What is a multiphase buck power supply?
Big data, cloud computing, the rise of the concept of artificial intelligence, infrastructure facilities such as communication base stations, data centers, and terminal applications such as autonomous driving generated by the intelligentization of automobiles all require more power-hungry CPUs, GPUs, and ASICs to support more powerful computing power requirements. This poses serious challenges to supply voltage regulator modules (VRM/Vcore) and point-of-load power supplies (PoL), including: higher efficiency, higher power density, while meeting processor di/dt>1000A/us transient Respond to requests.
topology
The so-called multi-phase Buck power supply includes a controller and DrMOS. It is a multi-channel interleaved parallel synchronous Buck topology, which is recognized as the best solution for such application scenarios.
The half-bridge MOSFET corresponding to Buck of each phase can be replaced by DrMOS including drive and temperature/current detection, and a controller collects feedback signals such as voltage, current, temperature/error, and sends out PWM waves to realize closed-loop control of power. The controller can communicate with the system host computer or load processor through the communication interface of specific protocol (such as PMBus, AVSBus, SVID, SVI2/3, PWM-VID, etc.) and signal indication IO port.
The multi-phase controller connected to DrMOS can realize a high-current DC/DC system with a multi-phase topology structure, which can greatly increase the power supply, optimize energy consumption, improve overall performance, and simplify system power supply design. It is the core of high-power power supply chips and GPU the mainstream form of power supply.
Silicon Power uses industry-leading process technology to design innovative mixed-signal and analog chips. The products are widely used in automotive, industrial, consumer, cloud computing and communication equipment. They aim to improve efficiency and save or measure energy use. We are always committed to To provide customers with higher performance, higher reliability analog chip solutions.
**Silicon Multiphase Buck Power Supply SQ51201**
Silicon Lijie SQ51201 is a high-current multi-phase Buck controller, which can provide high-quality stable power output solutions for high-performance ASICs. The output voltage is interleaved and paralleled by up to 6 DrMOS. It realizes programmable switching frequency in the range of 300kHz~1MHz, which is fully compatible with Silicone DrMOS solution.
SQ51201 has a built-in PMBus interface, the output voltage is 0.25~2.5V in linear mode, and the step size is 1/512V; in VID mode, the step size is 5mV/10mV. Adaptive ripple-based on-time control provides fast transient response for high current applications.
The SQ51201 provides over-voltage, under-voltage, over-temperature and over-current protections, and simultaneously detects whether there is an open circuit or short circuit in the remote feedback, providing a complete set of advanced protection functions for point-of-load regulator applications.
Silicon Lijie 16V/70A integrated power stage DrMOS SQ29663
SQ29663 adopts industry-standard packaging, and integrates two high-performance MOS and drive and control units inside the chip. Through the optimized design of the internal structure and drive control, it can achieve high efficiency, high power density and good heat dissipation performance. Strict control and protection logic make it easily compatible with mainstream front-end controllers, suitable for CPU, GPU and POL power supply design.
SQ29663 supports the Vin voltage range of 5V~16V. The input signal is compatible with 3.3V/5V level and supports three-state signals to realize the control of different working modes. Dead time, propagation delay, and drive edge adjustments allow for efficient and safe operation.
SQ29663 integrates an 8mV/°C temperature sensor inside, and reports the temperature in real time through TMON. The typical output voltage is 800mV at 25°C. TMON can be pulled up or pulled down as a fault flag. SQ29663 can sample the current information of the internal MOSFET in real time and reconstruct it into a triangular wave proportional to the inductor current. The built-in temperature compensation enables it to output with an accuracy of 5mV/A ±5%. SQ29663 supports multiple protections including OCP, NOCP, OTP, pre-OVP, HSS, etc. to achieve safe and reliable operation.
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