L9986 - Automotive Quad Low-Side Driver | STMicroelectronics
Teilenummer: L9986 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.56 | $25,60 |
| 100 | $2.28 | $228,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.85 | $1.850,00 |
L9986 Übersicht
A low-side driver is a type of power switch that connects the load to ground when activated, allowing the load to be powered from a positive supply rail. In automotive systems, low-side drivers are commonly used to control actuators, lights, and motors, where the load is connected between the battery positive terminal and the driver output. The L9986 belongs to the family of smart power switches, which integrate protection and diagnostic functions to simplify system design and improve safety.
Key features of the L9986 include four independent output channels, each capable of delivering up to 1.5 A continuous current, with a maximum supply voltage of 40 V. The device features overcurrent, overtemperature, and short-circuit protection, as well as an open-load detection function for diagnostic purposes. The outputs are protected against inductive load demagnetization, and the device is AEC-Q100 qualified for automotive applications.
The L9986 is built using STMicroelectronics' VIPower M0-5 technology, which combines vertical P-channel power MOSFETs with CMOS control logic on a single chip. This integration allows for low quiescent current consumption and fast switching performance, while maintaining high thermal efficiency. The device is available in a PowerSO-16 package, which provides excellent thermal dissipation for high-current operation.
Typical applications include automotive body control modules, relay drivers, solenoid drivers, and LED lighting control. The L9986 is also suitable for industrial automation and general-purpose switching applications where multiple low-side loads need to be controlled with minimal external components.
When designing with the L9986, it is important to consider the thermal dissipation at high output currents and to provide adequate PCB copper area for heat sinking. Additionally, proper decoupling of the supply voltage and careful layout of the output traces are essential to minimize EMI and ensure reliable operation.
Drop-in-Alternativen für L9986 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit L9986 (gleiche Bauform und Footprint) – abweichend in On-Resistance (per channel), Package, Protection Features.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
L9985
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$2.1 / Stück
Datenblatt ansehen →BTS724G
⚡ Gleiches Gehäuse ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
L9986 Grenzwerte & elektrische Eigenschaften
| Number of Channels | 4 |
| Output Current per Channel | 1.5 A |
| Supply Voltage Range | 5.5 V to 40 V |
| Ausgangstyp | Low-Side |
| On-Resistance (per channel) | 0.35 ohm |
| Ruhestrom | 5 mA |
| Betriebstemperaturbereich | -40C to +150C |
| Gehäuse | PowerSO-16 |
| Montageart | Surface Mount |
| Protection Features | Overcurrent, Overtemperature, Short-Circuit, Open-Load Detection |
| AEC-Q100 Qualified | Yes |
| RoHS Compliant | Yes |
| Input Logic Level | 3.3V/5V compatible |
| Schaltfrequenz | Up to 1 kHz |
| Output Clamp Voltage | 45 V |
L9986 Pin-Konfiguration
| Pin 1 | IN1 — Input control for channel 1 |
| Pin 2 | OUT1 — Output for channel 1 |
| Pin 3 | IN2 — Input control for channel 2 |
| Pin 4 | OUT2 — Output for channel 2 |
| Pin 5 | IN3 — Input control for channel 3 |
| Pin 6 | OUT3 — Output for channel 3 |
| Pin 7 | IN4 — Input control for channel 4 |
| Pin 8 | OUT4 — Output for channel 4 |
| Pin 9 | GND — Ground |
| Pin 10 | GND — Ground |
| Pin 11 | VCC — Supply voltage |
| Pin 12 | VCC — Supply voltage |
| Pin 13 | DIAG — Diagnostic output |
| Pin 14 | NC — Not connected |
| Pin 15 | NC — Not connected |
| Pin 16 | NC — Not connected |
Typische Anwendungen
L9986 ist geeignet für 6 Anwendungs: Automotive Body Control Module, Industrial Relay Driver, LED Lighting Control, Solenoid Driver, Motor Control, General Purpose Switching.
Automotive Body Control Module
The L9986 is used in automotive body control modules to drive relays, solenoids, and lamps. Its four independent channels allow control of multiple loads, while the built-in protection and diagnostic features ensure reliable operation in harsh automotive environments. The device's AEC-Q100 qualification and wide supply voltage range (5.5V to 40V) make it suitable for 12V and 24V vehicle systems. In a typical body control module, the L9986 is placed between the microcontroller and the load, with each channel driving a relay or lamp. The open-load detection feature enables fault detection, such as a burnt-out bulb, which is critical for safety and maintenance. The low on-resistance (0.35 ohm) minimizes power dissipation, reducing heat generation in the module. Additionally, the device's thermal shutdown protection prevents damage in case of overload, ensuring long-term reliability.
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Industrial Relay Driver
In industrial automation, the L9986 is used to drive relays and solenoids in control panels and machinery. Its high output current (1.5A per channel) and robust protection features make it ideal for switching inductive loads. The device's wide supply voltage range allows operation from 24V industrial supplies, and its low quiescent current (5mA) is beneficial for energy-efficient systems. The L9986's open-load detection can be used to monitor relay coil integrity, preventing failures in critical processes. The PowerSO-16 package provides good thermal performance, allowing continuous operation at moderate currents. In a typical industrial relay driver circuit, the L9986 is controlled by a PLC or microcontroller, with each channel driving a relay coil. The built-in overcurrent and overtemperature protection ensure safe operation even in fault conditions, reducing downtime and maintenance costs.
