A standard wireless charger, particularly those adhering to the Qi standard for charging portable electronic batteries, ultimately provides a 5V output.
Understanding Wireless Charger Voltage
When discussing the voltage of a wireless charger, it's important to clarify which voltage is being referred to: the input voltage to the charger or the output voltage from the charger to the device being charged. The provided reference specifically addresses the latter, which is the voltage delivered to power the device's battery.
Output Voltage
According to the reference, a Qi charger is designed to supply a specific power output to the portable electronic device it's charging. This power is delivered wirelessly.
- The reference states: "The Qi charger ultimately provides a 5V, 1A output to charge portable electronic batteries."
This means that while the wireless power transfer involves oscillating magnetic fields and coils, the charger's internal electronics are configured to deliver a voltage equivalent to 5 volts and a current of 1 ampere to the device's charging circuit under standard conditions.
Input Voltage (General Context)
While the reference doesn't detail the input voltage, it's worth noting that the wireless charging pad itself typically plugs into a power source.
- This input source is usually a standard wall adapter.
- Input voltages can vary depending on the region and charger design, commonly ranging from 5V (via USB) up to 12V or even 20V for higher-power chargers.
- The charger then converts this input voltage into the necessary power signal for wireless transmission and the required output specifications (like the 5V mentioned in the reference).
Qi Standard and Power Delivery
The Qi standard is a widely adopted wireless power transfer protocol. It defines how the charger (transmitter) and the device (receiver) communicate to ensure safe and efficient charging.
- The standard supports various power profiles, including the basic 5W (5V at 1A) as mentioned in the reference.
- Higher power profiles for fast wireless charging (e.g., 7.5W, 10W, 15W) also exist, which may involve negotiation between the charger and the device to deliver higher voltages and currents, but the 5V, 1A is a foundational level.
In summary, based on the reference focusing on the power delivered to the device, the voltage output by a standard Qi wireless charger to charge a portable electronic battery is 5 volts.
