored at pin 1.46V SSupply Voltage for the Power Output Stages.A non-inductive 100nF capacitor must be connected between this pin and ground.5;77;9Input 1; Input 2TTL Compatible Inputs of the Bridge A.6;118;14Enable A; Enable BTTL Compatible Enable Input:the L state disables the bridge A (enableA and/orthe bridge B (enableB. 81,10,11,20GND Ground.912VSS Supply Voltage for the Logic Blocks. A100nF capacitor must be connected between this pin and ground. 10; 1213;15Input 3; Input 4TTL Compatible Inputs of the Bridge B.13; 1416;17Out 3; Out 4Outputs of the Bridge B. The current that flows through the load connected between these two pins is monitored at pin 15. –3;18N.C.Not ConnectedELECTRICAL CHARACTERISTICS (VS =42V; V SS =5V, T j =25°C; unless otherwise specifiedSymbol ParameterTest ConditionsMin. Typ.Max. Unit V S Supply Voltage (pin4 Operative ConditionV IH +2.546V V SS Logic Supply Voltage (pin9 4.557V I SQuiescent Supply Current (pin4V en =H; I L =0V i =L V i =H 13502270mA mA V en =LV i =X 4mA I SSQuiescent Current from V SS (pin9 V en =H; I L =0V i =L V i =H 2473612mA mA V en =LV i =X6mA V iL Input Low Voltage (pins5, 7, 10, 12 –0.31.5V V iH Input High Voltage (pins5, 7, 10, 12 2.3VSS V I iL Low Voltage Input Current (pins5, 7, 10, 12V i =L–10µA I iH High Voltage Input Current (pins5, 7, 10, 12Vi =H ≤V SS –0.6V30100µA V en =L Enable Low Voltage (pins6, 11 –0.31.5V V en =H Enable High Voltage (pins6, 11 2.3V SS V I en =L Low Voltage Enable Current (pins6, 11V en =L–10µA I en =HHigh Voltage Enable Current (pins6, 11V en =H ≤V SS –0.6V30100µA V CEsat (HSource Saturation Voltage I L =1A I L =2A 0.951.3521.72.7V V V CEsat (LSink Saturation Voltage I L =1A (5I L =2A (50.851.21.71.62.3V V V CEsat Total DropI L =1A (5I L =2A(51.803.24.9V V V sensSensing Voltage (pins1, 15–1(12V L2983/13Figure 1:Typical Saturation Voltage vs. OutputCurrent.Figure 2:Switching Times Test Circuits.Note :For INPUT Switching, set EN =HFor ENABLESwitching, set IN =H1 1Sensing voltage can be –1V for t ≤50µsec; in steady state V sens min ≥–0.5V.2 See fig. 2.3 See fig. 4.4 The load must be a pure resistor.ELECTRICAL CHARACTERISTICS (continuedSymbol ParameterTest ConditionsMin.Typ. Max.Unit T 1(Vi Source Current Turn-off Delay 0.5V i to 0.9I L (2;(41.5µs T 2(Vi Source Current Fall Time 0.9I L to 0.1I L (2;(40.2µs T 3(Vi Source Current Turn-on Delay 0.5V i to 0.1I L (2;(42µs T 4(Vi Source Current Rise Time 0.1I L to 0.9I L(2;(40.7µs T 5(Vi Sink Current Turn-off Delay 0.5V i to 0.9I L (3;(40.7µs T 6(Vi Sink Current Fall Time 0.9I L to 0.1I L (3;(40.25µs T 7(Vi Sink Current Turn-on Delay 0.5V i to 0.9I L (3;(41.6µs T 8(Vi Sink Current Rise Time 0.1I L to 0.9I L (3;(40.2µs fc (Vi Commutation Frequency I L =2A 2540KHz T 1(Ven Source Current Turn-off Delay 0.5V en to 0.9I L (2;(43µs T 2(Ven Source Current Fall Time 0.9I L to 0.1I L (2;(41µs T 3(Ven Source Current Turn-on Delay 0.5V en to 0.1I L (2;(40.3µs T4(Ven Source Current Rise Time 0.1I L to 0.9I L (2;(40.4µs T 5(Ven Sink Current Turn-off Delay 0.5V en to 0.9I L (3;(42.2µs T 6(Ven Sink Current Fall Time 0.9I L to 0.1I L (3;(40.35µs T 7(Ven Sink Current Turn-on Delay 0.5V en to 0.9I L (3;(40.25µs T 8(VenSink Current Rise Time0.1I L to 0.9I L(3;(40.1µsL2984/13Figure 3:Source Current Delay Times vs. Input or Enable Switching. Figure 4:Switching Times Test Circuits.Note :For INPUT Switching, set EN =HFor ENABLE Switching, set IN =LL2985/13Figure 5:Sink Current Delay Times vs. Input 0V Enable Switching. Figure 6:Bidirectional DC Motor Control.L =LowH =HighX =Don’tcareInputsFunction V en =HC =H ;D =L Forward C =L ; D =H Reverse C =DFast Motor Stop V en =LC =X ;D =XFree Running Motor StopL2986/13Figure 7:For higher currents, outputs can be paralleled. Take care to parallel channel 1with channel 4and channel 2with channel 3.APPLICATION INFORMATION (Referto the block diagram 1.1. POWER OUTPUT STAGE TheL298integratestwopoweroutputstages(A;B.The power output stage is a bridge configuration and its outputs can drive an inductive load in com-mon or differenzialmode, dependingon thestate of the inputs. The current that flows through the loadcomes out from the bridge at the sense output :anexternalresistor (RSA ; R SB . allows to detect the in-tensity of this current.1.2. INPUT STAGE Each bridge is driven by means of four gatesthe in-put of which are In1; In2; EnA and In3; In4; EnB. The In inputsset thebridge state when The En input is high; a lowstateof theEn inputinhibitsthe bridge. All the inputs are TTL compatible. 