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美国德州仪器(Texas Instruments)生产的微型电机驱动集成电路芯片,支持Vcc 4.5~36V,最大输出电流为1A。由于其驱动能力有限,多应用于小型机器。
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L293, L293D
QUADRUPLE HALF-H DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D Featuring Unitrode L293 and L293D
Products Now From Texas Instruments
D Wide Supply-Voltage Range: 4.5 V to 36 V
D Separate Input-Logic Supply
D Internal ESD Protection
D Thermal Shutdown
D High-Noise-Immunity Inputs
D Functionally Similar to SGS L293 and
SGS L293D
D Output Current 1 A Per Channel
(600 mA for L293D)
D Peak Output Current 2 A Per Channel
(1.2 A for L293D)
D Output Clamp Diodes for Inductive
Transient Suppression (L293D)
description/ordering information
The L293 and L293D are quadruple high-current
half-H drivers. The L293 is designed to provide
bidirectional drive currents of up to 1 A at voltages
from 4.5 V to 36 V. The L293D is designed to
provide bidirectional drive currents of up to
600-mA at voltages from 4.5 V to 36 V. Both
devices are designed to drive inductive loads such
as relays, solenoids, dc and bipolar stepping
motors, as well as other high-current/high-voltage
loads in positive-supply applications.
All inputs are TTL compatible. Each output is a
complete totem-pole drive circuit, with a
Darlington transistor sink and a pseudo-
Darlington source. Drivers are enabled in pairs, with drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4
enabled by 3,4EN. When an enable input is high, the associated drivers are enabled, and their outputs are active
and in phase with their inputs. When the enable input is low, those drivers are disabled, and their outputs are
off and in the high-impedance state. With the proper data inputs, each pair of drivers forms a full-H (or bridge)
reversible drive suitable for solenoid or motor applications.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
HSOP (DWP) Tube of 20 L293DWP L293DWP
0°Cto70°C
PDIP (N) Tube of 25 L293N L293N
0°C to 70°C
PDIP (NE)
Tube of 25 L293NE L293NE
PDIP (NE)
Tube of 25 L293DNE L293DNE
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Copyright 2004, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
HEAT SINK AND
GROUND
HEAT SINK AND
GROUND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1,2EN
1A
1Y
2Y
2A
V
CC2
V
CC1
4A
4Y
3Y
3A
3,4EN
L293 ...N OR NE PACKAGE
L293D . . . NE PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1,2EN
1A
1Y
NC
NC
NC
NC
NC
2Y
2A
V
CC2
V
CC1
4A
4Y
NC
NC
NC
NC
NC
3Y
3A
3,4EN
L293 . . . DWP PACKAGE
(TOP VIEW)
HEAT SINK AND
GROUND
HEAT SINK AND
GROUND
L293, L293D
QUADRUPLE HALF-H DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information (continued)
On the L293, external high-speed output clamp diodes should be used for inductive transient suppression.
A V
CC1
terminal, separate from V
CC2
, is provided for the logic inputs to minimize device power dissipation.
The L293and L293D are characterized for operation from 0°C to 70°C.
block diagram
1
0
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
1
0
1
1
0
2
4
3
M
M
M
1
0
1
0
1
0
V
CC2
V
CC1
NOTE: Output diodes are internal in L293D.
FUNCTION TABLE
(each driver)
INPUTS
†
OUTPUT
A EN
OUTPUT
Y
H H H
L HL
X L Z
H = high level, L = low level, X = irrelevant,
Z = high impedance (off)
†
In the thermal shutdown mode, the output is
in the high-impedance state, regardless of
the input levels.
L293, L293D
QUADRUPLE HALF-H DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
2
1
7
10
9
15
3
6
11
14
1A
1,2EN
2A
3A
3,4EN
4A
1Y
2Y
3Y
4Y
schematics of inputs and outputs (L293)
Input
V
CC2
Output
GND
TYPICAL OF ALL OUTPUTS
EQUIVALENT OF EACH INPUT
V
CC1
Current
Source
GND
L293, L293D
QUADRUPLE HALF-H DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs (L293D)
Input
V
CC2
Output
GND
TYPICAL OF ALL OUTPUTS
EQUIVALENT OF EACH INPUT
V
CC1
Current
Source
GND
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC1
(see Note 1) 36 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output supply voltage, V
CC2
36 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
−3 V to V
CC2
+ 3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak output current, I
O
(nonrepetitive, t ≤ 5 ms): L293 ±2 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak output current, I
O
(nonrepetitive, t ≤ 100 µs): L293D ±1.2 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
: L293 ±1 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
: L293D ±600 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Notes 2 and 3): DWP package TBD°C/W. . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .
NE package TBD°C/W. . . . . . . . . . . . . . . . . . . . . . . . .
Maximum junction temperature, T
J
150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to the network ground terminal.
2. Maximum power dissipation is a function of T
J
(max), q
JA
, and T
A
. The maximum allowable power dissipation at any allowable
ambient temperature is P
D
= (T
J
(max) − T
A
)/q
JA
. Operating at the absolute maximum T
J
of 150°C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
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