L298N Dual Full-Bridge Driver
Dual full-bridge motor driver in Multiwatt-15 package, rated for up to 46V and 2A continuous per bridge (4A peak). No internal flyback diodes, add external diodes for inductive loads.
Aliase:L298, High Current Dual H-Bridge
Multiwatt-15 Pinout (Front View)
15 Pins
Pinout Table15
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | SENSE_A | Analog | Bridge A Current Sense — connect to GND via a shunt resistor (0.1–1Ω) to measure current; tie to GND if unused |
| 2 | OUT1 | Power | Bridge A Output 1 (connect to motor coil A terminal; state driven by IN1 when EN A is HIGH) |
| 3 | OUT2 | Power | Bridge A Output 2 (connect to motor coil B terminal; state driven by IN2 when EN A is HIGH) |
| 4 | VS | Power | Motor Supply Voltage (+5V to +46V; powers both output bridges; decouple with 100nF + 100µF to GND) |
| 5 | IN1 | Digital | Bridge A Logic Input 1 (controls OUT1; HIGH = OUT1 HIGH, LOW = OUT1 LOW, when EN A is HIGH) |
| 6 | EN_A | Digital | Bridge A Enable (Active High — HIGH enables OUT1/OUT2; LOW = both outputs high-Z; use PWM for speed control) |
| 7 | IN2 | Digital | Bridge A Logic Input 2 (controls OUT2; HIGH = OUT2 HIGH, LOW = OUT2 LOW, when EN A is HIGH) |
| 8 | GND | Ground | Common Ground (power and logic ground reference; connect to negative supply and logic ground) |
| 9 | VSS | Power | Logic Supply Voltage (+5V — powers internal logic and input buffers; separate from motor supply VS; add 100nF bypass cap to GND) |
| 10 | IN3 | Digital | Bridge B Logic Input 3 (controls OUT3; HIGH = OUT3 HIGH, LOW = OUT3 LOW, when EN B is HIGH) |
| 11 | EN_B | Digital | Bridge B Enable (Active High — HIGH enables OUT3/OUT4; LOW = both outputs high-Z; use PWM for speed control) |
| 12 | IN4 | Digital | Bridge B Logic Input 4 (controls OUT4; HIGH = OUT4 HIGH, LOW = OUT4 LOW, when EN B is HIGH) |
| 13 | OUT3 | Power | Bridge B Output 3 (connect to motor coil A terminal; state driven by IN3 when EN B is HIGH) |
| 14 | OUT4 | Power | Bridge B Output 4 (connect to motor coil B terminal; state driven by IN4 when EN B is HIGH) |
| 15 | SENSE_B | Analog | Bridge B Current Sense — connect to GND via a shunt resistor (0.1–1Ω) to measure current; tie to GND if unused |