CTP9 Fast Charge Decoy PD/QC 9V12V15V20V Type-C to DC Router ONU 5A

CTP9 fast charge decoy module Product Overview

The CTP9 fast charge decoy module is a voltage trigger module based on PD and QC protocols. It can “decoy” the voltage from a fast charger or power bank and output it as a stable DC power source. The module offers four fixed voltage options — 9V, 12V, 15V, and 20V — which can be set by shorting the corresponding solder pads on the PCB. No programming is required. It supports up to 5A current.It is widely used for converting traditional DC‑powered devices like routers, ONUs, and set‑top boxes to Type‑C power, as well as for DIY power supplies, electronics projects, and outdoor power applications.

CTP9 fast charge decoy module Core Features

Voltage Triggering with Broad Protocol Support： The module communicates with the fast charger via a built‑in protocol chip to actively request the specified output voltage. It supports mainstream fast charging protocols including PD3.0/2.0 (5V/9V/12V/15V/20V) and QC3.0/2.0 (5V/9V/12V), making it compatible with most fast chargers and power banks on the market.

Four Fixed Voltage Options： Offers 9V, 12V, 15V, and 20V fixed voltage levels, set by shorting the corresponding solder pads on the PCB. Simple and intuitive — no programming or external controller required.

Auto Step‑Down Protection： If the set voltage exceeds the charger‘s maximum capability, the module automatically steps down to the highest supported voltage, preventing abnormal operation or damage.

Type‑C Input, DC Output： Features a Type‑C input port and solder pads/terminal outputs. Users can connect a DC plug or solder wires directly. This allows traditional DC‑powered devices to be converted to Type‑C power.

High Current Support： Supports up to 5A output current (determined by the charger and load), sufficient for routers, ONUs, set‑top boxes, small fans, LED lighting, and most low‑power devices.

Ultra‑Compact Size for Easy Integration： The module measures approximately 23×11.5mm, making it easy to embed inside devices or use as an external adapter.

CTP9 fast charge decoy module Applications

Router/ONU Type‑C Power Retrofit： Convert traditional DC‑powered routers, ONUs, and set‑top boxes to Type‑C power. Use a fast‑charging power bank or charger to power them, eliminating bulky power adapters.

DIY DC Power Supply： Turn a fast charger or power bank into an adjustable DC power source for electronics projects and experiments, providing 9V/12V/15V/20V output.

Outdoor Power Supply： Use a power bank to power routers, ONUs, or small devices in the field without needing a wall outlet.

CTP9 fast charge decoy module Key Advantages

One Board, Multiple Voltages – Say Goodbye to Multiple Adapters： A single small board converts a fast charger into multiple voltage outputs (9V, 12V, 15V, 20V), eliminating the need to carry multiple power adapters for different devices.

Solder‑and‑Go, No Programming Required： Simply short the corresponding solder pads with a soldering iron to set the desired voltage — no firmware flashing, no code writing. The fixed 9V/12V/15V/20V options are clear and straightforward.

Auto Step‑Down Protection for Safe Operation： Built‑in intelligent step‑down protection automatically adapts to a lower voltage if the set voltage exceeds the charger‘s capability, preventing damage to the charger or module.

Breathe New Life into Old Devices： Upgrade your old routers, ONUs, and set‑top boxes to Type‑C power with a single Type‑C cable, eliminating messy traditional power supplies.

Compact and Plug‑and‑Play Ready： Measuring only about 23×11.5mm, the module can be embedded directly inside devices or used as an external decoy head with a Type‑C to DC cable

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FAQ

1. What is the CTP9 fast‑charge decoy, and what is it used for?
The CTP9 is a PD/QC fast‑charge protocol decoy module. It communicates with a standard USB‑C or USB‑A fast charger to request a fixed voltage such as 9 V, 12 V, 15 V, or 20 V, and outputs it through a DC barrel jack or screw terminal. Its most common use is to repurpose spare phone fast chargers as stable power supplies for routers, ONUs, LED strips, fans, or development boards—eliminating the need for separate DC adapters and making it ideal for cable management, temporary power, and portable setups.

