L9982 - Automotive Quad Low-Side Driver | STMicroelectronics
MPN: L9982 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.1 | $21.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.6 | $800.00 |
| 1,000 | $1.45 | $1,450.00 |
Drop-in alternatives for L9982 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
L9982TR
β Drop-Inπ Reference alternative (not in catalog)
L9980
β Drop-Inβ 99,999 In Stock
$2.1 / Unit
View Datasheet βMC33882
β Drop-Inπ Reference alternative (not in catalog)
BTS7008-2EPA
β‘ Same Packageπ Reference alternative (not in catalog)
L9982 Maximum Ratings & Electrical Characteristics
| Number of Outputs | 4 |
| Output Type | Low-Side |
| Output Current per Channel | 1 A |
| Supply Voltage Range | 5.5 V to 36 V |
| On-Resistance (Typical) | 0.5 ohm |
| Quiescent Current | 10 uA |
| Operating Temperature Range | -40C to +150C |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| Protection Features | Overcurrent, Thermal Shutdown, ESD |
| ESD Rating | 2 kV HBM |
| AEC-Q100 Qualified | Yes |
| RoHS Compliant | Yes |
| Input Logic Level | 3.3V / 5V compatible |
| Switching Frequency | Up to 1 kHz |
L9982 Pin Configuration
| Pin 1 | IN1 β Input control for output 1 |
| Pin 2 | IN2 β Input control for output 2 |
| Pin 3 | IN3 β Input control for output 3 |
| Pin 4 | IN4 β Input control for output 4 |
| Pin 5 | GND β Ground |
| Pin 6 | OUT1 β Low-side output 1 |
| Pin 7 | OUT2 β Low-side output 2 |
| Pin 8 | OUT3 β Low-side output 3 |
| Pin 9 | OUT4 β Low-side output 4 |
| Pin 10 | VS β Supply voltage |
| Pin 11 | VS β Supply voltage |
| Pin 12 | GND β Ground |
| Pin 13 | DIAG β Diagnostic output |
| Pin 14 | NC β Not connected |
| Pin 15 | NC β Not connected |
| Pin 16 | NC β Not connected |
| Pin 17 | NC β Not connected |
| Pin 18 | NC β Not connected |
| Pin 19 | NC β Not connected |
| Pin 20 | NC β Not connected |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
L9982 is suitable for 6 applications: Automotive Lighting Control, Relay and Solenoid Drivers, LED Lighting Modules, Body Control Module (BCM), Industrial Automation, Power Distribution.
Automotive Lighting Control
The L9982 is ideal for controlling exterior and interior lighting in vehicles, including headlamps, tail lamps, and interior lights. Its four low-side outputs can drive multiple LED or incandescent lamps, with built-in protection against overcurrent and thermal overload. The wide operating voltage range (5.5V to 36V) accommodates both 12V and 24V systems, and the low quiescent current minimizes battery drain when the lights are off. In a typical headlamp application, the L9982 switches the low-beam and high-beam lamps, with each channel handling up to 1A. The device's freewheeling diodes protect against inductive spikes from relay coils, and the AEC-Q100 qualification ensures reliability in harsh automotive environments. Designers can use the L9982 to replace discrete MOSFETs and protection circuits, reducing board space and component count.
Recommended
Relay and Solenoid Drivers
The L9982 is well-suited for driving relays and solenoids in automotive body control modules, such as door locks, window lifts, and seat adjustments. Each output can sink up to 1A, sufficient for most automotive relays and small solenoids. The built-in freewheeling diodes clamp the inductive kickback voltage, eliminating the need for external diodes and reducing EMI. The device's overcurrent and thermal protection prevent damage from stalled motors or shorted loads. In a door lock application, the L9982 drives the lock/unlock solenoids, with the MCU providing control signals. The low on-resistance (0.5 ohm) minimizes power dissipation, and the wide temperature range (-40Β°C to +150Β°C) ensures operation in extreme conditions. The L9982 simplifies the design by integrating protection and diagnostic features, reducing external component count and improving system reliability.
