L298电机驱动芯片资料
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L298
Jenuary 2000DUAL FULL-BRIDGE DRIVER
Multiwatt15
ORDERING NUMBERS :L298N (MultiwattVert.
L298HN (MultiwattHoriz. L298P (PowerSO20
BLOCK DIAGRAM
. OPERATING SUPPLY VOLTAGE UP TO 46V . TOTAL DC CURRENT UP TO 4A . LOW SATURATION VOLTAGE
. OVERTEMPERATURE PROTECTION
.
LOGICAL ”0”INPUT VOLTAGE UP TO 1.5V (HIGHNOISE IMMUNITY
DESCRIPTION
The L298is an integrated monolithic circuit in a 15-lead Multiwatt and
PowerSO20packages. It is a high voltage, high current dual full-bridge driver de-signedto acceptstandardTTL logic levels anddrive inductive loads such as relays, solenoids, DC and steppingmotors. Two enableinputs are provided to enableor disablethe deviceindependentlyof thein-put signals. The emitters of the lower transistors of each bridge are connected togetherand the corre-sponding external terminal can be used for the con-nectionof an externalsensing resistor.Anadditional supply input is provided so that the logic works at a lower voltage.
PowerSO20
®
1/13
PIN CONNECTIONS (topview
GND Input 2VSS N.C. Out 1V S Out 2Input 1Enable A Sense A
GND
10
897654321314151617
19182012111
GND
D95IN239
Input 3Enable B Out 3Input 4Out 4N.C. Sense B GND ABSOLUTE MAXIMUM RATINGS
Symbol Parameter
Value Unit V S Power Supply 50V V SS Logic Supply Voltage 7V V I ,V en Input and Enable Voltage
–0.3to 7V I O
Peak Output Current (eachChannel –Non Repetitive (t=100µs
–Repetitive(80%on –20%off; t on =10ms –DCOperation 32.52A A A V sens Sensing Voltage
–1to 2.3V P tot Total Power Dissipation (Tcase =75°C 25W T op Junction Operating Temperature –25to 130°C T stg , T j
Storage and Junction Temperature
–40to 150
°C
THERMAL DATA
Symbol Parameter
PowerSO20
Multiwatt15
Unit R th j-case Thermal Resistance Junction-case Max. –3°C/WR th j-amb
Thermal Resistance Junction-ambient
Max.
13(*
35
°C/W
(*Mounted on aluminum substrate
1
234567910118ENABLE B INPUT 3
LOGIC SUPPLY VOLTAGE V SS GND INPUT 2ENABLE A INPUT 1
SUPPLY VOLTAGE V S OUTPUT 2OUTPUT 1
CURRENT SENSING A
TAB CONNECTED TO PIN 813141512CURRENT SENSING B OUTPUT
4OUTPUT 3INPUT 4D95IN240A
Multiwatt15
PowerSO20
L298
2/13
PIN FUNCTIONS (referto the block diagram
MW.15PowerSO Name Function
1;152;19Sense A; Sense B Between this pin and ground is connected the sense resistor to control the current of the load.
2;34;5Out 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.