MU106X01-5 IC
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Product Details
Product Details:
- Part Number: MU106X01-5 (Laser Engraved Chip Marking: S2MU106X01 / S2MU106)
- Manufacturer: Samsung Electronics / Samsung Semiconductor
- Function: High-Efficiency Switch-Mode Fast Battery Charger, USB Type-C CC Logic & Sub-PMIC
- Key Internal Subsystems:
* High-Current Switching Buck Battery Charger with NVDC System Power Path Management
* USB Type-C Port Controller & Fast Charging Negotiation (Samsung Adaptive Fast Charging / AFC & USB-PD)
* System Voltage Regulators (VCHG, VSYS, VDD_IO, and Auxiliary LDOs)
* Battery Temperature Monitoring (NTC thermistor ADC sensing line)
* Reverse OTG Boost Converter (5V output for USB flash drives and accessories)
* Over-Voltage (OVP up to 14V), Over-Current, and Thermal Shutdown Protections
- Package Type: Fine-Pitch WLCSP / BGA
- Stencil Compatibility: Amaoe SAM:10 / Universal Samsung PMIC Stencil (0.12mm)
- Recommended Solder Paste: 183°C Leaded Solder Paste
Usage:
- Power & Charging Management: Manages current flow coming from the USB Type-C connector to charge the battery, while simultaneously powering system rails and coordinating fast charge protocol negotiation.
- Target Devices & Compatible Models:
* Samsung Galaxy A-Series:
- Galaxy A10 (SM-A105F)
- Galaxy A20 (SM-A205F)
- Galaxy A30 (SM-A305F)
- Galaxy A30s (SM-A307FN)
- Galaxy A40 (SM-A405F)
- Galaxy A50 (SM-A505F / A505FN)
- Galaxy A70 (SM-A705F)
- Galaxy A31 (SM-A315F)
- Galaxy A71 (SM-A715F)
- Galaxy M51 (SM-M515F)
* Samsung Galaxy S-Series:
- Galaxy S10 (SM-G973F)
- Galaxy S10+ (SM-G975F)
- Galaxy S10e (SM-G970F)
- Galaxy S10 5G (SM-G977B)
- Common Fault Symptoms & Motherboard Diagnostics:
* Zero Current / No Charging (0.00A on USB Tester):
- Charger is plugged in, but ammeter registers 0.00A or stops at 0.05A. The charging logic or input OVP stage inside S2MU106X01 is open or blown.
* Fake Charging (Percentage Stuck or Drops):
- The lightning bolt and battery charging ring animation appear on screen, but the battery percentage does not rise even after hours, or drops during use.
* Temperature Error Warning (Yellow Triangle):
- Phone displays "Charging paused: Battery temperature too high / low" immediately upon connecting the charger, caused by damage to the internal NTC sensing circuit inside S2MU106X01.
* Dead Phone (No Power / DC Supply Hangs at 0.02A–0.05A):
- Phone completely dead (very common in Samsung A30 and A50). Pressing the power key registers a low static freeze on the DC supply because the VSYS / VPH_PWR rail generated by S2MU106X01 is missing or collapsed.
* Excessive Board Heating Near Charging Area:
- S2MU106X01 gets burning hot to touch immediately after plugging in the USB cable or battery, caused by an internal short circuit across the main switching buck coil or input capacitors.
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