The voltage of Type-C Power Delivery (PD) can vary, but it has a maximum of 20 volts.
Understanding USB Type-C Power Delivery (PD)
USB Type-C Power Delivery is a fast-charging protocol that allows devices to negotiate higher voltage and current levels to charge faster. Here's a breakdown:
- Standard USB-C: A regular USB-C cable supports at least 3 amps of current at various voltage levels, typically up to 5V.
- USB-C PD: According to the USB PD specification, USB-C cables can support a higher voltage up to 20 volts to deliver more power. This higher voltage, combined with varying current levels, allows for greater wattage to charge larger devices, such as laptops.
- Current Options: While the voltage maximum is 20V, USB-C PD also supports different current levels. Most standard cables support 3A but some high-end cables may support up to 5A.
- Power Levels: Based on voltage and current a maximum of 60 Watts of power delivery using 3A at 20V is supported on standard cables. Some cables can also support up to 100W using 5A and 20V.
Voltage and Power Delivery Table
| Specification | Voltage | Current | Max Power |
|---|---|---|---|
| Standard USB-C | Up to 5V | Min 3A | 15W |
| USB PD | Up to 20V | Up to 5A | Up to 100W |
Practical Insights
- Negotiated Voltage: Devices and chargers negotiate the optimal voltage and current levels based on their capabilities and needs. This means that while the maximum voltage for USB-C PD is 20V, the actual voltage being used will vary.
- Device Compatibility: Not all USB-C devices support the full 20V/5A capacity. Check the power specifications of your device and charger to ensure compatibility.
- Cable Quality: Use high-quality cables that are specifically rated for the desired power delivery levels.
- Safety: USB-C PD includes safety features to protect devices from overcharging or damage.
Conclusion
The maximum voltage for Type-C Power Delivery (PD) is 20 volts, enabling faster charging speeds and higher power delivery for compatible devices. Always use certified cables and chargers that meet the specifications of your device.
