L298N.pdf

L298 May 1995 DUAL FULL-BRIDGE DRIVER Multiwatt15 ORDERING NUMBERS : L298N (Multiwatt Vert.) L298HN (Multiwatt Horiz.) L298P (PowerSO20) BLOCK DIAGRAM .OPERATINGSUPPLY VOLTAGEUP TO 46 V .TOTAL DC CURRENT UP TO 4 A .LOW SATURATION VOLTAGE .OVERTEMPERATUREPROTECTION .LOGICAL ”0” INPUT VOLTAGE UP TO 1.5 V (HIGH NOISEIMMUNITY) DESCRIPTION The L298is an integratedmonolithiccircuit ina 15- lead Multiwatt and PowerSO20 packages. It is a high voltage,high current dualfull-bridgedriver de- signedtoacceptstandardTTLlogiclevels anddrive inductive loads such as relays, solenoids, DC and steppingmotors.Twoenableinputsare provided to enableordisablethedeviceindependentlyofthein- put signals. Theemitters of the lower transistorsof each bridgeare connectedtogetherand the corre- spondingexternalterminalcanbe used forthecon- nectionofanexternalsensingresistor.Anadditional supplyinput is providedso thatthe logic works at a lower voltage. PowerSO20 1/12 PIN CONNECTIONS (top view) GND Input 2VSS N.C. Out 1 VS Out 2 Input 1 Enable A Sense A GND10 8 9 7 6 5 4 3 2 13 14 15 16 17 19 18 20 12 1 11GND D95IN239 Input 3 Enable B Out 3 Input 4 Out 4 N.C. Sense B GND ABSOLUTE MAXIMUM RATINGS SymbolParameterValueUnit VSPower Supply50V VSSLogic Supply Voltage7V VI,VenInput and Enable Voltage0.3 to 7V IOPeak Output Current (each Channel) NonRepetitive (t = 100s) Repetitive (80% on 20% off; ton= 10ms) DC Operation 3 2.5 2 A A A VsensSensingVoltage1 to 2.3V PtotTotal Power Dissipation (Tcase= 75C)25W Tstg, TjStorage and Junction Temperature40 to 150C THERMAL DATA SymbolParameterPowerSO20Multiwatt15Unit Rth j-caseThermalResistance Junction-caseMax.3C/W Rth j-ambThermalResistance Junction-ambientMax.13 (*)35C/W (*) Mounted on aluminum substrate 1 2 3 4 5 6 7 9 10 11 8 ENABLE B INPUT 3 LOGIC SUPPLY VOLTAGE VSS GND INPUT 1 ENABLE A INPUT 1 SUPPLY VOLTAGE VS OUTPUT 2 OUTPUT 1 CURRENT SENSING A TAB CONNECTED TO PIN 8 13 14 15 12 CURRENT SENSING B OUTPUT 4 OUTPUT 3 INPUT 4 D95IN240 Multiwatt15 PowerSO20 L298 2/12 PIN FUNCTIONS (refer to the block diagram) MW.15PowerSONameFunction 1;152;19Sense A; Sense BBetween 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. 46VSSupply 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 (enable B). 81,10,11,20GNDGround. 912VSSSupply 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 Connected ELECTRICALCHARACTERISTICS (VS=42V; VSS= 5V, Tj= 25C; unlessotherwise specified) SymbolParameterTest ConditionsMin.Typ.Max.Unit VSSupplyVoltage (pin 4)Operative ConditionVIH+2.546V VSSLogic Supply Voltage (pin 9)4.557V ISQuiescent Supply Current (pin 4)Ven= H;IL= 0Vi= L Vi= H 13 50 22 70 mA mA Ven= LVi= X4mA ISSQuiescent Current from VSS(pin 9) Ven= H;IL= 0Vi= L Vi= H 24 7 36 12 mA mA Ven= LVi= X6mA ViLInput Low Voltage (pins 5, 7, 10, 12) 0.31.5V ViHInput High Voltage (pins 5, 7, 10, 12) 2.3VSSV IiLLow Voltage Input Current (pins 5, 7, 10, 12) Vi= L10A IiHHigh Voltage Input Current (pins 5, 7, 10, 12) Vi = H VSS0.6V30100A Ven= LEnable Low Voltage(pins 6, 11)0.31.5V Ven=HEnable High Voltage (pins 6, 11)2.3VSSV Ien= LLow Voltage Enable Current (pins 6, 11) Ven= L10A Ien= HHigh Voltage Enable Current (pins 6, 11) Ven= H VSS0.6V30100A