SMUGDESK USB-C Female to DC 4.0x1.7mm PD Trigger Cable 20V

Portable laptop charging adapter

This USB-C female to DC 4.0x1.7mm cable lets you power laptops with a compatible barrel jack using a standard USB-C PD charger. It targets mobile professionals who want to leave the original power brick at home and charge from a single compact adapter. The built-in trigger chip handles the handshake so the charger delivers the correct voltage. No data lines are present, so the cable serves only as a power path.

Thermal and electrical behaviour

The emulator chip negotiates a fixed 20 V output and includes over-voltage, over-current, over-temperature and short-circuit protection circuits. Because the unit has no active cooling, it runs silently and adds negligible heat to the charger or laptop during normal operation. Power draw matches the connected laptop’s demand up to the charger’s rated limit. The slim profile keeps cable routing tidy on a desk or in a bag.

Upgrade context and limits

This cable replaces a proprietary barrel-type AC adapter when you already own a USB-C PD source capable of supplying 20 V. It is not suitable for laptops that require a different voltage or a DC plug size other than 4.0x1.7mm. Buyers who need data transfer, video output or charging at voltages other than 20 V should look for a full-featured USB-C dock or multi-voltage trigger cable instead.