OPPO VOOC, also known as Dash Charge on OnePlus devices and Dart Charge on Realme devices, is a proprietary rapid-charge technology created by BBK Electronics. In contrast to USB Power Delivery and Qualcomm Quick Charge technology, which increases the voltage during fast charging, VOOC uses a higher current than normal USB 2.0 charging; VOOC operates at 5 volts and 4 amperes to match the internal battery voltage, which removes the need of regulating the voltage inside the mobile phone, which would produce additional unwanted heat. 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, OPPO claims, improves the speed and safety of the charge. VOOC 2.0 has been licensed to OnePlus as the Dash Charge technology. A single-cell, 30-watt version of VOOC 4.0 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. In June 2019 Vivo teased Super FlashCharge technology capable of up to 120W charging. , VOOC has been licensed to 14 other corporations, most of which are in the phone charging and power strip industries. OPPO claims that more than 1000 patents around VOOC have been filed worldwide.
Versions
, VOOC comes in three variations:
VOOC 2.0, which operates at 5v/4A.
VOOC 3.0, 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, a successor of VOOC 2.0 with 10v/5A. It charges a two-cell battery in series.
VOOC 4.0, a successor of VOOC 3.0, which operates at 5v/6A.
Devices
VOOC 3.0 is supported by Oppo F11, Oppo Reno series, Realme 5 Pro, Oppo F-15.
VOOC 2.0 is supported by OPPO R6 through Oppo R15, by F1 Plus through Find X, Realme 3 Pro, Realme X, and 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", Plus, and Pro" variants. Oppo's mobile DAC, Oppo H1-2SE, also features VOOC charging.
Technology
All versions of VOOC require a proprietary 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 cable to communicate through. Without such 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 General Public License 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.
Marketing
has recognised the weakness of many other mobile phones with fast charging technology to significantly slow down the charging speed during operation of the device, using it as an opportunity to promote Dash Charge enabled devices, which do not throttle the input power during operation.
