ST Gate Drivers Ensure High Energy Efficiency in Battery-Operated Equipment

Why It Matters

The new drivers deliver higher efficiency and lower bill‑of‑materials for battery‑operated equipment, enabling longer runtimes and faster time‑to‑market for OEMs in the growing cordless‑tool segment.

Key Takeaways

• STDRIVE102 series supports 6‑V to 50‑V supplies for brushless motors
• Ultra‑low 50 nA standby current extends battery life in portable tools
• Integrated charge pump enables 100 % PWM duty cycle without external components
• SPI‑enabled STDRIVE102P/B provide programmable gate current and on‑chip AFE

Pulse Analysis

Battery‑powered tools and appliances are under pressure to deliver longer runtimes while keeping costs low. Traditional gate‑driver solutions often require multiple external components—resistors, regulators, and charge‑pump circuits—that add to the bill‑of‑materials and consume precious board space. STMicroelectronics’ STDRIVE102 family addresses these challenges by integrating a charge pump, dual LDOs, and a programmable analog front‑end into a single 5 mm×5 mm or 6 mm×6 mm package. The ultra‑low 50 nA standby current and the ability to drive six N‑channel MOSFETs from 6 V to 50 V make the series especially suited for cordless power tools, robotic vacuums, and other portable devices where every milliwatt counts.

Beyond energy efficiency, the STDRIVE102P and STDRIVE102BP add design flexibility through an SPI interface that lets engineers fine‑tune gate‑current limits, slew rates, and AFE settings without redesigning hardware. The BP variant’s three programmable‑gain amplifiers and comparators enable precise shunt‑current monitoring, facilitating advanced motor‑control algorithms such as field‑oriented control. By eliminating the need for external resistors and separate voltage regulators, manufacturers can reduce PCB complexity, improve reliability, and accelerate certification cycles. The integrated protection features—including dual‑redundant over‑current monitoring and thermal shutdown—further enhance safety in high‑stress applications.

STMicroelectronics supports rapid prototyping with the EVLDRIVE102P and EVLDRIVE102BP evaluation boards, which pair seamlessly with Nucleo development kits and the STM32 X‑CUBE‑MCSDK motor‑control software. This ecosystem lowers the barrier for OEMs and design houses to adopt the new drivers, fostering quicker iteration and faster time‑to‑market. As the cordless‑tool market is projected to exceed $30 billion globally by 2028, the STDRIVE102 series positions ST as a key enabler of the next generation of high‑efficiency, low‑cost battery‑operated equipment.