Adapting to State Grid standards, PSRAM has become an essential core component for HPLC chips.

(Industrial power grid & semiconductor technical style, unified industry terminology, State Grid standard expressions, suitable for official website, foreign trade brochures and technical white papers)

With the accelerated construction of the new power system, the digital and intelligent upgrading of smart grids has entered a critical stage. HPLC (High-Speed Power Line Communication) technology has become the core communication carrier for smart meters, concentrators and station area terminals, achieving full-scenario popularization across State Grid and China Southern Power Grid. From minute-level data collection to station area topology identification, from dual-mode concurrent operation of HPLC & HRF to in-depth application of edge computing, the latest State Grid specifications have raised higher requirements for HPLC chip performance. The memory bottleneck has become a key factor restricting chips from achieving optimal efficiency. Combining large capacity and high bandwidth, PSRAM (Pseudo-Static Random Access Memory) has evolved into a mandatory core component for HPLC power line communication chips, as well as an ideal solution for domestic substitution.

In power line communication scenarios, HPLC chips undertake multiple core tasks including data collection, signal processing, protocol transmission and security encryption. However, the built-in SRAM of conventional chips is merely 256KB–512KB, which is far insufficient for practical applications. The total data volume of single-frame power data, communication protocol stacks and topology tables exceeds 1MB. High-frequency collection, multi-node concurrency and dual-mode parallel operation impose stringent demands on memory capacity and read/write speed.

PSRAM fully demonstrates its unique advantages in such scenarios. It integrates the high capacity density of DRAM and the simple interface of SRAM, requiring no additional refresh controller with fewer pins and easy integration. It resolves the pain points of small capacity and high cost of traditional SRAM, while compensating for the complex circuits and high power consumption of conventional DRAM. Therefore, PSRAM serves as the optimal exclusive solution for memory expansion of HPLC chips.

Targeting State Grid HPLC chip applications, our company launches industrial-grade PSRAM products, mainly in 64Mbit (8MB) and 128Mbit (16MB) specifications. Fully compatible with mainstream HPLC chips including Hisilicon, Transoar, Neusoft, Dingsin, SmartChip and Leadmicro, our products perfectly comply with the latest mandatory State Grid standards such as Q/GDW 1374.2-2025 and Q/GDW 11612-2025, delivering four core supporting functions in practical applications.

Large-capacity cache supporting high-frequency collection and topology identification

HPLC chips require millisecond-level sampling, second-level data reporting and concurrent collection of hundreds of nodes. Our PSRAM easily caches hundreds of message frames and complete station area topology data, eliminating packet loss, retransmission and collection failure caused by insufficient memory. It guarantees 100% accuracy of station area data collection, providing reliable data support for power grid line loss management and fault prediction.

High bandwidth and low latency ensuring stable transmission in harsh environments

Power lines suffer from severe noise, sudden interference and signal attenuation. Adopting QSPI interface, our PSRAM supports bandwidth above 84MHz with read/write latency lower than 20ns, and enables linear burst access and cross-page reading. It buffers signal processing data in real time and realizes wait-free interaction with DSP and CPU, greatly reducing communication bit error rate and ensuring stable transmission of power line carrier signals under complex conditions.

Dual-mode architecture compatibility supporting advanced application implementation

The new-generation State Grid HPLC chips (Hisilicon Hi3931, Transoar TR3540, Neusoft ES3320, etc.) all adopt HPLC+HRF dual-mode design, running multiple tasks simultaneously including PLC baseband, radio frequency, protocol stacks and security encryption. Our PSRAM allocates independent cache regions for each task to realize smooth parallel dual-mode operation without resource preemption or lag. It fully supports advanced functions required by State Grid, such as power failure reporting, ID management, phase identification and online firmware upgrade.

Industrial-grade quality adapting to harsh power grid environments

As a core component of power equipment, our PSRAM is manufactured in strict accordance with industrial-grade standards, operating at -40℃ to +85℃, fully meeting outdoor and in-cabinet application requirements of power grids. With standby power consumption below 250μA, it adapts to low-power design of electricity meters and terminal devices. Having passed ESD protection and EMC tests, it features strong anti-interference capability. Mass verification on millions of modules proves its long-term stable operation.

At present, our PSRAM has been mass-applied in smart meters, concentrators, collectors and station area terminals. It is fully compatible with mainstream HPLC solutions from Hisilicon, Transoar and Neusoft, and has obtained State Grid interconnection and interoperability certification. Serving provincial power branches of State Grid and China Southern Power Grid as well as leading terminal manufacturers including Wasion, Linyang and XJ Electric, it has become the preferred memory solution for HPLC communication modules.

With HPLC technology evolving toward higher bandwidth, richer functions and superior reliability, PSRAM has transformed from an optional peripheral into an indispensable core component for HPLC chips. Adopting domestic industrial-grade PSRAM customized for power line communication scenarios can resolve memory bottlenecks, improve communication stability, help enterprises seize domestic substitution opportunities, reduce supply chain risks and control production costs. We will keep deepening in the power industry, optimize PSRAM performance, and provide memory solutions better tailored to State Grid demands. Together with industry partners, we will boost the high-quality development of smart grids.

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