GY5502 is a highly integrated power management IC designed specifically for wearables and TWS earbuds. It offers a compact and efficient solution combining charging control, power path management, and power line communication into a single chip. The device supports NVDC architecture, configurable charging current and voltage, bidirectional single-line communication, battery gauge, 12-bit SAR ADC, and an I²C interface.
Its compact 2.0mm x 2.0mm CSP package makes it ideal for space-constrained applications.

Key Features

• VBAT standby current: 3μA

• Ship-mode standby current: 400nA

• Input voltage withstand: VIN up to 16V

• Input over-voltage protection (OVP): 6.0V / 6.8V

• Constant charging current: 2mA to 500mA, register configurable

• Charging voltage (VFLOAT):

  • 4.00V–4.10V (step: 25mV), accuracy ±0.5%

  • 4.10V–4.50V (step: 12.5mV), accuracy ±0.5%

• Termination current (ITC/ITERM): 1mA to 40mA, configurable

• DCDC charging supported, efficiency up to 93%

• Bidirectional communication up to 3Mbps

  • Auto/manual direction switching

  • Supports voltage mode Rx/Tx and current mode Tx

• Earbuds case-in/out detection integrated

• Watchdog timer: 40s / 80s / 160s

• I²C interface: up to 400kbps

• 12-bit SAR ADC: VIN, VBAT, NTC, ICC, IVIN monitoring

• Integrated battery gauge (±5% accuracy)

• CSP package: 2.0mm × 2.0mm

Applications

• True Wireless Stereo (TWS) earbuds

• Smartwatches and fitness trackers

• IoT wearable devices

• Smart rings and compact healthcare devices

Downloads

• 📄 GY5502 Datasheet (PDF)

• 📘 Application Notes

• 📩 Request Evaluation Samples