STMicroelectronics

L9651

L9651 Description

The L9651 from STMicroelectronics is a high-performance 4-channel low-side power switch designed for general-purpose load driving applications. This surface-mount IC integrates N-channel MOSFETs with a 1:1 input-to-output ratio, enabling efficient switching of loads operating between 4.7V and 30V. With a maximum output current of 2A per channel and a typical Rds(on) of 500mΩ, the L9651 ensures minimal power dissipation and high efficiency. The device operates without an external supply voltage, simplifying system design. Packaged in a PWRSO20 tube, it is RoHS3 compliant and REACH unaffected, meeting stringent environmental standards.

L9651 Features

• Low-Side Configuration: Optimized for driving grounded loads with 4 independent channels.
• Robust Protection: Integrated open-load detection and over-temperature fault protection enhance system reliability.
• High Efficiency: Low 500mΩ Rds(on) reduces conduction losses, improving thermal performance.
• Wide Voltage Range: Supports 4.7V to 30V load voltage, suitable for automotive, industrial, and consumer applications.
• No External Supply Needed: Eliminates the need for a separate Vcc/Vdd, reducing BOM complexity.
• MSL 3 Rated: Withstands 168 hours of moisture exposure, ensuring durability in humid environments.

L9651 Applications

The L9651 excels in scenarios requiring multi-channel load switching with robust fault handling:

• Automotive Systems: Driving lamps, solenoids, or relays in body control modules.
• Industrial Automation: Controlling actuators, valves, or small motors in PLCs.
• Consumer Electronics: Power management in appliances or LED lighting systems.
• Diagnostic Equipment: Enabling safe load switching in test and measurement devices.

Conclusion of L9651

The L9651 stands out as a versatile, high-efficiency power switch for low-side applications, combining low Rds(on), integrated protection, and a wide operating range. Its 4-channel design and simplified supply requirements make it ideal for space-constrained or cost-sensitive designs. With STMicroelectronics' proven quality and compliance with ROHS3/REACH, the L9651 is a reliable choice for demanding environments in automotive, industrial, and consumer markets.