BETAFull bridges2 Two motors or two windings
Dual full-bridge motor driver
L298 Specifications
Review L298 electrical specifications, operating conditions and package details.
Package view
Key specifications
Each enabled output pair can reverse a motor or command braking. VS provides motor energy; VSS supplies the control logic.
Motor-supply ceiling46 V operating
DC current per bridge2 A · thermal limits apply
Operating junction−25–130 °C · junction, not ambient
Package details
L298N · Multiwatt15 V
| Property | Details |
|---|---|
| Manufacturer | STMicroelectronics |
| Part number | L298N |
| Package | Multiwatt15 V |
| Connections | 15 pins |
| Mounting | Through-hole |
| Lead pitch | 1.27 mm · staggered rows |
| Package code | MW15V |
| Thermal reference | Grounded metal tab; heatsinking required according to dissipation |
Operating conditions
ST DS0218 · keep conditions attached
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Logic supply VSS | 4.5–7 V | 5 V nominal |
| Motor supply VS | VIH + 2.5 V to 46 V | Specified operative condition; example uses 12 V |
| Input / enable HIGH | 2.3 V to VSS | TTL-compatible thresholds |
| Input / enable LOW | −0.3 to 1.5 V | Normal LOW is 0 V |
| Operating junction | −25 to 130°C | Do not treat as an ambient specification |
| Local bypass capacitors | 100 nF on each supply | VS to GND and VSS to GND, near the IC |
No specifications match. Try a parameter name or a unit.
Keep enable inputs LOW before switching supplies on or off.
Bridge control
One motor between OUT1 and OUT2
Manufacturer specifications 5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| EN LOW; inputs any | Coast · Z / Z | No commanded drive; external diode paths still operate |
| EN HIGH; IN1 HIGH, IN2 LOW | Direction A | OUT1 HIGH, OUT2 LOW |
| EN HIGH; IN1 LOW, IN2 HIGH | Direction B | OUT1 LOW, OUT2 HIGH |
| EN HIGH; both inputs LOW | Brake to GND | Both outputs LOW |
| EN HIGH; both inputs HIGH | Brake to VS | Both outputs HIGH |
No specifications match. Try a parameter name or a unit.
Direction labels are commands. Mechanical direction depends on wiring; stop/reversal current must stay within limits.
Output drop and heating
VS = 42 V; VSS = 5 V; TJ = 25°C
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| High-side drop at 1 A | 1.35 V typical; 1.7 V maximum | Source transistor |
| Low-side drop at 1 A | 1.2 V typical; 1.6 V maximum | Sense return grounded |
| Total drop at 1 A | 3.2 V maximum | Combined bridge specification |
| High-side / low-side at 2 A | 2.0 V / 1.7 V typical | 2.7 V / 2.3 V maximum individually |
| Total drop at 2 A | 4.9 V maximum | Combined bridge specification |
| 12 V, 1 A example | 9.45 V across motor; 2.55 W bridge loss | Uses summed typical drops, excludes other losses |
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The example is an estimate, not a regulated motor voltage or a safe continuous thermal allowance.
Package connection map
Multiwatt15 → PowerSO-20
Manufacturer specifications 9 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| SENSE A / SENSE B | 1 / 15 → 2 / 19 | Separate bridge returns |
| OUT1 / OUT2 | 2 / 3 → 4 / 5 | Motor A |
| VS / VSS | 4 / 9 → 6 / 12 | Power stage / logic |
| IN1 / IN2 | 5 / 7 → 7 / 9 | Bridge A inputs |
| ENA / ENB | 6 / 11 → 8 / 14 | Bridge enables |
| IN3 / IN4 | 10 / 12 → 13 / 15 | Bridge B inputs |
| OUT3 / OUT4 | 13 / 14 → 16 / 17 | Motor B |
| Ground | 8 → 1, 10, 11, 20 | All ground contacts required |
| NC | None → 3, 18 | Leave open |
No specifications match. Try a parameter name or a unit.
The interactive pinout changes physical numbering with the selected package. Extra SMD grounds retain their ground function.
One-motor application
L298N front view · 5 V logic / 12 V motor
Manufacturer specifications 7 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Motor leads | OUT1 pin 2 and OUT2 pin 3 | Use a motor whose stall and braking currents suit the driver |
| Direction / enable | IN1 pin 5, IN2 pin 7, ENA pin 6 | Controller nets IN1, IN2, ENA; 10 kΩ enable pull-down |
| Power / logic | VS pin 4 = 12 V; VSS pin 9 = 5 V | 100 nF local bypass on both rails; bulk motor capacitance |
| Ground and returns | Pins 1, 8 and 15 to GND | Direct sense returns for this nonsensing example |
| Unused bridge B | 10, 11, 12 LOW; 13, 14 open | Keep outputs disabled |
| External diodes | Four fast diodes per active bridge | Output to VS and GND to output; low VF; trr ≤200 ns |
| Thermal design | Heatsink and short power paths | Check stall current, winding energy and supply absorption |
No specifications match. Try a parameter name or a unit.
Matched net labels are electrical connections. The illustration shows a bare IC; a breakout board may contain different supporting components.
Stress ratings and packages
Operating limits are not interchangeable with absolute maxima
Manufacturer specifications 8 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| VS / VSS absolute maximum | 50 V / 7 V | Do not design to the transient stress ceiling |
| DC output current | 2 A per channel | Absolute maximum; thermal and braking constraints apply |
| Peak current | 2.5 A repetitive; 3 A nonrepetitive | 80% ON, 10 ms ON / 100 ms single pulse respectively |
| Multiwatt RθJC / RθJA | 3°C/W / 35°C/W maximum | Manufacturer thermal conditions |
| PowerSO RθJA | 13°C/W maximum | Mounted on aluminum substrate; not ordinary FR4 |
| Multiwatt geometry | 20.2 mm body width; 1.27 mm lead pitch | 15 leads in staggered rows; vertical L298N |
| PowerSO geometry | 11.0 × 15.9 mm nominal body; 1.27 mm pitch | L298P, slug down; 20 numbered leads |
| Generic footprint downloads | TEP suggested land patterns | Check purchased outline, stencil, vias and assembly process |
No specifications match. Try a parameter name or a unit.
Thermal shutdown is included; automatic load-current regulation needs external circuitry.
Connections by function
Select a pin for its function, connection guidance and electrical notes.