SC8551A CHARGING IC

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1. Product Title

Southchip SC8551A Fast Charging IC (56-Ball BGA / WLCSP) – 8A Charge Pump Power IC for Honor, Huawei, Xiaomi & OPPO Smartphones

2. Short Description 

Southchip SC8551A (56-Ball BGA / WLCSP) high-efficiency 8A switched-capacitor 2:1 fast-charging IC (charge pump). Compatible with 95+ smartphone motherboards including Honor 50, Honor 50 SE, Honor 80 SE, Honor Magic 3, Honor X30, Honor X9 5G, Huawei Nova 8/9, Xiaomi Mi 10 Series, and OPPO Reno7 Series. Ideal for fixing slow charging, no fast-charge detection, charging IC short circuits, and overheating issues.

3. Long Description 

Product Overview

The Southchip SC8551A is an advanced 8A switched-capacitor direct fast-charging IC (2:1 charge pump) designed for modern high-wattage smartphone motherboards. Built with a switched-capacitor voltage-divider architecture and integrated power FETs, it halves the input voltage while doubling the current delivered to the battery. This design achieves up to 97% peak conversion efficiency (96.2% typical at 8A), drastically reducing power loss and heat dissipation on the logic board during fast-charging cycles.

Packaged in a compact 56-ball WLCSP / BGA (7 × 8 solder ball matrix) footprint, this replacement chip is engineered for professional mobile repair technicians performing board-level micro-soldering and charging circuit restoration.

Key Features & Advantages

• Dual-Mode Fast Charging: Supports 2:1 charge-pump fast-charging mode (up to 8A / 40W typical) as well as 1:1 low-voltage direct-charging bypass mode (up to 6A).
• Ultra-High Efficiency: Delivers up to 97% peak efficiency, minimizing thermal throttling and logic board heat buildup during heavy charging loads.
• 26-Layer Hardware Protection: Integrates comprehensive system-level and charge-pump safeguards including input/output over-voltage protection (VAC_OVP, VBUS_OVP, VOUT_OVP, VBAT_OVP), over/under-current protection (IBUS_OCP, IBUS_UCP, IBAT_OCP), flying capacitor (CFLY) & driver (CDRV) short/open detection, and thermal shutdown (TSHUT).
• Built-In 7-Channel 12-Bit ADC: Continuously monitors VAC, VBUS, IBUS, VOUT, VBAT, IBAT, and die temperature (TDIE) for real-time charging safety.

Technical Specifications

Compatible Smartphone Models

The SC8551A is used across 95+ smartphone models, including:

• Honor: Honor 50, Honor 50 SE, Honor 80 SE, Honor Magic 3, Honor X30, Honor X9 5G
• Huawei: Huawei Nova 8, Huawei Nova 9
• Xiaomi / Redmi: Xiaomi Mi 10, Xiaomi Mi 10S, Redmi 10A, Redmi 10C, and compatible Xiaomi/Redmi fast-charging models
• OPPO / Realme: OPPO Reno7, OPPO Reno7 Pro, and compatible fast-charging motherboards

(Note: Smartphone hardware revisions vary by region. Always confirm the physical IC marking SC8551A on your motherboard or schematic diagram before ordering.)

Common Faults Fixed by Replacing This IC

• Fast charging / SuperCharge / Turbo Charge not working (stuck on normal slow charging)
• Phone overheating around the charging IC area when connected to a charger
• Short circuit or abnormal current draw on the VBUS or PMID charging line
• Intermittent charging connection or failure to negotiate high-wattage charging protocols

Technician Installation & Handling Notes

• Professional Rework Required: Requires a hot-air SMD rework station, BGA soldering flux, and precision ESD-safe tweezers.
• Pin 1 Alignment: Align the laser-etched circular Pin A1 orientation dot on the corner of the IC with the motherboard silkscreen indicator prior to reflowing.
• Pre-Installation Check: Check surrounding flying capacitors (CFLY) and VBUS lines for short circuits before powering on the repaired logic board.
• Warranty Policy: ICs are precision semiconductor components; no warranty or replacement applies once soldered or heated. Inspect IC markings and solder balls under a microscope prior to installation.

Package Includes

• 1 × Southchip SC8551A 56-Ball BGA Fast Charging IC (Pre-balled, Ready to Solder)

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