L298 [STMICROELECTRONICS]
DUAL FULL-BRIDGE DRIVER; 双路全桥式驱动器
| 型号： | L298 |
| 厂家： | 
ST |
| 描述： | DUAL FULL-BRIDGE DRIVER |
| 文件： | 总13页 (文件大小：187K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
L298
DUAL FULL-BRIDGE DRIVER
.
.
.
.
.
OPERATINGSUPPLY 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
PowerSO20
Multiwatt15
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 acceptstandardTTLlogiclevelsanddrive
inductive loads such as relays, solenoids, DC and
steppingmotors. Two enableinputsare providedto
enableordisablethe deviceindependentlyofthein-
put signals. The emitters of the lower transistors of
each bridge are connected togetherand the corre-
spondingexternalterminal can be used for thecon-
ORDERING NUMBERS : L298N (Multiwatt Vert.)
L298HN (Multiwatt Horiz.)
L298P (PowerSO20)
nectionofanexternalsensingresistor.Anadditional
supplyinput is providedso that the logic works at a
lower voltage.
BLOCK DIAGRAM
Jenuary 2000
1/13
L298
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
50
Unit
V
VS
VSS
VI,Ven
IO
Power Supply
Logic Supply Voltage
Input and Enable Voltage
7
V
–0.3 to 7
V
Peak Output Current (each Channel)
– Non Repetitive (t = 100µs)
–Repetitive (80% on –20% off; ton = 10ms)
–DC Operation
3
2.5
2
A
A
A
Vsens
Ptot
Sensing Voltage
–1 to 2.3
25
V
W
Total Power Dissipation (Tcase = 75°C)
Junction Operating Temperature
Storage and Junction Temperature
Top
–25 to 130
–40 to 150
°
C
Tstg, Tj
°C
PIN CONNECTIONS
(top view)
CURRENT SENSING B
15
14
13
12
11
10
9
OUTPUT 4
OUTPUT 3
INPUT 4
ENABLE B
INPUT 3
LOGIC SUPPLY VOLTAGE VSS
GND
Multiwatt15
8
7
INPUT 2
6
ENABLE A
5
INPUT 1
4
SUPPLY VOLTAGE VS
OUTPUT 2
3
2
OUTPUT 1
1
CURRENT SENSING A
TAB CONNECTED TO PIN 8
D95IN240A
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND
GND
Sense A
N.C.
Sense B
N.C.
Out 4
Out 1
PowerSO20
Out 2
Out 3
VS
Input 4
Enable B
Input 3
VSS
Input 1
Enable A
Input 2
GND
GND
D95IN239
THERMAL DATA
Symbol
Parameter
PowerSO20
Multiwatt15
Unit
Rth j-case
Rth j-amb
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Max.
Max.
–
3
°C/W
13 (*)
35
°
C/W
(*) Mounted on aluminum substrate
2/13
L298
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
4;5
6
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.
VS
Supply Voltage for the Power Output Stages.
A non-inductive 100nF capacitor must be connected between this
pin and ground.
5;7
7;9
Input1; Input 2
TTL Compatible Inputs of the Bridge A.
6;11
8;14
Enable A; EnableB TTL Compatible Enable Input: the L state disables the bridge A
(enable A) and/or the bridge B (enable B).
8
9
1,10,11,20
12
GND
VSS
Ground.
Supply Voltage for the Logic Blocks. A100nF capacitor must be
connected between this pin and ground.
10; 12
13; 14
13;15
16;17
Input3; Input 4
Out 3; Out 4
TTL Compatible Inputs of the Bridge B.
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 (VS = 42V; VSS = 5V, Tj = 25°C; unlessotherwise specified)
Symbol
Parameter
Test Conditions
Operative Condition
Min.
VIH +2.5
4.5
Typ.
Max.