2. SUGGESTIONSA non inductive capacitor, usually of 100nF, mustbe foreseen between both Vs and Vss, to ground,as near as possible to GND pin. When the large ca-pacitor of the power supply is too far from the IC, a second smaller one must be foreseen near the L298. The sense resistor, not of a wire wound type, must be groundednear the negative pole of Vs that must be near the GND pin of the I.C. Each input must be connected to the source of thedriving signals by means of a very short path. Turn-On and Turn-Off :Before to Turn-ONthe Sup-plyVoltageand beforeto Turnit OFF,the Enablein-put must be driven to the Low state. 3. APPLICATIONS Fig 6shows a bidirectional DC motor controlSche-matic Diagram for which only one bridge is needed. The external bridge of diodes D1to D4is made byfour fast recovery elements (trr ≤200nsec that must be chosen of a VF as low as possible at theworst case of the load current. The senseoutputvoltage can be used to controlthe current amplitude by chopping the inputs,or to pro-vide overcurrent protection by switching low the en-able input. The brake function (Fastmotor stop requires that the Absolute Maximum Rating of 2Amps must never be overcome. When the repetitive peak current needed from theload is higher than 2Amps, a paralleled configura-tion can be chosen (SeeFig.7. An external bridge of diodes are required when in-ductive loads are driven and when the inputs of the ICare chopped; Shottkydiodeswould bepreferred.L2987/13This solution can drive until 3AmpsIn DC operation and until 3.5Amps of a repetitive peak current. OnFig 8it is shownthedriving ofa twophasebipolar stepper motor ; the needed signals to drive the in-puts of the L298are generated, in this example, from the IC L297.Fig 9shows an example of P.C.B. designed for the application of Fig 8.Fig 10shows a second two phase bipolar stepper motor control circuit where the current is controlled by the I.C. L6506.Figure 8:Two Phase Bipolar Stepper Motor Circuit.This circuit drives bipolar stepper motors with winding currents up to 2A. The diodes are fast 2A types.R S1=R S2=0.5ΩD1to D8=2A Fast diodes{V F ≤1.2V @I =2A trr ≤200nsL2988/13Figure 9:SuggestedPrinted Circuit Board Layout for the Circuit of fig. 8(1:1scale.Figure 10:Two Phase Bipolar Stepper Motor Control Circuit by Using the Current Controller L6506.R R and R sense depend from the load currentL2989/13Multiwatt15VDIM. mminch MIN.TYP.MAX. MIN.TYP.MAX. A 50.197 B 2.650.104C 1.60.063D 10.039E 0.490.550.0190.022F 0.660.750.0260.030G1.021.271.520.0400.0500.060G117.5317.7818.030.6900.7000.710H119.60.772H220.20.795L 21.922.222.50.8620.8740.886L121.722.122.50.8540.8700.886 L217.6518.10.6950.713L317.2517.517.750.6790.6890.699L410.310.710.90.4060.4210.429L72.652.90.1040.114 M 4.254.554.850.1670.1790.191M14.635.085.530.1820.2000.218S1.92.60.0750.102S11.92.60.0750.102Dia13.653.850.1440.152OUTLINE AND MECHANICAL DATAL29810/13L298 DIM. MIN. A B C E F G G1 H1 H2 L L1 L2 L3 L4 L5 L6 L7 S S1 Dia1 2.65 1.9 1.9 3.65 17.25 10.3 20.57 18.03 2.54 17.5 10.7 5.28 2.38 2.9 2.6 2.6 3.85 0.104 0.075 0.075 0.144 17.75 10.9 0.679 0.406 0.49 0.66 1.14 17.57 19.6 20.2 0.810 0.710 0.100 0.689 0.421 0.208 0.094 0.114 0.102 0.102 0.152 0.699 0.429 1.27 17.78 mm TYP. MAX. 5 2.65 1.6 0.55 0.75 1.4 17.91 0.019 0.026 0.045 0.692 0.772 0.795 0.050 0.700 MIN. inch TYP. MAX. 0.197 0.104 0.063 0.022 0.030 0.055 0.705 OUTLINE AND MECHANICAL DATA Multiwatt15 H 11/13L298 mm TYP. inch TYP. DIM. A a1 a2 a3 b c D (1 D1 E e e3 E1 (1 E2 E3 G H h L N S T MIN. 0.1 0 0.4 0.23 15.8 9.4 13.9 MAX. 3.6 0.3 3.3 0.1 0.53 0.32 16 9.8 14.5 MIN. 0.004 0.000 0.016 0.009 0.622 0.370 0.547 MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570 OUTLINE AND MECHANICAL DATA 1.27 11.43 10.9 5.8 0 15.5 0.8 11.1 0.429 2.9 6.2 0.228 0.1 0.000 15.9 0.610 1.1 1.1 0.031 10° (max. 8° (max.10 0.050 0.450 0.437 0.114 0.244 0.004 0.626 0.043 0.043 JEDEC MO-166 0.394 (1 ”D and F” do not include mold flash or protrusio ns. - Mold flash or protrusions shall not exceed 0.15 mm (0.006”. - Critical dimensions: ”E”, ”G” and ”a3” PowerSO20 N N a2 b e A R c DETAIL B a1 E DETAIL A DETAIL A e3 H lead D a3 DETAIL B 20 11 GagePlane 0.35 slug -C- S E2 T E1 BOTTOM VIEW L SEATING PLANE G C (COPLANARITY E3 1 10 h x 45 PSO20MEC D1 12/13。