Yupi

Solo disponible en BuenasTareas
  • Páginas : 12 (2784 palabras )
  • Descarga(s) : 0
  • Publicado : 8 de diciembre de 2010
Leer documento completo
Vista previa del texto
®

L298
DUAL FULL-BRIDGE DRIVER

. . . . .

OPERATING SUPPLY VOLTAGE UP TO 46 V TOTAL DC CURRENT UP TO 4 A LOW SATURATION VOLTAGE OVERTEMPERATURE PROTECTION LOGICAL "0" INPUT VOLTAGE UP TO 1.5 V (HIGH NOISE IMMUNITY)
Multiwatt15 PowerSO20

DESCRIPTION The L298 is an integrated monolithic circuit in a 15lead Multiwatt and PowerSO20 packages. It is a high voltage, high current dualfull-bridge driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors. Two enable inputs are provided to enable or disable the device independently of the input signals. The emitters of the lower transistors of each bridge are connected together and the corresponding external terminal can be used for the conBLOCK DIAGRAM

ORDERINGNUMBERS : L298N (Multiwatt Vert.) L298HN (Multiwatt Horiz.) L298P (PowerSO20)

nection of an external sensing resistor. An additional supply input is provided so that the logic works at a lower voltage.

Jenuary 2000

1/13

L298
ABSOLUTE MAXIMUM RATINGS
Symbol VS VSS VI,Ven IO Power Supply Logic Supply Voltage Input and Enable Voltage Peak Output Current (each Channel) – Non Repetitive(t = 100µs) –Repetitive (80% on –20% off; ton = 10ms) –DC Operation Sensing Voltage Total Power Dissipation (Tcase = 75°C) Junction Operating Temperature Storage and Junction Temperature Parameter Value 50 7 –0.3 to 7 3 2.5 2 –1 to 2.3 25 –25 to 130 –40 to 150 Unit V V V A A A V W °C °C

Vsens Ptot Top Tstg, Tj

PIN CONNECTIONS (top view)
15 14 13 12 11 10 CURRENT SENSING B OUTPUT 4 OUTPUT 3INPUT 4 ENABLE B INPUT 3 LOGIC SUPPLY VOLTAGE VSS GND INPUT 2 ENABLE A INPUT 1 SUPPLY VOLTAGE VS OUTPUT 2 OUTPUT 1 CURRENT SENSING A

Multiwatt15

9 8 7 6 5 4 3 2 1

TAB CONNECTED TO PIN 8

D95IN240A

GND Sense A N.C. Out 1 Out 2 VS Input 1 Enable A Input 2 GND

1 2 3 4 5 6 7 8 9 10
D95IN239

20 19 18 17

GND Sense B N.C. Out 4 Out 3 Input 4 Enable B Input 3 VSS GND

PowerSO2016 15 14 13 12 11

THERMAL DATA
Symbol Rth j-case Rth j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max. Max. PowerSO20 – 13 (*) Multiwatt15 3 35 Unit °C/W °C/W

(*) Mounted on aluminum substrate

2/13

L298
PIN FUNCTIONS (refer to the block diagram)
MW.15 1;15 2;3 4 PowerSO 2;19 4;5 6 Name Sense A; Sense B Out 1; Out 2 VS Function Between thispin and ground is connected the sense resistor to control the current of the load. Outputs of the Bridge A; the current that flows through the load connected between these two pins is monitored at pin 1. Supply Voltage for the Power Output Stages. A non-inductive 100nF capacitor must be connected between this pin and ground. TTL Compatible Inputs of the Bridge A. TTL Compatible Enable Input: the Lstate disables the bridge A (enable A) and/or the bridge B (enable B). Ground. Supply Voltage for the Logic Blocks. A100nF capacitor must be connected between this pin and ground. TTL Compatible Inputs of the Bridge B. Outputs of the Bridge B. The current that flows through the load connected between these two pins is monitored at pin 15. Not Connected

5;7 6;11 8 9 10; 12 13; 14 –

7;9 8;141,10,11,20 12 13;15 16;17 3;18

Input 1; Input 2 Enable A; Enable B GND VSS Input 3; Input 4 Out 3; Out 4 N.C.

ELECTRICAL CHARACTERISTICS (VS = 42V; VSS = 5V, Tj = 25°C; unless otherwise specified)
Symbol VS VSS IS Parameter Supply Voltage (pin 4) Logic Supply Voltage (pin 9) Quiescent Supply Current (pin 4) Test Conditions Operative Condition Ven = H; IL = 0 Vi = L Vi = H Vi = X Vi = L Vi =H Vi = X –0.3 2.3 Vi = L Vi = H ≤ VSS –0.6V –0.3 2.3 Ven = L Ven = H ≤ VSS –0.6V IL = 1A IL = 2A IL = 1A IL = 2A IL = 1A IL = 2A 0.95 (5) (5) (5) (5) 0.85 1.80 –1 (1) 30 1.35 2 1.2 1.7 30 Min. VIH +2.5 4.5 5 13 50 24 7 Typ. Max. 46 7 22 70 4 36 12 6 1.5 VSS –10 100 1.5 VSS –10 100 1.7 2.7 1.6 2.3 3.2 4.9 2 Unit V V mA mA mA mA mA mA V V µA µA V V µA µA V V V V V V V

ISS

Ven = L Quiescent...
tracking img