![]() ![]() Unlike Quick Charge 4, Quick Charge 4+ is fully backward compatible with Quick Charge C 2.0 and 3.0 devices. Dual Charge++ is mandatory, while in prior versions Dual Charge was optional. It introduces Intelligent Thermal Balancing and Advanced Safety Features to eliminate hot spots and protect against overheating and short-circuit or damage to the USB-C connector. Quick Charge 4+ was announced on June 1, 2017. Qualcomm claims Quick Charge 4 with Dual Charge++ is up to 5 ☌ cooler, 20% faster and 30% more efficient than Quick Charge 3.0 with Dual Charge+. It also features additional safety measures to protect against over-voltage, over-current and overheating, as well as cable quality detection. However, Quick Charge 4 chargers are not backward compatible with Quick Charge. It is cross-compatible with both USB-C and USB PD specifications, supporting fallback to USB PD if either the charger or device is not compatible. Quick Charge 4 includes HVDCP++, optional Dual Charge++, INOV 3.0, and Battery Saver Technologies 2. ![]() Quick Charge 4 was announced in December 2016 alongside the Snapdragon 835. Qualcomm claims Quick Charge 3.0 is up to 4–6 ☌ cooler, 16% faster and 38% more efficient than Quick Charge 2.0, and that Quick Charge 3.0 with Dual Charge+ is up to 7–8 ☌ cooler, 27% faster and 45% more efficient than Quick Charge 2.0 with Dual Charge. Battery Saver Technologies aims to maintain at least 80% of the battery's original charge capacity after 500 charge cycles. INOV is an algorithm that determines the optimum power transfer while maximizing efficiency. Quick Charge 3.0 introduced INOV ( Intelligent Negotiation for Optimal Voltage), Battery Saver Technologies, HVDCP+, and optional Dual Charge+. ![]() Quick Charge 2.0 introduced an optional feature called Dual Charge (initially called Parallel Charging), using two PMICs to split the power into 2 streams to reduce phone temperature. To use Quick Charge, both the host providing power and the device must support it. voltage negotiations between device and charger) has been reverse-engineered, and a custom voltage can be manually requested from the charger using a trigger circuit that simulates the negotiation to an end device. Though not publicly documented, the protocol (e.g. Ĭircuit board to simulate QuickCharge voltage request signals Numerous other companies have their own competing technologies, including MediaTek Pump Express and OPPO VOOC (licensed to OnePlus as Dash Charge), the latter of which elevates the current rather than the power supply voltage, relying on thicker USB wires to handle the current without overheating, as described in VOOC § Technology. The elevated voltages allow for pushing higher amounts of power (wattage) through the cable's copper wires without further heating them up and risking heat damage.Īnother benefit of the elevated voltage, as described in Ohm's law, is its improved ability to pass through longer USB cables due to its compensation of voltage drops from wires with higher resistances. Quick Charge is a proprietary technology that allows for the charging of battery-powered devices, primarily mobile phones, at power levels exceeding the 5 volts at 2 amps, thus 10 watts allowed by basic USB standards-not considering the USB Power Delivery (USB PD) standard-while still maintaining compatibility to existing USB wires. ![]()
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