46
Unit
V
VS
VSS
IS
Supply Voltage (pin 4)
Logic Supply Voltage (pin 9)
Quiescent Supply Current (pin 4)
5
7
V
Ven = H; IL = 0
Ven = L
Vi = L
Vi = H
13
50
22
70
mA
mA
Vi = X
4
mA
ISS
Quiescent Current from VSS (pin 9) Ven = H; IL = 0
Vi = L
Vi = H
24
7
36
12
mA
mA
Ven = L
Vi = X
6
mA
V
ViL
ViH
IiL
Input Low Voltage
(pins 5, 7, 10, 12)
–0.3
2.3
1.5
Input High Voltage
(pins 5, 7, 10, 12)
VSS
–10
100
V
Low Voltage Input Current
(pins 5, 7, 10, 12)
Vi = L
Vi = H
A
A
µ
µ
IiH
High Voltage Input Current
(pins 5, 7, 10, 12)
30
30
V
SS –0.6V
≤
V
en = L Enable Low Voltage (pins 6, 11)
–0.3
2.3
1.5
VSS
–10
V
Ven = H Enable High Voltage (pins 6, 11)
V
Ien = L Low Voltage Enable Current
(pins 6, 11)
Ven = L
Ven = H
A
µ
I
en = H High Voltage Enable Current
(pins 6, 11)
100
µ
V
SS –0.6V
A
≤
VCEsat(H) Source Saturation Voltage
VCEsat(L) Sink Saturation Voltage
VCEsat TotalDrop
IL = 1A
IL = 2A
0.95
0.85
1.35
2
1.7
2.7
V
V
IL = 1A (5)
IL = 2A (5)
1.2
1.7
1.6
2.3
V
V
IL = 1A (5)
IL = 2A (5)
1.80
3.2
4.9
V
V
Vsens
Sensing Voltage (pins 1, 15)
–1 (1)
2
V
3/13
L298
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
1.5
0.2
2
Max.
Unit
T1 (Vi) Source Current Turn-off Delay
T2 (Vi) Source Current Fall Time
T3 (Vi) Source Current Turn-on Delay
T4 (Vi) Source Current Rise Time
T5 (Vi) Sink Current Turn-off Delay
T6 (Vi) Sink Current Fall Time
0.5 Vi to 0.9IL
(2); (4)
(2); (4)
(2); (4)
(2); (4)
(3); (4)
(3); (4)
(3); (4)
(3); (4)
µs
0.9 IL to 0.1 IL
0.5 Vi to 0.1IL
0.1 IL to 0.9 IL
0.5 Vi to 0.9IL
0.9 IL to 0.1 IL
0.5 Vi to 0.9IL
0.1 IL to 0.9 IL
IL = 2A
s
µ
µs
0.7
0.7
0.25
1.6
0.2
25
s
s
s
s
µ
µ
µ
µ
T7 (Vi) Sink Current Turn-on Delay
T8 (Vi) Sink Current Rise Time
µs
KHz
µs
fc (Vi) Commutation Frequency
T1 (Ven) Source Current Turn-off Delay
T2 (Ven) Source Current Fall Time
T3 (Ven) Source Current Turn-on Delay
T4 (Ven) Source Current Rise Time
T5 (Ven) Sink Current Turn-off Delay
T6 (Ven) Sink Current Fall Time
40
0.5 Ven to 0.9 IL
0.9 IL to 0.1 IL
0.5 Ven to 0.1 IL
0.1 IL to 0.9 IL
0.5 Ven to 0.9 IL
0.9 IL to 0.1 IL
0.5 Ven to 0.9 IL
0.1 IL to 0.9 IL
(2); (4)
(2); (4)
(2); (4)
(2); (4)
(3); (4)
(3); (4)
(3); (4)
(3); (4)
3
1
s
µ
0.3
0.4
2.2
0.35
0.25
0.1
µs
s
µ
µs
s
s
s
µ
µ
µ
T7 (Ven) Sink Current Turn-on Delay
T8 (Ven) Sink Current Rise Time
1) 1)Sensing voltage can be –1 V for t 50 sec; in steady state V
min –0.5 V.
≥
≤
µ
sens
2) See fig. 2.
3) See fig. 4.
4) The loadmust be a pureresistor.