2. Which fast‑charge protocols does it support? Will it work with both PD and QC?
The CTP9 typically supports both USB Power Delivery (PD) and Qualcomm Quick Charge (QC) protocols. For PD chargers, it can request fixed voltage levels such as 9 V, 12 V, 15 V, and 20 V. For QC2.0/3.0 chargers, it can trigger 9 V or 12 V output. Before use, always verify that your charger supports the required protocol and voltage level, otherwise it may not increase the voltage and will only output 5 V.

3. How do I set the output voltage—9 V, 12 V, 15 V, or 20 V? How do I switch between them?
The module typically includes a button, dip switch, or solder pads for manually selecting the target voltage. Before powering the module on, set the desired voltage according to your device’s requirements, then reconnect power—the decoy will re‑negotiate the voltage with the charger. Some versions automatically remember the last selected level. Always disconnect the load before changing the voltage to avoid sending a high‑voltage spike to downstream equipment.

4. Is the rated 5 A maximum current realistic? What can I expect in practice?
The “5 A” rating refers to the module’s maximum pass‑through capability, provided your charger can supply the corresponding current. For example, 20 V/5 A requires a charger that supports 100 W PD output. Actual load capacity also depends on the quality of the DC connectors, cables, and terminals. It is recommended to run the module under full load for a period to verify normal temperature rise and solid connections. For typical routers and ONUs drawing only 0.5–2 A, the module operates far below its limit.

5. Can one decoy power multiple devices at the same time?
Yes, but you will need an external DC splitter cable. The module itself provides a single output port. As long as the combined current of all connected devices does not exceed the charger’s and decoy’s ratings, they can be powered in parallel. Make sure all devices operate at the same voltage (e.g., all 12 V); otherwise, you must use a separate decoy and charger for each different voltage.

6. Can it power an ONU, router, or network switch? How do I choose the correct voltage?
Absolutely. Most home routers and ONUs run on 9 V or 12 V DC, typically drawing 0.5–2 A. Use a multimeter to check the original adapter’s output voltage and polarity (usually center‑positive), then set the decoy to the same voltage and connect with a suitable DC adapter plug. If you are unsure of the device’s voltage, check the label on the unit before connecting power.

7. Will the decoy damage my charger or downstream equipment? What safety protections are in place?
Qualified decoys include over‑voltage protection, under‑voltage lockout, and over‑current protection. The charger itself also has output short‑circuit and overload protection. As long as you set the correct voltage, observe proper polarity, and stay within current limits, operation is safe. The greatest risk comes from human error—such as feeding 20 V into a 5 V device or reversing the input polarity. Always double‑check voltage settings and secure all connections before applying power.

8. If I already have a charger, why do I need this decoy? Can't I just use the original power adapter?
The decoy solves two key problems: power consolidation and reuse. A typical network cabinet is packed with individual bulky adapters for the ONU, router, switch, and other gadgets, creating clutter. By using a single multi‑port high‑power PD charger and several decoys, you can power everything with neat DC cables, dramatically simplifying wiring. It also gives a second life to old fast chargers, reducing electronic waste.

9. What input and output connectors does the module have? Will I need to buy extra cables?
The input is usually a USB‑C receptacle or a USB‑A plug that connects directly to the charger. The output is typically a standard DC barrel jack (e.g., 5.5 mm × 2.1 mm or 5.5 mm × 2.5 mm) or screw terminals. Depending on your devices, you may need to purchase additional DC adapter plugs or splitter cables. Some modules include a few common adapters—check the included accessories before ordering.

10. What safety precautions should I observe when using this decoy?
① Always set the voltage before connecting the load—never switch voltage while under power. ② Confirm the charger’s supported voltage and power ratings, and do not exceed them. ③ Observe the DC output polarity (usually center‑positive) and never reverse it. ④ The module generates some heat during operation; at high power, ensure adequate ventilation. ⑤ For sensitive or expensive equipment, use the original certified adapter whenever possible; treat the decoy as a backup or experimental solution.