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Small black rectangular DC-DC converter with short input leads and a USB-A output socket, sealed to IP68

LyiCKhKK 11V-90V 5V 3A 15W IP68 USB Step-Down Power Adapter

SKU CH-BF40-8NN9T

Converts 11-90V DC input to 5V 3A USB output with IP68 waterproofing and over-current protection

  • ColorSingle mini
  • Converts 11-90 V input to stable 5 V 3 A USB power
  • Delivers up to 15 W with over 93 % conversion efficiency
  • IP68 waterproof rating protects against dust and immersion
  • Built-in over-current, overheat and short-circuit protection
  • Operates from -40 to 80 °C with automatic thermal derating

Wide-Input USB Step-Down Adapter

The LyiCKhKK 11V-90V 5V 3A 15W IP68 USB Step-Down Power Adapter converts a wide DC input range into a stable 5 V USB supply. It delivers up to 3 A for charging phones, GPS units or other 5 V devices from vehicle or industrial power sources. The non-isolated module achieves over 93 percent conversion efficiency. Over-current, overheating and short-circuit protections are built in.

Replaces Bulky Inverters or Fixed-Voltage Chargers

This adapter replaces separate 12 V, 24 V, 36 V, 48 V, 60 V or 72 V chargers with a single unit covering 11 V to 90 V input. The jump is worth it when you need one compact, waterproof converter for multiple vehicle voltages instead of carrying several dedicated chargers. It supplies 15 W maximum output with automatic current adaptation up to 3 A. Voltage regulation stays within ±1 percent and load regulation within ±2 percent.

Check Your Source Voltage and Connector Needs

Verify that your DC source stays within the 11 V to 90 V range before connecting. The input lead is 13 cm to 14 cm long and the USB output lead is 35 cm. Confirm the USB plug type matches your device because the adapter provides a female USB-A port only. Operating temperature spans -40 °C to 80 °C; above 40 °C reduce load or improve heat dissipation. The IP68 rating protects against dust and water ingress.

Highlights

  • Converts 11-90 V input to stable 5 V 3 A USB power
  • Delivers up to 15 W with over 93 % conversion efficiency
  • IP68 waterproof rating protects against dust and immersion
  • Built-in over-current, overheat and short-circuit protection
  • Operates from -40 to 80 °C with automatic thermal derating

Specifications

BrandLyiCKhKK
ModelLyiCKhKK
Part NumberLyiCKhKK
ColorSingle mini

Questions about this item

What input-voltage range does the 11 V–90 V model accept?

The unit operates from 11 V to 90 V DC, covering 12 V, 24 V, 36 V, 48 V, 60 V and 72 V vehicle systems.

How do I connect the 13–14 cm input leads and 35 cm USB output without reversing polarity?

Splice the red input wire to positive and the black wire to negative on the source; the USB-A socket then delivers 5 V at up to 3 A.

Will the IP68 rating survive continuous immersion if the converter runs hot above 40 °C?

IP68 protects against dust and water ingress; above 40 °C ambient you must reduce load or add heatsinking to stay within the 80 °C limit.

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