Ellon Alloy Resistors: Injecting Accurate and Reliable Power into 140W High Power Charging and Discharging Solutions
On the compact PCB board of Yingjixin IP2366, two inconspicuous R005 shunt resistors are like sensors in precision instruments, silently carrying the responsibility of current monitoring. The recommended R005 shunt resistor can be either the Ellon brand or the Walter brand.
Yingjixin IP2366 PD3.1 140W multi string lithium battery charging and discharging solution, with its perfect balance of high power output and small size design, is rapidly occupying the outdoor power supply, portable equipment and other markets.
The scheme adopts a symmetrical and simple layout internally, with the core device IP2366 chip paired with a four switch synchronous boost and buck architecture, achieving bidirectional boost and buck from the battery to USB and from USB to the battery.
01 Scheme Analysis
The development of high-power charging and discharging solutions is closely related to the popularization of multi string lithium battery equipment. Currently, the increasing demand for power density and miniaturization of high energy consuming equipment such as outdoor power sources and electric tools has driven the development of charging and discharging technology towards higher efficiency and smaller size.
The IP2366 solution from Yingjixin is a product of this trend. This scheme adopts a slender rectangular aluminum shell design, with dimensions of only 83.2 × 35 × 26.01mm and a weight of approximately 79.9g, yet achieves a charging and discharging power of up to 140W.
The internal PCB layout is simple and efficient, with the core being the Yingjixin IP2366 main control chip. This chip integrates the PD3.1 protocol and synchronous voltage regulation function, supporting 26 strings of battery cells and multiple charging and discharging parameter configurations.
The scheme adopts a four switch synchronous buck boost architecture, consisting of four AON6144 power MOS transistors and EPC1265 buck boost main inductors, to achieve bidirectional voltage conversion between the battery and the USB port. The advantage of this architecture lies in its high efficiency and small size, making it very suitable for applications with limited space.
02 Key components
In the IP2366 scheme of Yingjixin, current sampling is a key link to achieve precise charge and discharge control. There is a shunt resistor labeled "R005" on both sides of the PCB board, specifically designed for real-time monitoring of charge and discharge currents.
These resistors are packaged in 2512, with a resistance of 0.005 Ω (5 milliohms), a power of 3W, and an accuracy of 1%. These parameters may seem simple, but they actually play an irreplaceable role in the scheme.
The ultra-low resistance of 0.005 Ω ensures minimal voltage drop during current sampling and reduces power loss; The rated power of 3W ensures that the resistor can operate stably in high current environments.
The 1% high precision provides reliable current data for the 14 bit ADC built into the IP2366 chip, enabling the system to accurately control the charging and discharging process, protect battery safety, and extend device life.
03 Resistance selection
In high-power charging and discharging schemes, the selection criteria for current sampling resistors are extremely strict. The accuracy of resistance directly affects the accuracy of charge and discharge control. The stability of resistance determines the reliability of long-term use, while the power bearing capacity is related to safety in high current environments.
The 2512 0.005R 3W 1% surface mount alloy resistor from the Ellon brand fully meets these stringent requirements. This resistor is made of advanced alloy materials and processes, with an extremely low temperature coefficient, and can maintain stable resistance over a wide temperature range of 55 ℃ to+155 ℃.
Compared with ordinary thick film resistors, alloy resistors have lower noise and better long-term stability. In high-power applications such as the IP2366 from Yingjixin, these characteristics are particularly important to ensure reliable operation of the equipment under various environmental conditions.
The Yineng resistor adopts a fully sealed structure, which is moisture-proof and corrosion-resistant, making it particularly suitable for applications such as outdoor power supplies that may face harsh environments.
04 billion energy advantage
Choosing Ellon brand alloy resistors essentially provides a long-term stable performance guarantee for high-power charging and discharging solutions. This brand has been deeply rooted in the field of alloy resistors for many years, forming a complete product line and technological accumulation.
The Yineng 2512 0.005R 3W 1% surface mount alloy resistor adopts a unique alloy formula and advanced thin film technology, achieving the best balance of resistance accuracy, temperature coefficient, and power density. The product undergoes rigorous aging and environmental testing to ensure stable performance even under harsh conditions such as high temperature and high humidity.
In practical applications, Yineng resistors perform excellently. Its extremely low inductance characteristics (less than 3nH) effectively reduce the impact of high-frequency switching noise on sampling accuracy; Excellent heat dissipation design ensures that the temperature rise of the resistor is controlled within a reasonable range during full load operation.
For design engineers, another advantage of Yineng resistors is their excellent supply stability and technical support. The brand provides detailed technical documentation and application guides to help engineers quickly complete design and debugging work.
05 Application Expansion
The application scope of the IP2366 solution from Yingjixin is constantly expanding. From the initial outdoor power supply, it has now extended to multiple fields such as electric tools, drones, portable medical devices, etc. These applications have raised higher requirements for the performance and reliability of charging and discharging schemes.
With the popularization of PD3.1 standard and the increase of 140W and above power devices, the demand for high-precision current sampling will become more urgent. With its excellent performance, the Yineng alloy resistor can fully meet the needs of these emerging applications.
In the future development, the charging and discharging scheme will evolve towards higher power density and more intelligent control. As a key sensor component, the accuracy and reliability of the current sampling resistor will directly affect the performance of the entire system.
Choosing a professional brand like Yineng not only meets current design needs, but also lays a solid foundation for future product upgrades and functional expansion.
The core of high-power charging and discharging solutions lies not only in the selection of the main control chip, but also in the precise matching of peripheral devices. When the engineer soldered the Yineng alloy resistor onto the PCB of the IP2366 scheme, this compact component began to continuously monitor the current flow of each ampere with a precision of 1%.
When the outdoor power source continuously supplies power to electronic devices and when the power tool completes high-intensity operations, the stable performance of the Yineng resistor ensures every link from battery management to power output. It is not only a component in the circuit, but also the guardian of the reliability of high-power electronic products.
