AP MEMORY APS6404L-SQRH-SN Optimizes Charging Module Performance

In modern charging module design, as fast-charging protocols become more complex and the need for dynamic power allocation grows, efficient data buffering has become key to ensuring charging efficiency and stability. Mainstream smart charging modules adopt a "Host MCU + Power Stage + Communication Interface" architecture, requiring real-time processing of voltage/current sampling, protocol handshaking, and fault log data. Pseudo SRAM (PSRAM) demonstrates significant advantages in such scenarios due to its high bandwidth, low pin count, and lack of need for external refresh circuitry. Compared to traditional DRAM, PSRAM's interface timing is closer to SRAM, eliminating complex refresh control logic and greatly simplifying PCB design and driver development. Compared to conventional SRAM, it offers a smaller package size and lower cost for the same capacity, perfectly aligning with the dual constraints of space and cost in charging modules. Its low power consumption is especially suitable for battery-powered or energy-sensitive applications.

For smart charging modules, the core function of a 64Mb PSRAM is to serve as a high-efficiency data buffer, temporarily storing rapidly changing charging status information, protocol stack data, and temporary logs. Its advantages are threefold: First, it provides ample capacity (8MB), allowing simultaneous buffering of multiple frames of sampled data and interactive messages for complex protocols (like PD3.0/QC4.0), preventing data loss due to insufficient buffer space. Second, nanosecond-level access latency ensures the MCU can quickly respond to sudden voltage/current changes, improving closed-loop control precision. Third, its self-refresh mechanism frees the MCU from managing data retention, allowing it to focus on charging algorithm scheduling. For example, when implementing multi-port intelligent power distribution, the 64Mb PSRAM can temporarily store real-time power requests and allocation strategies for each port, supporting the module in completing dynamic adjustments within 200ms, ensuring stability during simultaneous fast charging of multiple devices.

AP MEMORY's APS6404L-SQRH-SN is a high-performance 64Mb PSRAM, operating at 1.8V and housed in a standard SOP-8 package, supporting an x4 data bus and a maximum clock frequency of 200MHz. Its key parameters deliver significant value for charging modules: Firstly, its operating voltage of 1.8V±0.1V directly matches the I/O voltage of mainstream low-power MCUs, eliminating the need for level-shifting circuits and simplifying power supply design. Secondly, the 200MHz frequency provides 400Mbps bandwidth, sufficient to handle real-time sampling data streams at switching frequencies around 100kHz. Thirdly, its industrial-grade temperature range (-40°C to 85°C) ensures long-term stable operation of the module within high-temperature enclosures. Fourthly, a standby current of <50µA, which can drop further to the microamp level in deep power-down mode, significantly optimizes the module's standby power consumption. Compared to generic PSRAM, this chip features a built-in self-refresh circuit and temperature compensation mechanism, maintaining data integrity without external controller intervention. In smart charging modules, the APS6404L-SQRH-SN can directly connect to the MCU's memory interface, serving as a protocol stack cache and waveform data buffer. Its high-speed read/write characteristics ensure delay-free execution of multi-port power allocation algorithms. As the official authorized distributor for AP MEMORY, MANDU provides comprehensive technical support for charging module developers, including chip selection guidance, signal integrity simulation, PCB layout optimization, and free sample applications, helping customers shorten development cycles and quickly pass relevant certifications.

For smart charging module R&D engineers, the AP MEMORY APS6404L-SQRH-SN PSRAM, with its high bandwidth, low power consumption, and industrial-grade reliability, is the ideal choice for optimizing system performance and energy efficiency. Its compact package and low pin-count design significantly save PCB space, while MANDU's localized technical services ensure efficient project advancement. Choosing this device means injecting an efficient and reliable data caching core into your charging module.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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