Figure 1 : Typical SaturationVoltagevs. Output
Figure 2 : Switching Times Test Circuits.
Current.
Note : For INPUT Switching, set EN = H
For ENABLESwitching, set IN = H
4/13
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 ENABLESwitching, set IN = L
5/13
L298
Figure 5 :
Sink Current Delay Times vs. Input 0 V EnableSwitching.
Figure 6 : Bidirectional DC Motor Control.
Inputs
C = H ; D = L
Function
Forward
Ven = H
Ven = L
C = L ; D = H
C = D
Reverse
Fast Motor Stop
C = X ; D = X
Free Running
Motor Stop
L = Low
H =High
X = Don’tcare
6/13
L298
Figure 7 : For higher currents, outputscan be paralleled. Take care to parallel channel 1 with channel4
and channel2 with channel3.
APPLICATION INFORMATION (Refer to the block diagram)
1.1. POWER OUTPUT STAGE
Each input must be connected to the source of the
driving signals by means of a very short path.
TheL298integratestwopoweroutputstages(A; B).
The power output stage is a bridge configuration
and its outputscan drive an inductive load in com-
monor differenzialmode, dependingon thestateof
the inputs. The current that flows through the load
comes out from the bridge at the sense output: an
externalresistor (RSA ;RSB.) allows todetectthe in-
tensityof this current.
Turn-OnandTurn-Off: Beforeto Turn-ONthe Sup-
plyVoltageand beforeto TurnitOFF,theEnablein-
put must be driven to the Low state.
3. APPLICATIONS
Fig 6 showsa bidirectionalDC motor controlSche-
maticDiagram forwhich only onebridgeis needed.
The externalbridge of diodesD1 to D4 is made by
four fast recovery elements (trr ≤ 200 nsec) that
must be chosen of a VF as low as possible at the
worst case of the load current.
1.2. INPUT STAGE
Eachbridgeis driven bymeansof fourgatesthe in-
put of which are In1 ; In2 ; EnA and In3 ; In4 ; EnB.
TheIninputssetthebridgestatewhenTheEn input
ishigh;a lowstateoftheEninputinhibitsthebridge.
All the inputs are TTL compatible.
Thesenseoutputvoltagecanbeusedtocontrolthe
currentamplitude by chopping the inputs,or to pro-
videovercurrent protectionbyswitching low theen-
able input.
2. SUGGESTIONS
The brake function (Fast motor stop) requires that
the Absolute Maximum Rating of 2 Amps must
neverbe overcome.
A non inductive capacitor, usually of 100 nF, must
be foreseen between both Vs and Vss, to ground,
as nearas possible toGND pin. Whenthe large ca-
pacitorof the powersupply is too far from the IC, a
second smaller one must be foreseen near the
L298.
When the repetitive peak current needed from the
load is higher than 2 Amps,a paralleled configura-
tion can be chosen(See Fig.7).
The sense resistor, not of a wire wound type, must
be groundednear the negativepoleof Vs thatmust
be nearthe GND pin of the I.C.
An external bridge of diodes are required when in-
ductive loads are driven and when the inputsof the
ICarechopped; Shottkydiodeswouldbepreferred.
7/13
L298
Thissolutioncandriveuntil3 AmpsInDCoperation
and until 3.5 Amps of a repetitivepeak current.
Fig 10 shows a second two phase bipolar stepper
motor control circuit where the current is controlled
by the I.C. L6506.
OnFig8itisshownthedrivingofa twophasebipolar
stepper motor ; the needed signals to drive the in-
puts of the L298 are generated, in this example,
from the IC L297.
Fig 9 showsan exampleof P.C.B. designedforthe
application of Fig 8.
Figure 8 :
Two Phase Bipolar Stepper MotorCircuit.
This circuit drives bipolar steppermotorswith winding currents up to 2 A. The diodesare fast 2 A types.
RS1 = RS2 = 0.5
Ω
VF ≤ 1.2 V @ I = 2 A
D1 to D8 = 2 A Fast diodes
{
trr 200 ns
≤
8/13
L298
Figure 9 : SuggestedPrinted Circuit Board Layout for the Circuit of fig. 8 (1:1 scale).
