L9982 - Automotive Quad Low-Side Driver | STMicroelectronics
料号： L9982 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 |
L9982 概述
A low-side driver is a power switch that connects the load to ground when activated, with the load connected between the positive supply and the driver output. In automotive systems, low-side drivers are commonly used to switch grounded loads such as lamps, relays, and solenoids, where the control signal from a microcontroller (MCU) activates the driver to sink current. The L9982 belongs to the power management IC family, specifically within the smart power switch category, which integrates logic, protection, and power stages in a single package.
Key features of the L9982 include four independent low-side outputs with a typical current capability of 1A per channel, an operating voltage range of 5.5V to 36V, and a low quiescent current for battery-powered applications. Each output includes overcurrent protection, thermal shutdown, and ESD protection, ensuring robust operation in harsh automotive environments. The device is available in a PowerSO-20 package, which provides excellent thermal performance for power dissipation.
The L9982 utilizes a vertical power MOSFET technology, enabling low on-resistance (typically 0.5 ohm) and efficient switching. The device is designed to operate over a wide temperature range of -40°C to +150°C, meeting AEC-Q100 automotive qualification standards. The integrated protection features reduce external component count and improve system reliability, making it an ideal choice for automotive body electronics.
Typical applications include automotive lighting control (headlamps, tail lamps, interior lights), relay and solenoid drivers for door locks, window lifts, and seat adjustments, and LED lighting modules. The device's ability to handle inductive loads with built-in freewheeling diodes simplifies design and reduces EMI.
When designing with the L9982, ensure proper PCB layout with adequate copper area for thermal dissipation, and place decoupling capacitors close to the supply pins. The device's protection features allow direct connection to MCU outputs, but external pull-up resistors may be needed for open-drain configurations.
直接替换替代料： L9982 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L9982 （相同外形与封装尺寸） ——差异在于 Output Current per Channel, Protection Features, Supply Voltage Range, Switching Frequency.
快速对比工具——选择替代料号进行并排对比：
L9982TR
✅ 直接替换📋 参考替代料（不在目录中）
L9980
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.1 / 个
查看数据手册 →MC33882
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BTS7008-2EPA
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L9982 最大额定值与电气特性
| 输出数量 | 4 |
| 输出类型 | Low-Side |
| Output Current per Channel | 1 A |
| Supply Voltage Range | 5.5 V to 36 V |
| On-Resistance (Typical) | 0.5 ohm |
| 静态电流 | 10 uA |
| 工作温度范围 | -40C to +150C |
| 封装 | PowerSO-20 |
| 安装类型 | 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 |
| 开关频率 | Up to 1 kHz |
L9982 引脚配置
| 引脚 1 | IN1 — Input control for output 1 |
| 引脚 2 | IN2 — Input control for output 2 |
| 引脚 3 | IN3 — Input control for output 3 |
| 引脚 4 | IN4 — Input control for output 4 |
| 引脚 5 | GND — Ground |
| 引脚 6 | OUT1 — Low-side output 1 |
| 引脚 7 | OUT2 — Low-side output 2 |
| 引脚 8 | OUT3 — Low-side output 3 |
| 引脚 9 | OUT4 — Low-side output 4 |
| 引脚 10 | VS — Supply voltage |
| 引脚 11 | VS — Supply voltage |
| 引脚 12 | GND — Ground |
| 引脚 13 | DIAG — Diagnostic output |
| 引脚 14 | NC — Not connected |
| 引脚 15 | NC — Not connected |
| 引脚 16 | NC — Not connected |
| 引脚 17 | NC — Not connected |
| 引脚 18 | NC — Not connected |
| 引脚 19 | NC — Not connected |
| 引脚 20 | NC — Not connected |
典型应用
L9982 适用于 6 应用s: 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.
推荐
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 (-40°C to +150°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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： L9982 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Higher output current per channel (1A) compared to L9980 （对比 L9980)
- Wide supply voltage range (5.5V to 36V) （对比 MC33882)
- Low quiescent current (10 uA) （对比 BTS7008-2EPA)
设计说明
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 40°C/W, so the junction temperature rise is 80°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.
合规信息
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not specified in the provided data.
