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SY8803 Sample Application
General Description

SY8803 is a power and communication chip. The device is integrated with a charger and a boost inside. It is utilizing two signal lines (ground and power line) for data transmission. The device is also equipped with a standard I2C interface for data exchange with MCU, an interrupt output and an EN PIN. Load in detect and load current detect are also available.
SY8803 is perfectly suited for True Wireless headset application thanks for these features. It can realize a smart charge cradle with few instruments outside.
SY8803 supports QFN16 4mmX4mm package.

Features

Low quiescent current: 5uA

Charge current is set by external resistor

Charge current up to 1A

Input voltage withstand up to 28V

Switch charger with high efficiency up to

93%@0.5A

Switch frequency for charger: 1MHz

Dynamic Power-Path Management for charger

Support charging the charge cradle and earbuds at the same time

Dynamic Temperature Management for charger

Auto charge end and recharge

Terminated charge voltage: 4.2V; 4.35V is

available; The accuracy is 1%

Input OVP protection and NTC protection is

available

Boost output is 5V with High efficiency up to

93%@0.1A

Switch frequency for boost: 1MHz

Support load in detect

Support shut down current detect, shut down current is set by external resistor

Support temperature management for boost

Over-current protection (OCP), over voltage

protection (OVP), over temperature protection (OTP) and short circuit protection (SCP) are integrated for boost

Standard I2C interface and Enable PIN

Conform to the latest standard of CN48790 of IEC62368

Typical Application Circuit Diagram
Applications

Smart charge cradle