USB-C vs USB-A

USB-C is the modern standard for fast charging. Unlike USB-A, USB-C:

• Supports higher power delivery (up to 240W with PD 3.1)
• Is reversible (no wrong way to plug in)
• Supports data, video, and power over one cable
• Is the standard for all modern phones, tablets, and laptops

PD (Power Delivery)

USB PD is the universal fast-charging standard over USB-C:

• Negotiates optimal voltage and current between charger and device
• Supports 5V, 9V, 15V, 20V (and 28V/36V/48V with PD 3.1)
• Maximum 100W (PD 3.0) or 240W (PD 3.1 EPR)
• Used by Apple, Dell, Lenovo, HP, and most laptop brands

PPS (Programmable Power Supply)

PPS is an extension of PD 3.0 that enables dynamic voltage adjustment:

• Allows the device to request precise voltage in 20mV steps
• Reduces heat and improves charging efficiency
• Required for Samsung Super Fast Charging 2.0
• Look for PPS support if you have Samsung devices

Quick Charge

Qualcomm Quick Charge (QC) is an alternative fast-charging protocol:

• QC 4+ is compatible with USB PD
• Older QC versions (QC 2.0, 3.0) are being phased out
• Most modern chargers support both PD and QC 4+

Ensuring Fast Charging

To get fast charging, you need:

1. A charger that supports your device’s protocol (PD, PPS, QC)

2. A cable rated for the required power (5A for 100W+)

3. A device that supports fast charging

4. The correct wattage for your device

All Powgent GaN chargers support PD 3.0, PPS, and QC 4+ for universal compatibility.