JacobsParts Inc. USBMOD-N 45W 10.5-32V DC USB-C PD QC3.0 Step-Down Power Adapter 5.5x2.1mm IP6518

USB-C PD step-down adapter

The JacobsParts USBMOD-N converts a 10.5 to 32 volt DC barrel input into a 45 watt USB-C Power Delivery or USB-A Quick Charge 3.0 output. It is aimed at makers and integrators who need to add fast charging to existing 12 or 24 volt DC systems such as vehicle electrics, solar setups or industrial power rails. The module uses an IP6518 controller to negotiate voltage automatically from 3 to 20 volts. Only one output port may be active at a time.

Thermals and efficiency

The buck converter achieves up to 97 percent conversion efficiency, which keeps heat low during typical loads. Cable resistance compensation helps maintain voltage accuracy at the device end of the cable. Because the input must sit at least 2 volts above the negotiated output, the adapter draws minimal overhead when the source voltage is well matched to the required output level. No active cooling is fitted, so adequate airflow around the 50 by 20 by 17 millimetre body is recommended for sustained high-power operation.

Upgrade path and limits

This adapter replaces fixed-voltage USB chargers that cannot negotiate higher PD profiles or that lack QC 3.0 support on the Type-A port. It is a worthwhile jump when the source supply is a stable DC rail between 10.5 and 32 volts and the load requires flexible voltages up to 20 volts at 2.3 amps. It is not suitable for buyers who need simultaneous USB-C and USB-A charging, or for systems where the input voltage cannot stay 2 volts above the desired output voltage.