L298.PDF

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DUAL FULL-BRIDGE DRIVER
L298
. OPERATING SUPPLY VOLTAGE UP TO 46 V
DUAL FULL-BRIDGE DRIVER
. 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 independentlyof 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-
Multiwatt15
PowerSO20
ORDERING NUMBERS : 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.
BLOCK DIAGRAM
May 1995
1/12
. LOW SATURATION VOLTAGE
. TOTAL DC CURRENT UP TO 4 A
11016447.002.png
L298
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
s)
–Repetitive (80% on –20% off; t on = 10ms)
–DC Operation
m
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 stg ,T j
Storage and Junction Temperature
–40 to 150
°
C
PIN CONNECTIONS (top view)
15
CURRENT SENSING B
OUTPUT 4
OUTPUT 3
INPUT 4
14
13
12
11
ENABLE B
INPUT 3
LOGIC SUPPLY VOLTAGE V SS
GND
INPUT 1
ENABLE A
INPUT 1
SUPPLY VOLTAGE V S
OUTPUT 2
OUTPUT 1
CURRENT SENSING A
10
Multiwatt15
9
8
7
6
5
4
3
2
1
TAB CONNECTED TO PIN 8
D95IN240
GND
1
20
GND
Sense A
2
19
18
Sense B
N.C.
Out 1
3
N.C.
4
17
Out 4
Out 2
5
PowerSO20
16
Out 3
Input 4
V S
6
15
Input 1
Enable A
7
14
Enable B
8
9
13
Input 3
Input 2
12
VSS
GND
10
11
GND
D95IN239
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
2/12
Peak Output Current (each Channel)
– Non Repetitive (t = 100
11016447.003.png
L298
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.
4
6
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; unless otherwise 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
m
A
I iH
High Voltage Input Current
(pins 5, 7, 10, 12)
Vi = H
3
V SS –0.6V
30
100
m
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
m
A
I en = H High Voltage Enable Current
(pins 6, 11)
V en =H
3
V SS –0.6V
30
100
m
A
V CEsat (H) Source Saturation Voltage
I L =1A
I L =2A
1.35
2
1.7
2.7
V
V
V CEsat (L) Sink Saturation Voltage
I L = 1A (5)
I L = 2A (5)
1.2
1.7
1.6
2.3
V
V
V CEsat Total Drop
I L = 1A (5)
I L = 2A (5)
3.2
4.9
V
V
V sens Sensing Voltage (pins 1, 15)
–1 (1)
2
V
3/12
11016447.004.png
L298
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
T 1 (V i ) Source Current Turn-off Delay
0.5 V i to 0.9 I L (2); (4)
1.5
m
s
T 2 (V i ) Source Current Fall Time
0.9 I L to 0.1 I L (2); (4)
0.2
m
s
T 3 (V i ) Source Current Turn-on Delay
0.5 V i to 0.1 I L (2); (4)
2
m
s
T 4 (V i ) Source Current Rise Time
0.1 I L to 0.9 I L (2); (4)
0.7
m
s
T 5 (V i ) Sink Current Turn-off Delay
0.5 V i to 0.9 I L (3); (4)
0.7
m s
T 6 (V i ) Sink Current Fall Time
0.9 I L to 0.1 I L (3); (4)
0.25
m
s
T 7 (V i ) Sink Current Turn-on Delay
0.5 V i to 0.9 I L (3); (4)
1.6
m
s
T 8 (V i ) Sink Current Rise Time
0.1 I L to 0.9 I L (3); (4)
0.2
m
s
fc (V i ) Commutation Frequency
I L = 2A
25
40
KHz
T 1 (V en ) Source Current Turn-off Delay
0.5 V en to 0.9 I L (2); (4)
3
m
s
T 2 (V en ) Source Current Fall Time
0.9 I L to 0.1 I L (2); (4)
1
m
s
T 3 (V en ) Source Current Turn-on Delay
0.5 V en to 0.1 I L (2); (4)
0.3
m
s
T 4 (V en ) Source Current Rise Time
0.1 I L to 0.9 I L (2); (4)
0.4
m
s
T 5 (V en ) Sink Current Turn-off Delay
0.5 V en to 0.9 I L (3); (4)
2.2
m
s
T 6 (V en ) Sink Current Fall Time
0.9 I L to 0.1 I L (3); (4)
0.35
m
s
T 7 (V en ) Sink Current Turn-on Delay
0.5 V en to 0.9 I L (3); (4)
0.25
m
s
T 8 (V en ) Sink Current Rise Time
0.1 I L to 0.9 I L (3); (4)
0.1
m
s
fc (V en ) Commutation Frequency
I L = 2A
1
KHz
1) 1)Sensing voltage can be –1 V for t
3
50
m
sec; in steady state V sens min
.
– 0.5 V.
2) See fig. 2.
3) See fig. 4.
4) The load must be a pure resistor.
5) PIN 1 and PIN 15 connected to GND.
Figure 1 : Typical Saturation Voltage vs. Output
Current.
Figure 2 : Switching Times Test Circuits.
Note : For INPUT Switching, set EN = H
For ENABLE Switching, set IN = H
4/12
11016447.005.png
L298
Figure 3 : Source Current Delay Times vs. Input or Enable Switching.
Figure 4 : Switching Times Test Circuits.
Note : For INPUT Switching, set EN = H
For ENABLE Switching, set IN = L
5/12
11016447.001.png
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