VCEsat (H)SourceSaturation VoltageIL= 1A IL= 2A 1.35 2 1.7 2.7 V V VCEsat(L)SinkSaturation VoltageIL= 1A(5) IL= 2A(5) 1.2 1.7 1.6 2.3 V V VCEsatTotal DropIL= 1A(5) IL= 2A(5) 3.2 4.9 V V VsensSensing Voltage (pins 1, 15)1(1)2V L298 3/12 Figure1 : TypicalSaturation Voltage vs. Output Current. Figure 2 : Switching Times Test Circuits. Note : For INPUT Switching, set EN =H For ENABLESwitching, setIN = H 1) 1)Sensing voltage can be 1 V fort 50 sec; in steady state Vsensmin 0.5 V. 2) Seefig. 2. 3) Seefig. 4. 4) Theload must be a pureresistor. 5) PIN 1 and PIN 15 connected to GND. ELECTRICALCHARACTERISTICS (continued) SymbolParameterTest ConditionsMin.Typ.Max.Unit T1(Vi)SourceCurrent Turn-off Delay0.5 Vito 0.9 IL(2);(4)1.5s T2(Vi)SourceCurrent Fall Time0.9 ILto 0.1 IL(2);(4)0.2s T3(Vi)SourceCurrent Turn-on Delay0.5 Vito 0.1 IL(2);(4)2s T4(Vi)SourceCurrent Rise Time0.1 ILto 0.9 IL(2);(4)0.7s T5(Vi)SinkCurrent Turn-off Delay0.5 Vito 0.9 IL(3);(4)0.7s T6(Vi)SinkCurrent Fall Time0.9 ILto 0.1 IL(3);(4)0.25s T7(Vi)SinkCurrent Turn-on Delay0.5 Vito 0.9 IL(3);(4)1.6s T8(Vi)SinkCurrent Rise Time0.1 ILto 0.9 IL(3);(4)0.2s fc (Vi)Commutation FrequencyIL= 2A2540KHz T1(Ven)SourceCurrent Turn-off Delay0.5 Vento0.9 IL(2); (4)3s T2(Ven)SourceCurrent Fall Time0.9 ILto 0.1 IL(2);(4)1s T3(Ven)SourceCurrent Turn-on Delay0.5 Vento0.1 IL(2); (4)0.3s T4(Ven)SourceCurrent Rise Time0.1 ILto 0.9 IL(2);(4)0.4s T5(Ven)SinkCurrent Turn-off Delay0.5 Vento0.9 IL(3); (4)2.2s T6(Ven)SinkCurrent Fall Time0.9 ILto 0.1 IL(3);(4)0.35s T7(Ven)SinkCurrent Turn-on Delay0.5 Vento0.9 IL(3); (4)0.25s T8(Ven)SinkCurrent Rise Time0.1 ILto 0.9 IL(3);(4)0.1s fc (Ven)Commutation FrequencyIL= 2A1KHz L298 4/12 Figure3 : Source Current Delay Times vs. Input orEnableSwitching. Figure4 : SwitchingTimes Test Circuits. Note : For INPUT Switching,set EN = H For ENABLE Switching, set IN = L L298 5/12 Figure5 : SinkCurrentDelay Times vs. Input 0V EnableSwitching. Figure6 : BidirectionalDC Motor Control. L =LowH =HighX = Dontcare InputsFunction Ven= HC = H ; D = LTurn Right C = H ; D = HTurn Left C = DFast Motor Stop Ven= LC = X ;D = CFree Running Motor Stop L298 6/12 Figure7 : For higher currents,outputscan be paralleled. Takecare to parallel channel1 with channel4 andchannel2 with channel3. APPLICATION INFORMATION (Refer to the block diagram) 1.1. POWEROUTPUT STAGE TheL298integratestwopoweroutputstages(A;B). The power output stage is a bridge configuration and its outputscan drive an inductiveload in com- monor differenzialmode,dependingon thestateof the inputs. The current that flows through the load comesout from the bridge at the sense output: an externalresistor (RSA;RSB.)allows to detectthein- tensityof this current. 1.2. INPUT STAGE Eachbridgeis driven bymeans offourgatesthe in- put of which are In1 ; In2; EnAand In3 ; In4 ; EnB. TheIninputssetthebridgestatewhenThe Eninput ishigh;alowstateoftheEninputinhibitsthebridge. Allthe inputsare TTL compatible. 