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Gallery View: Greater power, speed in upcoming wireless charging modules
Global SourcesUpdated on 2023/12/01
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by Vianie Li & Cecile de Veyra
Manufacturers of wireless charging modules in China are focusing on the rollout of fast-charging types with a rated power above 20W. They are eyeing the intersecting 5G and artificial intelligence (AI) technologies that will drive trends in mobile and wearable electronics, smart home systems, robotics and electric vehicles. From this, the expected product announcements will be highlighting more functionality, which corresponds to a higher need for power.
Some Chinese suppliers have started introducing 20W-rated wireless charging modules with 12 to 15VDC input voltage, 50 to 150kHz frequency and 10mm maximum transmission distance. On the receiving side, output voltage is 5 to 12VDC and maximum output current 1.6A at 12VDC, 20W.
Mainstream selections currently have 5 or 7V input voltage and 15W maximum rated power. These are compliant with Qi, PMA and A4WP standards, with Qi units dominating supply.
Companies are continuing to offer customization services. This is because they are generating a sizeable amount of business from this strategy as such orders represent between 30 and 70 percent of total shipments.
Domestically sourced wireless charging coils, magnets, PCBs and passive components are used, while chips are also sourced from foreign providers. Input costs increased slightly in 2020, forcing some manufacturers to raise product prices by up to five percent. Not much fluctuation is expected throughout 2021.
75 to 80% efficiency
Shenzhen Jibang Technology Co. Ltd's Ultrathin Wireless Fast Charging Module has 5VDC 2A or 9VDC 1.67A input, 5VDC 1 to 1.2A or 9VDC 1A to 1.1A output and 75 to 80 percent efficiency. Charging distance is 0.5 to 8mm. Module thickness is 1.3mm and diameter 60mm. The USB assembly is 28x14x6.5mm.
The 500-unit minimum order has a seven-day lead time.
110 to 205kHz operating frequency
The Three Coils Wireless Fast Charging Module from Shenzhen Jibang Technology Co. Ltd has 5VDC 2A or 9V 1.67A input, 5VDC 1A or 9VDC 1A output, 110 to 205kHz operating frequency and ≥70 percent efficiency. Charging can be done from a distance of 5 to 8mm.
The minimum order quantity is 500 units. Delivery takes seven days.
Single coil, 5, 7.5, 10W output power
This single-coil 5, 7.5 or 10W wireless charging module from Shenzhen Ucool Technology Co. Ltd, the LK-1, has 9V, 1.67A input and 30mm charging distance.
An order of at least 500 units is delivered within 10 days.
Three coils, 5, 7.5, 10, 15W output power
This three-coil wireless charging module from Shenzhen Ucool Technology Co. Ltd, the LK-3, has 5V 2A or 9V 1.67A input and 5, 7.5, 10 or 15W output power. It can charge a device from a distance of 15mm.
The minimum order of 500 units is delivered within 10 days.
110 to 205kHz frequency
From Zhongshan Kingrong Electronics Co. Ltd, this KT1007S wireless charging module has 5VDC, 1.2A input, 110 to 205kHz frequency and 70 percent efficiency. Output power is 5 to 15W and standby power consumption 100 to 300mW. The 21.5g unit, measuring 52x43x10.5mm, has a ≤7mm launch distance.
The supplier requires a 500-unit minimum order for delivery within 15 days.
100 to 300mW standby power consumption
This 7.5W wireless charging module from Zhongshan Kingrong Electronics Co. Ltd, the KT1007A-2, has 5VDC, 1.5A input, 100 to 205kHz operating frequency, 100 to 300mW standby power consumption, ≥65 percent efficiency and ≤10mm launch distance. Dimensions are 60x54x5.3mm and weight is 24g.
The minimum order is 500 units. Delivery lead time is 15 days.
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