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The OPPO VOOC (Voltage Open Loop Multi-step Constant-Current Charging) Flash Charging system is a proprietary rapid-charge technology created by OPPO Electronics, which, at present, is able to charge certain OPPO devices from 0 to 75% in just 30 minutes. In contrast to Qualcomm's QuickCharge technology increasing the voltage during fast charging, VOOC uses a higher current than normal USB 2.0 charging. This, VOOC operates at 5V and 4A. The VOOC Flash Charge circuit technology reportedly lowers the temperature of the charging adapter, and creates an interface from the adapter to the phone, which improves the speed and safety of the charge.
OPPO also licenses its technology to OnePlus through another brand of its holding company BBK Electronics. VOOC 2.0 has been licensed to OnePlus as the Dash Charge technology. A single-cell, 30-watt (5V/6A) version of SuperVOOC has also been licensed to OnePlus as Warp Charge. OnePlus does not market its phones as VOOC-compatible despite the fact that VOOC 2.0 and Dash are compatible.
As of 2019[update], VOOC comes in three variations:
- VOOC 2.0, which operates at 5V and 4A.
- VOOC 3.0 (2019), a technology that claims to be 23.8% faster than VOOC and "based on a new technology". It appears to be a 5V/5A version of VOOC>
- SuperVOOC (2018), a different successor of VOOC 2.0 that churns out 10V and 5A. It charges a two-cell battery in parallel.
- VOOC 3.0 is supported by OPPO F11, Oppo Reno, and variants.
- SuperVOOC is supported by Oppo Find X.
- Warp Charge is supported by the OnePlus 7.
- VOOC 2.0 is supported by OPPO R6 through Oppo R15, by F1 (Find 1) Plus through Find X, and since Realme 3 and by Oppo N3.
- OnePlus devices since OnePlus 3 support Dash Charge, claiming to charge "a day's power in half an hour".
All models reported include the "s" (or OnePlus "t"), "Plus", "Pro" variants.
Oppo's mobile DAC, Oppo H1-2SE also features VOOC charging.
All versions of VOOC requires a special cable to work. In addition to electrical requirements like thickness for the high current, the VOOC 2.0/Dash protocol requires a fifth pin on the (USB-A to USB-C) cable to communicate through. Without such a communication, the charger runs at a limit of 5V/1.5A.
On the android phone end, the VOOC communication code is open source under GNU GPL version 2 as a part of the modified Linux kernel, and has been used by custom ROMs like Lineage OS. The firmware code for PIC16F microcontrollers on the "VOOC IC" is also defined in the code. There is some rudimentary documentation provided by OnePlus, which mentions a BQ27541 battery gauge chip made by Texas Instruments, with Dash-specific protocol extensions. The source code allows a list of parts used for the technology to be made: for example, the Find X uses a pic1508/stm8s chip on the adapter and a bq25882 two-cell charger chip on the phone. The BQ27541 gauge is exchanged for a BQ28Z610 gauge which can handle two-cell battery packs.
- "Archived copy". Archived from the original on April 2, 2015. Retrieved March 27, 2015.CS1 maint: Archived copy as title (link)
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