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Extra Info: SW3516, SW3518 (DCDC w/ PD3, PPS, QC3)

SW3516, SW3518 Datasheet, Register Map and Schematic

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The SW3516 and SW3518 are quite interesting DCDC step-down converters with support for PPS/ PD3/ PD2/ QC4/ QC3/ QC2/ AFC/ FCP/ SCP/ PE2/ PE1 and SFCP fast charging (+ VOOC for SW3518). They can deliver up to 20V 3A, even on the QC output, which makes it a rare "class B" capable device. The input voltage must be higher than the ouput and can range from 6-40V. You can get them on lcsc and modules on aliexpress. They often use the AON7534 30V 20A 5mOhm N Channel mosfet from A&O, so use 28V input voltage at most.

The general datasheet is available on lcsc, but register maps and schematic description are not. I found images on baidu and them into a pdf. All files are chinese only, use google translate for your phone or some other service which allows you to translate a picture.

I don't plan on designing my own circuit; I just wanted to share the information and files I had.

SW3516.pdf

datasheet from lcsc: https://lcsc.com/products/PMIC-Battery-Management_612.html?q=SW351

Adobe Portable Document Format - 1.70 MB - 12/28/2020 at 17:21

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SW3518.pdf

datasheet from lcsc: https://lcsc.com/products/PMIC-Battery-Management_612.html?q=SW351

Adobe Portable Document Format - 1.70 MB - 12/28/2020 at 17:21

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SW35xx_reg.pdf

register map

Adobe Portable Document Format - 1.91 MB - 12/28/2020 at 17:21

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SW351x_app.pdf

appnote & schematic

Adobe Portable Document Format - 1.46 MB - 12/28/2020 at 17:21

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1.jpg

not affiliated with store, picture taken from: https://www.aliexpress.com/item/4000186077208.html

JPEG Image - 173.32 kB - 12/28/2020 at 17:21

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