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Small green circuit board with USB-C port and 5.5x2.1mm DC barrel jack

KEHIPI

KEHIPI DC5521 5.5x2.1mm 65W USB-C PD Step-Down Module

SKU CH-ZNCF-8JK8E

A step-down module converting 8–30 V DC to USB-C PD 65 W with a 5.5×2.1 mm barrel output

  • ColorWith DC 5.5X2.1 USB
  • Delivers up to 65W fast charging via USB-C PD 3.1 and QC 3.0
  • Accepts wide 8–30V DC input for flexible power-source compatibility
  • Achieves 92–97% conversion efficiency reducing heat and energy loss
  • Comprehensive protection suite guards against over-voltage, over-current, short-circuit and over-temperature
  • Fitted with 5.5 × 2.1 mm DC barrel connector for direct device connection

DC 5.5×2.1mm 65W USB-C PD Step-Down Module

This compact step-down module converts a DC input of 8 to 30 volts into a USB-C Power Delivery output up to 65 watts. It supports PD3.1 PPS and QC3.0 protocols, automatically negotiating voltages from 3.3 to 21 volts with a connected device. The 5.5 mm outer and 2.1 mm inner diameter barrel jack suits many laptop and router power supplies.

Installation notes and common issues

Wire the barrel plug to a DC source between 8 and 30 volts, observing polarity, then connect the USB-C cable to the target device. The supplier advises powering on the source supply before attaching the module when using a 20 to 24 volt adapter; otherwise the module may not trigger the full 20 volt 3.25 amp profile. Built-in protections cover input over-voltage, under-voltage, over-current, output short-circuit and over-temperature.

Capacity and headroom

Maximum output is 20 volts at 3.25 amps, delivering 65 watts with conversion efficiency between 92 and 97 percent. The module only steps down, so the input voltage must exceed the negotiated output voltage; 20 volt fast charging requires an input above 20 volts. Ripple is specified at 200 mV and no-load current below 3 mA. It cannot boost lower voltages or supply more than 65 watts.

Highlights

  • Delivers up to 65W fast charging via USB-C PD 3.1 and QC 3.0
  • Accepts wide 8–30V DC input for flexible power-source compatibility
  • Achieves 92–97% conversion efficiency reducing heat and energy loss
  • Comprehensive protection suite guards against over-voltage, over-current, short-circuit and over-temperature
  • Fitted with 5.5 × 2.1 mm DC barrel connector for direct device connection

Specifications

BrandAITRIP
ModelDC5521
ColorWith DC 5.5X2.1 USB

Questions about this item

How can I verify the module is delivering the full 65W after wiring it up?

Connect a USB‑C PD3.1 or QC3.0 device that requests 20V 3.25A; the module will negotiate that voltage automatically when the input is above 20V.

What comes in the package and what must I source separately?

One DC5521 module with a 5.5×2.1 mm barrel plug is included; you must supply an 8–30 V DC source and a USB‑C cable.

Should I choose the 5521 or 5525 version for my 5.5 mm jack?

Pick 5521 if your jack’s inner diameter is 2.1 mm; pick 5525 if it is 2.5 mm — both share the same 5.5 mm outer diameter.

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