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LED Lighting Control
The L9986 can be used to control LED lighting in automotive and industrial applications. Each channel can drive a string of LEDs or an LED module, with the low-side switch providing a ground path. The device's current capability (1.5A) is sufficient for many LED lighting applications, and its protection features prevent damage from overcurrent or short circuits. The open-load detection can be used to detect failed LED strings, enabling fault reporting. In automotive lighting, the L9986 is used for daytime running lights, tail lights, and interior lighting. The wide supply voltage range (5.5V to 40V) accommodates various LED configurations, and the low on-resistance minimizes voltage drop, ensuring consistent brightness. The device's AEC-Q100 qualification ensures reliability in automotive environments.
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Solenoid Driver
The L9986 is well-suited for driving solenoids in automotive and industrial systems, such as fuel injectors, valves, and locking mechanisms. Its high output current and inductive load handling capability make it ideal for these applications. The device's output clamp voltage (45V) safely handles the back-EMF generated when the solenoid is de-energized, preventing damage to the switch. The built-in overcurrent and overtemperature protection ensure reliable operation even in harsh conditions. In a typical solenoid driver circuit, the L9986 is controlled by a microcontroller, with each channel driving a solenoid. The open-load detection can be used to detect a disconnected solenoid, enabling fault diagnostics. The device's wide supply voltage range and AEC-Q100 qualification make it suitable for automotive solenoid applications.
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Motor Control
The L9986 can be used in low-power motor control applications, such as driving small DC motors or stepper motors. Each channel can be used to control a motor winding or a motor direction switch. The device's current capability (1.5A) is suitable for small motors, and its protection features prevent damage from overcurrent or short circuits. In a typical motor control circuit, the L9986 is used as a low-side switch in an H-bridge configuration, with external high-side switches. The device's fast switching capability (up to 1kHz) is sufficient for many motor control applications. The open-load detection can be used to detect a disconnected motor, enabling fault diagnostics. The device's wide supply voltage range and thermal protection make it suitable for industrial and automotive motor control.
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General Purpose Switching
The L9986 is a versatile quad low-side driver that can be used for general-purpose switching in various applications, including test equipment, consumer electronics, and industrial controls. Its four independent channels allow multiple loads to be switched with a single IC, reducing component count and board space. The device's wide supply voltage range (5.5V to 40V) and logic-level inputs (3.3V/5V compatible) make it easy to interface with microcontrollers and other digital logic. The built-in protection features ensure safe operation in fault conditions, and the open-load detection provides diagnostic capability. In a typical general-purpose switching application, the L9986 is used to control lamps, relays, or small motors, with each channel driven by a GPIO pin. The device's low quiescent current and thermal performance make it suitable for battery-powered and high-temperature environments.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für L9986 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | L9985 | BTS724G |
|---|---|---|---|
| Package | PowerSO-16 | PowerSO-16 | PowerSO-16 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon |
| Number of Channels | 4 | 4 | 4 |
| Output Current per Channel | 1.5 A | 1 A | 1.5 A |
| Supply Voltage Range | 5.5V to 40V | 5.5V to 40V | 5.5V to 40V |
| On-Resistance | 0.35 ohm | 0.5 ohm | 0.3 ohm |
| Protection Features | Overcurrent, Overtemperature, Short-Circuit, Open-Load Detection | Overcurrent, Overtemperature, Short-Circuit | Overcurrent, Overtemperature, Short-Circuit |
| AEC-Q100 Qualified | Yes | Yes | Yes |
Wichtigste Unterscheidungsmerkmale
- Higher output current per channel (1.5A) compared to L9985 (1A) (vs. L9985)
- Includes open-load detection feature (vs. L9985)
- Lower on-resistance (0.35 ohm) compared to L9985 (0.5 ohm) (vs. L9985)
Designhinweise
The L9986 can dissipate significant power when driving high currents. For example, at 1.5A per channel with a 0.35 ohm on-resistance, each channel dissipates approximately 0.79W. With all four channels active, total dissipation is about 3.15W. The PowerSO-16 package has a thermal resistance of approximately 40C/W (theta_JA), so the junction temperature rise would be 126C above ambient. Ensure adequate PCB copper area and airflow to keep the junction temperature within the rated range.
Place decoupling capacitors (100nF and 10uF) close to the VCC pins to filter supply noise. For each output, add a flyback diode (e.g., 1N4007) across inductive loads to protect the switch from back-EMF. Keep output traces short and wide to minimize inductance and resistance.
Do not exceed the maximum supply voltage of 40V. Ensure the input logic levels are compatible with the microcontroller (3.3V/5V). When driving inductive loads, always use a flyback diode to prevent voltage spikes that could damage the device. Also, monitor the DIAG pin for fault conditions and implement appropriate software handling.
Compliance-Informationen
AEC-Q100 qualified per STMicroelectronics product page. RoHS compliant. REACH compliance assumed based on STMicroelectronics policy.
