Integrated multiphase controller for automotive AI

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By Nick Flaherty

Dialog Semiconductor has launched a family of high current automotive grade step down DC-DC Buck converters with integrated FETs for AI applications in automotive designs.

The DA914X-A DC-DC converter supports currents up to 40A to drive AI processors, replacing discrete FETs and power controller. This reduces the external components, cutting the bill of material (BoM) and the footprint to 170 mm2 while increasing the reliability.

The integration also increases the conversion efficiency, helping to reduce power loses and address the thermal design challenges of powering complex automotive SoCs with very high current requirements in applications such as machine learning and vision applications for next generation autonomous vehicles.

The four phase operation of the DC-Dc controllers provides improved transient performance, lower losses, better efficiency, optimized thermal dissipation, and minimized ripple current and voltages when compared to a single-phase architecture. This follows on from the single phase DA913X-A family launched last year with integrated FETs for ADAS safety and communications systems.

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Dialog is soon to become part of Renesas Electronics, which has a strong automotive product line and multiphase controllers from its acquisition of Intersil.

The Dialog DA914X-A family currently includes two devices. The DA9141-A operates as a single-channel, quad-phase buck converter, delivering up to, 40A output current.  The DA9142-A operates as a single-channel, dual-phase buck converter, delivering up to, 20 A output current. All devices have an input voltage range of 2.8 V to 5.5 V and an output voltage range of 0.3 V to 1.3 V, making them suitable for a wide variety of low power systems.

“As electronics in automobiles continue to demand higher performance heterogeneous processing capability, the requirement for cost effective, space saving power solutions becomes more and more critical,” said Tom Sandoval, Senior Vice President, GM Automotive Business Segment, Dialog Semiconductor. “The DA914X PMIC family of products offers automotive customers market leading high current power delivery solutions for multi-core automotive SoCs with embedded high-performance graphics or AI processor cores.”

Remote sensing guarantees the highest accuracy and supports multiple PCB routing scenarios without loss of performance while a fully programmable soft start limits the inrush current from the input to give a slope-controlled output voltage

Dynamic Voltage Control (DVC) enables adaptive adjustment of the supply voltage dependent on the load. This increases efficiency when the downstream circuitry enters low power or idle mode, resulting in power savings.

The devices have configurable GPIOs that support a range of features including I2C, DVC and Power Good indicator

The DA914X-A devices are AEC-Q100 Grade 1 qualified and are available in a
4.5mm x 7.0mm, 0.6mm pitch 60-pin FC-BGA package. Industrial/Commercial grade versions are also available.;

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