Recommended
LED Lighting Modules
The L9982 can drive LED lighting modules in automotive applications, such as daytime running lights, turn signals, and interior ambient lighting. Each channel can handle up to 1A, which is sufficient for driving multiple LEDs in series or parallel configurations. The device's constant current capability is not built-in, so external resistors or LED drivers are needed for precise current control. However, the L9982 provides robust switching with protection against overcurrent and thermal overload, ensuring long LED life. In a typical LED module, the L9982 switches the ground side of the LED string, with a resistor limiting the current. The wide input voltage range accommodates load dump transients, and the low quiescent current helps meet standby power requirements. The AEC-Q100 qualification makes it suitable for automotive LED lighting systems.
Recommended
Body Control Module (BCM)
The L9982 is a key component in automotive body control modules, which manage various electrical loads such as lighting, locks, windows, and wipers. Its four low-side outputs can drive multiple loads, and the integrated protection features reduce the need for external components. The device's SPI interface (if available) allows for diagnostic feedback, enabling the BCM to monitor load status and detect faults. In a BCM, the L9982 is controlled by a microcontroller, which sends commands to switch loads on and off. The wide operating voltage range and low quiescent current are essential for battery-powered systems. The L9982's thermal shutdown prevents damage from overloads, and its ESD protection ensures robustness in the automotive environment. By using the L9982, designers can reduce PCB area and improve system reliability.
Recommended
Industrial Automation
Although designed for automotive, the L9982 can be used in industrial automation for switching solenoids, relays, and small motors in control systems. Its wide supply voltage range (5.5V to 36V) makes it compatible with 24V industrial systems, and the protection features ensure reliable operation in harsh environments. The device's low on-resistance and high current capability (1A per channel) are suitable for driving small actuators and valves. In an industrial PLC, the L9982 can be used to drive output modules, with the MCU providing control signals. The device's thermal shutdown and overcurrent protection prevent damage from faults, and its ESD rating ensures robustness. The PowerSO-20 package is suitable for industrial PCBs, and the AEC-Q100 qualification, while not required, indicates high reliability.
Recommended
Power Distribution
The L9982 can be used in power distribution systems to switch loads in a controlled manner, such as in smart junction boxes or power management units. Its four low-side outputs allow for multiple load switching, and the protection features ensure safe operation. The device's low quiescent current is beneficial for always-on systems, and the wide voltage range accommodates various supply rails. In a smart junction box, the L9982 is used to distribute power to different loads, with the MCU controlling each channel. The device's diagnostic capabilities (if available) allow for load monitoring and fault detection. The L9982's thermal shutdown prevents overheating, and its ESD protection ensures reliability. This application benefits from the device's compact package and integrated protection, reducing design complexity.
Recommended
Recommended Products Summary
Engineering reference data for L9982 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9982TR | L9980 | MC33882 | BTS7008-2EPA |
|---|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Infineon |
| Output Type | Low-Side | Low-Side | Low-Side | Low-Side | High-Side |
| Number of Outputs | 4 | 4 | 4 | 4 | 2 |
| Output Current per Channel | 1 A | 1 A | 0.5 A | 1 A | 8 A |
| Supply Voltage Range | 5.5V to 36V | 5.5V to 36V | 5.5V to 36V | 5.5V to 36V | 5.5V to 36V |
| On-Resistance | 0.5 ohm | 0.5 ohm | 1 ohm | 0.5 ohm | 0.1 ohm |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher output current per channel (1A) compared to L9980 (vs L9980)
- Wide supply voltage range (5.5V to 36V) (vs MC33882)
- Low quiescent current (10 uA) (vs BTS7008-2EPA)
Design Notes
The L9982 can dissipate significant power when driving loads at high current. For example, at 1A per channel with a 0.5 ohm on-resistance, each channel dissipates 0.5W, totaling 2W for all four channels. The PowerSO-20 package has a thermal resistance of approximately 40Β°C/W, so the junction temperature rise is 80Β°C above ambient. Ensure adequate copper area on the PCB and consider a thermal pad connection to the exposed pad for heat sinking.
Place decoupling capacitors (100nF and 10uF) close to the VS and GND pins to suppress voltage transients. For inductive loads, ensure the freewheeling diodes are properly connected to clamp kickback voltage. Keep the input control lines short and away from high-current output traces to avoid noise coupling.
Do not exceed the absolute maximum supply voltage of 40V. Ensure the input control signals are within the specified logic levels (3.3V or 5V). When driving inductive loads, verify that the freewheeling diodes are rated for the load current and voltage. Also, avoid parallel connection of outputs to increase current capability, as this may cause uneven current sharing.
Compliance Information
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not specified in the provided data.