Figure 10 : Two Phase Bipolar StepperMotor Control Circuit by Using the Current ControllerL6506.
RR and Rsense depend from the load current
9/13
L298
mm
inch
DIM.
OUTLINE AND
MIN. TYP. MAX. MIN. TYP. MAX.
MECHANICAL DATA
A
B
5
0.197
0.104
0.063
2.65
1.6
C
D
1
0.039
E
0.49
0.66
1.02
0.55 0.019
0.75 0.026
0.022
0.030
F
G
1.27
1.52 0.040 0.050 0.060
G1
H1
H2
L
17.53 17.78 18.03 0.690 0.700 0.710
19.6
0.772
20.2
0.795
21.9
21.7
22.2
22.1
22.5 0.862 0.874 0.886
22.5 0.854 0.870 0.886
L1
L2
L3
L4
L7
M
17.65
18.1 0.695
0.713
17.25 17.5 17.75 0.679 0.689 0.699
10.3
2.65
4.25
4.63
1.9
10.7
10.9 0.406 0.421 0.429
2.9 0.104 0.114
4.55
5.08
4.85 0.167 0.179 0.191
5.53 0.182 0.200 0.218
M1
S
2.6
2.6
0.075
0.075
0.102
0.102
0.152
S1
Dia1
1.9
Multiwatt15 V
3.65
3.85 0.144
10/13
L298
mm
inch
DIM.
OUTLINE AND
MIN. TYP. MAX. MIN. TYP. MAX.
MECHANICAL DATA
A
B
5
0.197
0.104
0.063
0.022
0.030
2.65
C
1.6
E
0.49
0.66
1.14
0.55 0.019
0.75 0.026
F
G
1.27
1.4
0.045 0.050 0.055
G1
H1
H2
L
17.57 17.78 17.91 0.692 0.700 0.705
19.6 0.772
20.2
0.795
20.57
18.03
2.54
0.810
0.710
0.100
L1
L2
L3
L4
L5
L6
L7
S
17.25 17.5 17.75 0.679 0.689 0.699
10.3
10.7
5.28
2.38
10.9 0.406 0.421 0.429
0.208
0.094
2.65
1.9
2.9
2.6
2.6
0.104
0.075
0.075
0.114
0.102
0.102
0.152
Multiwatt15 H
S1
Dia1
1.9
3.65
3.85 0.144
11/13
L298
mm
inch
DIM.
OUTLINE AND
MECHANICAL DATA
MIN. TYP. MAX. MIN. TYP. MAX.
A
a1
a2
a3
b
3.6
0.3
3.3
0.1
0.142
0.012
0.130
0.004
0.021
0.013
0.630
0.386
0.570
0.1
0.004
0.000
0
0.4
0.53 0.016
0.32 0.009
c
0.23
D (1) 15.8
16
0.622
0.370
D1
E
9.4
9.8
13.9
14.5 0.547
e
1.27
0.050
0.450
e3
11.43
E1 (1) 10.9
E2
11.1 0.429
2.9
0.437
0.114
0.244
0.004
0.626
0.043
0.043
E3
G
H
h
5.8
0
6.2
0.1
0.228
0.000
15.5
15.9 0.610
1.1
JEDEC MO-166
L
0.8
1.1
0.031
N
S
T
10° (max.)
8° (max.)
10
0.394
PowerSO20
(1) ”D andF” do not include mold flash or protrusions.
- Moldflash or protrusions shall not exceed 0.15 mm (0.006”).
- Criticaldimensions: ”E”, ”G” and ”a3”
R
N
N
a2
A
c
a1
b
e
DETAIL B
DETAIL A
e3
E
DETAIL A
lead
H
D
slug
a3
DETAIL B
20
11
0.35
Gage Plane
- C -
S
SEATING PLANE
L
G
C
BOTTOM VIEW
(COPLANARITY)
E2
E1
T
E3
1
10
D1
PSO20MEC
h x 45
12/13
L298
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license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this
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13/13
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