L9915

The L9915 is a high-voltage, dual-channel driver IC manufactured by STMicroelectronics, specifically designed for automotive and industrial applications requiring precise control of inductive loads such as solenoids, relays, and motors. It integrates two N-channel MOSFET drivers capable of handling peak currents up to 3 A per channel, with an operating supply voltage range from 4.5 V to 28 V, making it suitable for both low- and high-voltage systems. Each channel features built-in protection mechanisms including overcurrent detection, thermal shutdown, and undervoltage lockout (UVLO), ensuring robust operation under varying load and environmental conditions. The device also includes a dedicated bootstrap circuit for driving the high-side MOSFETs, enabling efficient switching at higher voltages without requiring an external high-voltage supply. This design reduces system complexity and component count while improving reliability. The L9915 supports both PWM and digital input modes for flexible control strategies, allowing users to implement precise current regulation or simple on/off switching based on application needs. Its logic inputs are compatible with standard CMOS and TTL levels, facilitating seamless integration with microcontrollers and other digital control units. Additionally, the chip provides diagnostic outputs such as fault indication and status signals, which enhance system monitoring and fault tolerance in safety-critical environments. Designed for harsh environments, the L9915 operates across a wide temperature range from -40°C to +150°C, meeting stringent automotive qualification standards like AEC-Q100. It is housed in a compact, thermally optimized 16-pin PowerSSO package that supports surface-mount assembly, reducing board space requirements and enhancing thermal dissipation. Common applications include electric power steering (EPS), brake booster control, fuel injection systems, HVAC actuators, and general-purpose industrial automation equipment where reliable, high-efficiency switching of inductive loads is essential. Its combination of integrated protection, high efficiency, and robust packaging makes the L9915 ideal for use in modern vehicle electrification and smart industrial systems demanding long-term stability and minimal maintenance.