Southchip has rolled out the SC9712B, a powerhouse multi-protocol fast-charging IC featuring a highly integrated 140W dual-port SoC architecture. Tailored for 1 USB-C and 1 USB-A and multi-port charging layouts, the chip condenses a 36V synchronous buck controller, USB PD protocol engine, and DPDM decoder onto a single die.
Delivering a maximum 140W output and 7A current rating, it efficiently powers heavy-duty devices like laptops, tablets, and smartphones. Through proprietary dual-chip coordination, it enables seamless multi-port smart power sharing (such as 2 USB-C and 1 USB-A) sans an external MCU, sharply cutting down both board space and BOM cost.
Engineered for supreme versatility, the SC9712B supports adjustable 80kHz–600kHz switching frequencies, with Type-C compliance spanning USB PD 3.1 and PPS for E-Marker cables, alongside broad backward compatibility for USB-A/DPDM across BC1.2, AFC, FCP, SCP, and UFCS standards. System intelligence is managed via plug-in detection and zero-load sleep modes for optimized multi-device sharing. Safety layers include external NTC tracking, thermal shutdown, and over-current/short-circuit protection.
The solution has already secured commercial wins in tier-1 multi-port GaN chargers, including the vivo 120W 2 USB-C and 1 USB-A, Baseus 140W 3 USB-C and 1 USB-A, and Xiaomi 67W desktop charging strip.
The SC9712B shatters conventional multi-port limitations by eliminating host MCU dependency, striking an ideal balance between high power delivery, universal protocol matching, and smart energy allocation in a tiny footprint. It streamlines design cycles and slashes peripheral overhead while setting new performance standards. As charging ecosystems shift toward leaner, controller-free, and universal footprints, the SC9712B stands ready to drive the next wave of high-wattage multi-port innovation.
Related Articles：
1. Southchip SC8723: A High-Integration Solution for Compact Buck-Boost Power
2. iCM Chip Joins Tesla Supply Chain: A Milestone for China’s Semiconductor Industry
3. RUNXIN's GaN Chips Enter Philips Supply Chain
