Powering the Brains of Autonomous Driving with Bourns SPB inductors

In advanced driver-assistance systems (ADAS), the GPUs driving artificial intelligence demand highly efficient and reliable power delivery. Multiphase buck controllers are widely adopted to meet these requirements, offering superior current handling, thermal balance, and reduced ripple.

Bourns® SPB Power Bead Inductors—such as the SPB0705, SPB1005, SPB1007, and SPB1012—are specifically engineered for high-current, multiphase applications. Featuring ferrite shielding and ultra-low DC resistance (as low as 0.12 Ω), these inductors minimize power losses (I²R) and improve overall conversion efficiency. Their shielded structure also helps reduce EMI, protecting sensitive automotive sensors and circuits.

Integrating SPB inductors into automotive GPU power supplies enables high efficiency and compact design, effectively managing heat in space-constrained environments. Multiple SMD sizes allow flexible layout optimization, supporting higher power density and performance reliability.

With their combination of low loss, low noise, and compact form, the SPB Power Bead Inductor series provides a robust solution to meet the demanding standards of AI-driven automotive systems.

The SPB series delivers critical performance characteristics that align perfectly with the demands of modern multiphase buck controllers.The high rated current, low DC resistance and multiple footprint features of these inductors make them well suited for applications in multi-phase regulators, power processors, memory modules, servers, storage, data centers, networking systems, and graphic cards.

Features 

• Fit for Automotive multiphase power structure
• Shielded construction
• High rated current
• Low DCR
• RoHS compliant and halogen free
• AECQ Compliant

Application 

• Voltage Regulator Modules (VRMs)
• CPU/GPU/FPGA power
• High current ASICs
• High current multi-phase regulators
• Power processors and memory modules
• Servers, storage and data centers
• Networking systems and graphic cards

Key Components 

• SPB0705, 6.7 x 6.5 x 4.7 mm, 72 – 150 nH 
• SPB1005, 10.2 x 7 x 5 mm, 100 – 220 nH 
• SPB1007, 10.5 x 8 x 7.5 mm, 115 – 300 nH 
• SPB1012, 10 x 6.2 x 12 mm .100 – 330 nH 
• SPB1308, 13.5 x 13 x 8 mm, 210 – 440 nH

Benefits

• Enhanced Efficiency & Reduced Losses: Engineered with an extremely low DC resistance (ranging from 72 to 440 nH), these inductors minimize I²R power losses, directly contributing to higher system efficiency and thermal performance.
• High Current Handling: Designed for high rated current (up to 61 A depending on the model), they provide robust performance in high-power applications.
• Minimized Interference: The ferrite-based shielded construction ensures low magnetic field radiation, preventing noise and interference between tightly packed power stages and with other sensitive circuits.

Video

https://www.bourns.com/resources/training/magnetics

Block Diagram