The STWLC04 is an integrated wireless power receiver suitable for wearable applications. The device is designed for 1-watt power transfer based on the Qi protocol, with digital control and precise analog control loops ensuring stable operation. The I2C interface allows a high degree of customization and settings can be stored in the embedded non-volatile memory.
●The STWLC04 can deliver the output power in two modes: as a power supply with configured output voltage or as a simple CC/CV battery charger with configurable charging current, charging voltage and termination current. The STWLC04 can detect the external (wired) power supply connection and drive an external power switch.
●Key Features
● 1 W output power
● Qi 1.1 wireless standard communication protocol based
● Integrated high efficiency synchronous rectifier
● 800 kHz programmable step-down converter with input current and input voltage regulation loop
● Step-down converter efficiency up to 90%
● Simplified Li-Ion/Polymer charger function
● 32-bit, 16 MHz embedded microcontroller with 16 kB ROM and 2 kB RAM memory
● 2 kB NVM for customization
● Integrated driver for external supply switch
● Precise voltage and current measurements for received power calculation
● I2 C interface
● Configurable GPIO output
● Rx coil NTC protection
● Thermal protection
● Low power dissipative rectifier overvoltage clamp
● Flip Chip 77 bumps (3.12x4.73 mm)
