ChargerLAB recently completed an in-depth teardown of the DJI Power 140W 2C1A GaN charger. This first 140W high-power GaN fast charger from DJI employs a PFC+AHB professional power architecture, is compatible with the PD3.1 fast charging protocol, and boasts a maximum output power of 140W. It is compatible with DJI drones, action cameras, and handheld gimbals, and features intelligent power allocation technology that automatically and dynamically adjusts power when multiple devices are charging simultaneously. A key highlight of this teardown is the complete integration of domestically produced Yongming capacitors into the entire output filtering circuit. This signifies Yongming components' formal deep integration into DJI's high-end drone fast charging ecosystem, realizing the practical application of domestically produced aluminum electrolytic capacitors in the field of high-power imaging power supplies.

I. Component Testing: NPX Solid-State Capacitor + LKF Liquid Capacitor Combination

The DJI 140W GaN charger's output filter circuit utilizes a combination of two Yongming capacitor series. Solid-state capacitors handle high-power ripple suppression, while automotive-grade liquid capacitors ensure long-term high-temperature reliability. This dual-solid-state design addresses the high-frequency pain points of fast charging.

1. NPX Polymer Solid-State Capacitor (Main Output Filtering Component)

The circuit incorporates one 35V 330μF and two 35V 470μF Yongming NPX solid-state capacitors, forming the core of the overall filtering system.

This series of capacitors features miniaturization, extremely low ESR, high ripple current tolerance, a rated operating temperature of 105℃, and a standard lifespan of 2000 hours. Voltage ranges from 6.3V to 100V, and capacitance ranges from 2.2μF to 10000μF. The compact package perfectly fits the charger's limited PCB layout. Facing load fluctuations caused by continuous 140W high-power output and dynamic power switching across multiple interfaces, it can efficiently filter out power conversion ripple, ensuring stable and jitter-free charging voltage.

Two compatible specifications:

- 35V 330μF: 6.3×15mm

- 35V 470μF: 8×10mm

2. LKF Automotive-Grade Liquid Aluminum Electrolytic Capacitor (Long-Lasting Reliability Solution)

The charger is also equipped with one 35V 470μF Yongming LKF series liquid capacitor. This series is AEC-Q200 automotive-grade certified, supports stable operation over an ultra-wide temperature range of -55℃ to 105℃, and has a lifespan of 7000~10000 hours at 105℃, far exceeding the standard for conventional consumer-grade capacitors.

For drone chargers operating in harsh environments with enclosed bodies, limited heat dissipation, and prolonged operation in high outdoor temperatures, the LKF series significantly extends the overall service life of the device, mitigating risks such as high-temperature aging and unstable power supply.

Specifications: 35V 470μF, Dimensions 10×16mm

Synergistic Value of the Dual Series

NPX solid-state capacitors address the three major pain points of high-power fast charging: high ripple, limited space, and instantaneous load fluctuations. LKF automotive-grade liquid capacitors enhance performance with wide temperature tolerance and ultra-long lifespan. The combination of these two technologies perfectly suits the high-temperature, high-power, and dynamic load conditions of drone gallium nitride chargers, ensuring long-term stable power supply.

II. Yongming Capacitors' All-Scenario High-Power Power Supply Solution

The application of DJI's 140W fast charging is just one typical example of Yongming Capacitors' capabilities in the high-end high-power power supply market. Leveraging its comprehensive capacitor product line encompassing NPX, LKF, VPX, VPT, multilayer polymers, and KCX/KCG, Ymin can cover the domestic selection needs of various high-power devices:

1. Drone Support: Drone fuselage power supplies, GaN fast chargers, outdoor charging equipment, handheld gimbal chargers

2. Imaging & Digital Devices: Action camera adapters, fast charging power supplies for imaging equipment

3. High-Power Power Supplies: GaN multi-port fast chargers, outdoor energy storage power supplies, robot built-in power systems

4. General Smart Hardware: High-power smart terminal adapters, high-density switching power supplies

The entire product line addresses common industry pain points: excessive ripple during high-power output, unstable power switching across multiple interfaces, limited PCB space, insufficient heat dissipation, lifespan degradation under high-temperature conditions, and power supply fluctuations.

III. Supporting Services and Selection Assistance

Ymin provides power supply manufacturers with complete domestic support services: free product specifications, electrical performance test reports, and on-device sample testing; engineers can customize capacitor selection solutions based on equipment power, temperature, and size requirements.

Recommended Core Models at a Glance

1. NPX Solid-State Capacitors: 35V 330μF (6.3×15mm), 36V 470μF (8×10mm)

2. LKF Automotive-Grade Liquid Capacitors: 35V 470μF (10×16mm), 36V 471μF (12.5×14mm)

3. VPX Solid-State Capacitors: Ultra-small size, high capacitance, standard 6.3×5.8mm package

4. VPT Wide-Temperature Solid-State Capacitors: -55℃~125℃ operating range, minimum ESR 36mΩ

5. Multilayer Polymer Capacitors: Extremely low ESR, as low as 3mΩ, suitable for ultra-high power filtering

6. KCX/KCG High-Voltage Liquid Capacitors: Suitable for high-voltage filtering scenarios at power input.