A 23W charger is typically considered a fast charger for smartphones and is often associated with devices like the Google Pixel series (e.g., Pixel 6 Pro, Pixel 7 Pro).
Here are 5 key points about a 23W charger:
Fast Charging Speed: 23W provides a good balance between charging speed and battery health. For phones that support it (like the Pixel Pro models), it can typically charge the battery up to about 50% in roughly 30 minutes (actual time varies by phone model, battery size, and condition).
Protocol Requirement (USB PD PPS): To reach the full 23W peak charging speed, the charger must usually support the USB Power Delivery (PD) standard and specifically the Programmable Power Supply (PPS) protocol. A standard USB-PD charger without PPS may result in lower charging speeds.
Variable Power Delivery: The charger does not maintain 23W for the entire charging cycle. The peak power (up to 23W) is usually delivered when the battery is low (e.g., below 50%). As the battery level increases, the charging speed gradually decreases to protect the battery and prevent overheating (e.g., dropping to 9W-15W above 50%).
Temperature Management: The power reduction (point 3) is a crucial aspect of managing heat. Fast charging generates heat, and slowing the charge rate as the battery fills up helps maintain a safe operating temperature for the phone and extends the battery’s lifespan.
Compatibility Considerations: While it can charge any USB-C device, you need a device that is engineered to accept ≈ 23W to benefit from the speed. Using this charger with a device that only supports a lower maximum (e.g., 18W or 15W) will result in the device charging at its lower maximum speed.
Charging Protocol: Most likely uses a modern, universal standard like USB Power Delivery (USB PD), often with Programmable Power Supply (PPS) support. PPS allows the charger and device to negotiate power in small increments for more efficient, lower-heat charging.
Input (Wall Power): Typically 100–240V, 50/60 Hz (standard international compatibility).
Output Voltage/Current Combinations: To achieve 23W, the charger will dynamically adjust the voltage (V) and current (A).
Common PD Voltage/Current: It would likely use a common PD voltage such as 9V and a current around 2.56A (9V×2.56A≈23W).
PPS Output: If supporting PPS, it will have a flexible voltage range to deliver power, which could be in the range of 3.3V to 11V or 3.3V to 16V with varying current up to around 3A to achieve 23W.
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