Disassembling YMIN’s Low ESR Solid Capacitors: From Parameter Advantages to Real-World Performance, How to “Cool Down and Improve Efficiency” in Power Supply Design?

Introduction

Dear power supply engineers, have you ever been troubled by persistently high ripple and overheating capacitors when debugging prototypes? Especially in today’s pursuit of high power density, the ESR and ripple current capabilities of capacitors have become invisible barriers determining the success or failure of a design. This article will take YMIN’s VPX/VPT series as an example for an in-depth technical analysis, showing how it solves these pain points with concrete data.

YMIN’s Solution and Advantages

Taking a typical 65W 2C2A GaN fast charger as an example, it needs to handle switching frequencies of up to several hundred kHz in a confined space. If ordinary solid capacitors (ESR approximately 40mΩ) are used, their losses at high frequencies are not to be underestimated. We have observed that under full load output, the core temperature of such capacitors can exceed 85℃, which not only poses thermal safety risks but also causes capacitance decay and ESR increases due to high temperatures, raising questions about long-term reliability.

The core issue lies in ESR. Power loss P_loss = I_rms² × ESR. When the switching frequency rises to 100kHz, the capacitive reactance (Xc) decreases sharply, and ESR becomes the main component of the impedance. Taking a capacitor with an ESR of 40mΩ carrying a 2A ripple current as an example, its single-cell loss is as high as 0.16W. In a compact space, this heat is extremely difficult to dissipate. YMIN’s solution reduces the ESR to 20mΩ, lowering the loss to 0.08W under the same conditions, directly halving the heat generation and fundamentally solving the temperature rise problem.

- YMIN’s Solution and Process Advantages: Dual Innovation in Materials and Structure -

YMIN’s low ESR is not accidental, but the result of systematic engineering:

Electrolyte Innovation: Utilizing a patented high-conductivity polymer, the ionic conductivity is increased by over 30%, ensuring extremely low ion migration impedance at high frequencies.

Anode Foil Optimization: Through electrochemical etching, a tunnel-like porous structure is formed, maximizing the effective surface area and improving the instantaneous charge throughput.

Low internal resistance construction: A low-resistance design throughout the entire process, from the aluminum case and rubber plug to the leads, reduces unnecessary parasitic resistance and inductance.

- Data verification and reliability statement: Let the data speak for itself -

We compared the test data of YMIN VPX 25V 100μF solid capacitors before and after reflow soldering. The overall ESR change rate was controlled within a certain range. Its ESR value increase was only 15.1%. This demonstrates the product’s excellent thermal stability and process reliability, ensuring stable electrical performance even after SMT assembly.

Real-world application examples

For instance, the Baseus 65W GaN fast charger uses the YMIN VPX series, whose efficient heat dissipation and stable output perfectly embody these performance parameters in the end product.

Disassembly report: https://www.chongdiantou.com/archives/359822.html

Conclusion

For engineers pursuing ultimate performance, the ESR value of a single capacitor can be the deciding factor in the overall system performance. YMIN Electronics understands this well, and its positioning of “For capacitor applications, turn to YMIN for solutions” is based on its ability to solve complex technical problems. By providing top-tier products with ESRs as low as 20mΩ, YMIN is steadily achieving its product goal of “replacing international competitors and becoming a leading brand,” providing domestic power supply designers with superior and more reliable domestically produced chip component solutions.