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L298N

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L298

May 1995

DUAL FULL-BRIDGE DRIVER

Multiwatt15

ORDERING NUMBERS : L298N (Multiwatt Vert.)

L298HN (Multiwatt Horiz.)

L298P (PowerSO20)

BLOCK DIAGRAM

.OPERATING SUPPLY VOLTAGEUP 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 integratedmonolithic circuit in a 15-

lead Multiwatt and PowerSO20 packages. It is a

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

signedtoaccept standardTTL logic levels and drive

inductive loads such as relays, solenoids, DC and

steppingmotors. Two enableinputs are provided to

enableor disable thedevice independentlyofthein-

put signals. The emitters of the lower transistors of

each bridge are connected togetherand the corre-

spondingexternalterminal can be used for the con-

nectionofanexternalsensingresistor.Anadditional

supply input is provided so that the logic works at a

lower voltage.

PowerSO20

1/12

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 V

=X 4 mA

Quiescent Current from V

(pin 9) V

=H; I

=0 V

=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 µA

High Voltage Input Current

(pins 5, 7, 10, 12)

Vi = H ≤ V

–0.6V 30 100 µA

= 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 µA

= H High Voltage Enable Current

(pins 6, 11)

=H≤V

–0.6V 30 100 µA

CEsat (H)

Source Saturation Voltage I

=1A

=2A

1.35

1.7

2.7

CEsat (L)

Sink Saturation Voltage I

= 1A (5)

= 2A (5)

1.2

1.7

1.6

2.3

CEsat

Total Drop I

= 1A (5)

= 2A (5)

3.2

4.9

sens

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

L298

3/12

剩余11页未读，继续阅读

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eyyewardamon

2012-10-07

勉强可以，太繁杂了
伦敦蹦蹦猪

2014-06-11

勉强可以，太繁杂了

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