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l298中文资料 步进电机驱动
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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 designedto acceptstandardTTLlogic levels anddrive inductive loads such as relays, solenoids, DC and steppingmotors. Two enableinputs are providedto enableor disablethe deviceindependentlyof theinput signals. The emitters of the lower transistors of each bridge are connected togetherand the correspondingexternal terminal can be used for the connectionofanexternalsensingresistor. Anadditional supply input is provided so that the logic works at a lower voltage.
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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 SUPPLYVOLTAGEUP 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-
signedto acceptstandardTTL logiclevelsanddrive
inductive loads such as relays, solenoids, DC and
steppingmotors. Two enableinputsare providedto
enableor disablethe deviceindependentlyofthein-
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
supplyinput is provided so that the logic works at a
lower voltage.
PowerSO20
1/13
查询L298供应商
PIN CONNECTIONS
(top view)
GND
Input 2
VSS
N.C.
Out 1
V
S
Out 2
Input 1
Enable A
Sense A
GND 10
8
9
7
6
5
4
3
2
13
14
15
16
17
19
18
20
12
1
11
GND
D95IN239
Input 3
Enable B
Out 3
Input 4
Out 4
N.C.
Sense B
GND
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
Power Supply 50 V
V
SS
Logic Supply Voltage 7 V
V
I
,V
en
Input and Enable Voltage –0.3 to 7 V
I
O
Peak Output Current (each Channel)
– Non Repetitive (t = 100µs)
–Repetitive (80% on –20% off; t
on
= 10ms)
–DC Operation
3
2.5
2
A
A
A
V
sens
Sensing Voltage –1 to 2.3 V
P
tot Total Power Dissipation (T
case
=75°C)
25 W
T
op
Junction Operating Temperature –25 to 130 °
C
T
stg
,T
j
Storage and Junction Temperature –40 to 150
°C
THERMAL DATA
Symbol Parameter PowerSO20 Multiwatt15 Unit
R
th j-case
Thermal Resistance Junction-case Max. – 3
°C/W
R
th j-amb
Thermal Resistance Junction-ambient Max. 13 (*) 35 °
C/W
(*) Mounted on aluminum substrate
1
2
3
4
5
6
7
9
10
11
8
ENABLE B
INPUT 3
LOGIC SUPPLY VOLTAGE V
SS
GND
INPUT 2
ENABLE A
INPUT 1
SUPPLY VOLTAGE V
S
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
D95IN240A
Multiwatt15
PowerSO20
L298
2/13
PIN FUNCTIONS (referto 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
S
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
S
= 42V; V
SS
= 5V, T
j
=25°C; unlessotherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
S
Supply Voltage (pin 4) Operative Condition V
IH
+2.5 46 V
V
SS
Logic Supply Voltage (pin 9) 4.5 5 7 V
I
S
Quiescent Supply Current (pin 4) V
en
=H; I
L
=0 V
i
=L
V
i
=H
13
50
22
70
mA
mA
V
en
=L V
i
=X 4 mA
I
SS
Quiescent Current from V
SS
(pin 9) V
en
=H; I
L
=0 V
i
=L
V
i
=H
24
7
36
12
mA
mA
V
en
=L V
i
=X 6 mA
V
iL
Input Low Voltage
(pins 5, 7, 10, 12)
–0.3 1.5 V
V
iH
Input High Voltage
(pins 5, 7, 10, 12)
2.3 VSS V
I
iL
Low Voltage Input Current
(pins 5, 7, 10, 12)
V
i
= L –10
µ
A
I
iH
High Voltage Input Current
(pins 5, 7, 10, 12)
Vi = H
≤
V
SS
–0.6V
30 100 µ
A
V
en
= L Enable Low Voltage (pins 6, 11) –0.3 1.5 V
V
en
= H Enable High Voltage (pins 6, 11) 2.3 V
SS
V
I
en
= L Low Voltage Enable Current
(pins 6, 11)
V
en
= L –10
µ
A
I
en
= H High Voltage Enable Current
(pins 6, 11)
V
en
=H
≤
V
SS
–0.6V
30 100 µ
A
V
CEsat(H)
Source Saturation Voltage I
L
=1A
I
L
=2A
0.95 1.35
2
1.7
2.7
V
V
V
CEsat(L)
Sink Saturation Voltage I
L
= 1A (5)
I
L
= 2A (5)
0.85 1.2
1.7
1.6
2.3
V
V
V
CEsat
Total Drop I
L
= 1A (5)
I
L
= 2A (5)
1.80 3.2
4.9
V
V
V
sens
Sensing Voltage (pins 1, 15) –1 (1) 2 V
L298
3/13
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