2. SUGGESTIONS A non inductive capacitor, usually of 100 nF, must be foreseen between both Vs and Vss, to ground, asnearas possibletoGND pin.Whenthe largeca- pacitorof the power supplyis too far from the IC, a second smaller one must be foreseen near the L298. The senseresistor, not ofa wire wound type, must be groundednearthenegativepoleof Vsthatmust be near the GNDpin of the I.C. Eachinput must be connectedto the sourceof the driving signals bymeansof a very shortpath. Turn-OnandTurn-Off :BeforetoTurn-ON the Sup- plyVoltageandbeforetoTurnitOFF,theEnablein- put must be driven to the Lowstate. 3. APPLICATIONS Fig 6 shows abidirectionalDC motor control Sche- matic Diagram forwhich onlyonebridge is needed. The externalbridge of diodesD1 to D4 is madeby four fast recovery elements (trr 200 nsec) that must be chosen of a VF as low as possible at the worst case ofthe load current. Thesenseoutputvoltagecanbeusedtocontrolthe current amplitudeby choppingthe inputs,orto pro- vide overcurrentprotectionbyswitching low theen- ableinput. The brake function (Fast motor stop) requires that the Absolute Maximum Rating of 2 Amps must neverbe overcome. When the repetitivepeak current neededfrom the loadis higher than 2 Amps,a paralleled configura- tion can be chosen (See Fig.7). An external bridge of diodes are required when in- ductiveloads are driven and whenthe inputs of the ICarechopped;Shottkydiodeswouldbepreferred. L298 7/12 Thissolutioncandriveuntil 3Amps InDCoperation anduntil3.5 Amps of a repetitivepeakcurrent. OnFig8itisshownthedrivingofatwophasebipolar steppermotor ; the needed signals to drive the in- puts of the L298 are generated, in this example, from the IC L297. Fig 9 showsan exampleof P.C.B.designed forthe applicationof Fig 8. Fig 10 shows a secondtwo phase bipolar stepper motor controlcircuit where the currentis controlled by theI.C. L6506. Figure8 : Two Phase Bipolar Stepper MotorCircuit. Thiscircuit drivesbipolar steppermotors with winding currents up to 2 A. The diodes are fast 2 A types. RS1= RS2= 0.5 D1 toD8 = 2A Fast diodes VF 1.2 V I = 2 A trr 200 ns L298 8/12 Figure9 : SuggestedPrinted Circuit BoardLayoutfor the Circuit of fig. 8 (1:1scale). Figure10 : Two PhaseBipolar StepperMotor ControlCircuit byUsing the Current Controller L6506. RRand Rsensedepend fromthe load current L298 9/12 MULTIWATT15 (VERTICAL) PACKAGE MECHANICAL DATA DIM. mminch MIN.TYP.MAX.MIN.TYP.MAX. A50.197 B2.650.104 C1.60.063 D10.039 E0.490.550.0190.022 F0.660.750.0260.030 G1.141.271.40.0450.0500.055 G117.5717.7817.910.6920.7000.705 H119.60.772 H220.20.795 L22.122.60.8700.890 L12222.50.8660.886 L217.6518.10.6950.713 L317.2517.517.750.6790.6890.699 L410.310.710.90.4060.4210.429 L72.652.90.1040.114 M4.24.34.60.1650.1690.181 M14.55.085.30.1770.2000.209 S1.92.60.0750.102 S11.92.60.0750.102 Dia13.653.850.1440.152 L298 10/12 PowerSO20 PACKAGE MECHANICAL DATA DIM. mminch MIN.TYP.MAX.MIN.TYP.MAX. A3.600.1417 a10.100.300.00390.0118 a23.300.1299 a300.1000.0039 b0.400.530.01570.0209 c0.230.320.0090.0126 D (1)15.8016.000.62200.6299 E13.9014.500.54720.570 e1.270.050 e311.430.450 E1 (1)10.9011.100.42910.437 E22.900.1141 G00.1000.0039 h1.10 L0.801.100.03140.0433 N10 (max.) S8 (max.) T10.00.3937 (1) ”D and E1” do not include mold flash or protrusions - Mold flash or protrusions shall notexceed 0.15mm (0.006”) e a2A E a1 PSO20MEC DETAILA T D 110 1120 E1E2 h x 45 DETAILA lead slug a3 S Gage Plan e 0.35 L DETAILB R