L298直流电机驱动芯片英文资料资源-CSDN文库

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L298

Jenuary 2000

DUAL FULL-BRIDGE DRIVER

Multiwatt15

ORDERING NUMBERS :

L298N (Multiwatt Vert.)

L298HN (Multiwatt Horiz.)

L298P (PowerSO20)

BLOCK DIAGRAM

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)

DESCRIPTION

The L298 is an integrated monolithic circuit in a 15-

lead Multiwatt and PowerSO20 packages. It is a

high voltage, high current dual full-bridge driver de-

signed 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 in-

put signals. The emitters of the lower transistors of

each bridge are connected together and the corre-

sponding external terminal can be used for the con-

nection of an external sensing resistor. An additional

supply input is provided so that the logic works at a

lower voltage.

PowerSO20

1/13

PIN FUNCTIONS (refer to the block diagram)

MW.15 PowerSO Name Function

1;15 2;19 Sense A; Sense B Between this pin and ground is connected the sense resistor to

control the current of the load.

2;3 4;5 Out 1; Out 2 Outputs of the Bridge A; the current that flows through the load

connected between these two pins is monitored at pin 1.

46 V

Supply Voltage for the Power Output Stages.

A non-inductive 100nF capacitor must be connected between this

pin and ground.

5;7 7;9 Input 1; Input 2 TTL Compatible Inputs of the Bridge A.

6;11 8;14 Enable A; Enable B TTL Compatible Enable Input: the L state disables the bridge A

(enable A) and/or the bridge B (enable B).

8 1,10,11,20 GND Ground.

9 12 VSS Supply Voltage for the Logic Blocks. A100nF capacitor must be

connected between this pin and ground.

10; 12 13;15 Input 3; Input 4 TTL Compatible Inputs of the Bridge B.

13; 14 16;17 Out 3; Out 4 Outputs of the Bridge B. The current that flows through the load

connected between these two pins is monitored at pin 15.

– 3;18 N.C. Not Connected

ELECTRICAL CHARACTERISTICS (V

= 42V; V

= 5V, T

= 25°C; unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Supply Voltage (pin 4) Operative Condition V

+2.5 46 V

Logic Supply Voltage (pin 9) 4.5 5 7 V

Quiescent Supply Current (pin 4) V

= H; I

= 0 V

= L

= H

= L V

= X 4 mA

Quiescent Current from V

(pin 9) V

= H; I

= 0 V

= L

= H

= L V

= X 6 mA

Input Low Voltage

(pins 5, 7, 10, 12)

–0.3 1.5 V

Input High Voltage

(pins 5, 7, 10, 12)

2.3 VSS V

Low Voltage Input Current

(pins 5, 7, 10, 12)

= L –10

High Voltage Input Current

(pins 5, 7, 10, 12)

Vi = H

≤

–0.6V

30 100

= L Enable Low Voltage (pins 6, 11) –0.3 1.5 V

= H Enable High Voltage (pins 6, 11) 2.3 V

= L Low Voltage Enable Current

(pins 6, 11)

= L –10

= H High Voltage Enable Current

(pins 6, 11)

= H

≤

–0.6V

30 100

CEsat (H)

Source Saturation Voltage I

= 1A

= 2A

0.95 1.35

1.7

2.7

CEsat (L)

Sink Saturation Voltage I

= 1A (5)

= 2A (5)

0.85 1.2

1.7

1.6

2.3

CEsat

Total Drop I

= 1A (5)

= 2A (5)

1.80 3.2

4.9

sens

Sensing Voltage (pins 1, 15) –1 (1) 2 V

L298

3/13

剩余12页未读，继续阅读

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