VOOC

The OPPO VOOC (Voltage Open Loop Multi-step Constant-Current Charging) Flash Charging system is a proprietary rapid-charge technology created by OPPO Electronics.[1] 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.[2] 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.[3]

OPPO also licenses its technology to OnePlus and Vivo through another brand of its holding company BBK Electronics. VOOC 2.0 has been licensed to OnePlus as the Dash Charge technology.[4] A single-cell, 30-watt (5v/6A) version of SuperVOOC has also been licensed to OnePlus as Warp Charge.[5] OnePlus does not market its phones as VOOC-compatible despite the fact that VOOC 2.0 and Dash are compatible.[4] In June 2019 Vivo teased Super FlashCharge technology capable of up to 120W charging.[6]

As of July 2019, 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.[7]

Versions

As of 2019, VOOC comes in three variations:

  • VOOC 2.0, which operates at 5v/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.[8]
  • SuperVOOC (2018), a successor of VOOC 2.0 with 10v/5A. It charges a two-cell battery in series.[9]

Devices
Dash Charge for OnePlus 5
  • VOOC 3.0 is supported by Oppo F11, Oppo Reno series, Realme 5 Pro, Oppo F-15 . [8]
  • SuperVOOC is supported by the Oppo Find X,OPPO R17 Pro and Realme X2 Pro.[9]
    • Warp Charge is supported by the OnePlus 7.[5]
  • VOOC 2.0 is supported by OPPO R6 through Oppo R15, by F1 (Find 1) Plus through Find X, Realme 3 Pro, Realme X, and Oppo N3.[10][11][12]
    • OnePlus devices since OnePlus 3 support Dash Charge, claiming to charge "a day's power in half an hour".[13]

All models reported include the "s" (or OnePlus "T"), 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.[14] 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.[15] Without such communication, the charger runs at a limit of 5v/1.5A.[16]

On the Android phone end, the VOOC communication code is open source under GNU General Public License (GNU GPL) version 2 as a part of the modified Linux kernel, and has been used by custom ROMs like Lineage OS.[17] The firmware code for PIC16F microcontrollers on the "VOOC IC" is also defined in the code.[18][19] There is some rudimentary documentation provided by OnePlus, which mentions a BQ27541 battery gauge chip made by Texas Instruments, with Dash-specific protocol extensions.[20] 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.[18]

Other charging technology

References
  1. https://wccftech.com/oppo-super-vooc-fast-charging-explained/%7Ctitle=Oppo Super VOOC Fast-Charging Explained|access-date=6 March 2020
  2. "VOOC fast charging - everything you need to know". Android Authority. 2016-04-23. Retrieved 2017-04-11.
  3. Martin, Taylor (2014-05-20). "Every smartphone needs rapid charging". Pocketnow. Retrieved 2017-04-11.
  4. "Dash Charge for OnePlus 3 explained". Android Central. Retrieved 2017-04-11.
  5. "All you need to know about OnePlus' 30W Warp Charge standard". Android Central. 24 May 2019.
  6. Byford, Sam (2019-06-20). "Vivo's Super FlashCharge tech fills a 4,000mAh phone in 13 minutes". The Verge. Retrieved 2019-08-20.
  7. "OPPO与八家企业签署VOOC闪充专利许可协议 - oppo 欧珀手机". cnBeta (in Chinese). Retrieved 30 July 2019.
  8. John, Jed (22 March 2019). "OPPO Reno comes with VOOC 3.0 which improves fast charging speed by 23.8%". Gizmochina.
  9. Byford, Sam (10 October 2018). "Oppo has the fastest fast charging we've ever seen". The Verge.
  10. "OPPO VOOC Flash Charge, Quick Charge - OPPO Global - OPPO Global". www.oppo.com. Retrieved 2017-04-11.
  11. "Oppo A3s is official with 4,230 mAh battery and 6.2-inch notched display". xda-developers. 2018-07-13. Retrieved 2018-07-14.
  12. "OPPO R11 support VOOC Flash Charge". www.oppo.com. Retrieved 2017-06-10.
  13. "OnePlus 3T". oneplus.net. Retrieved 2017-04-11.
  14. "If your OPPO phone won't flash charge". OPPO Global. Retrieved 2019-06-02.
  15. sbooth. "What is the OnePlus 3 DASH charging/sync cable doing internally?? Let's probe it!". OnePlus Community.
  16. "Dash Charge protocol analysis". XDA Developers.
  17. "drivers/power/oppo in LineageOS/android_kernel_oppo_msm8974". GitHub. LineageOS. 29 May 2019.
  18. "drivers/power/oppo in oppo-source/FindX-8.1-kernel-source". GitHub. 24 May 2019. Retrieved 2 June 2019.
  19. "oneplus_fastcg.c in OnePlusOSS/android_kernel_oneplus_msm8998 (branch 5T)". GitHub. OnePlus Open Source Software. 2 June 2019. Retrieved 2 June 2019.
  20. "oneplus_fastcg.txt in OnePlusOSS/android_kernel_oneplus_msm8998". GitHub.
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