Qi based, 1 W optimized wireless power receiver

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)

Resources

Technical Documentation

Product Specifications
Description Version Size
DS11760 DS11760: Qi based 1 W wireless power receiver 2.0 2 MB
DB3007 DB3007: Qi based, 1 W optimized wireless power receiver 2.0 1 MB

Publications and Collaterals

Flyers
Description Version Size
Wireless power kit for IoT devices 07.2017 729 KB
Brochures
Description Version Size
Brochure Power management guide 09.2017 3 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
Support & Community


Sample & Buy

Part Number General Description Operating Temperature (°C) (min) Operating Temperature (°C) (max) Package Grade Input Voltage (V) (max) Output Power (W) (typ) Voltage regulator Vout (V) More info Order from ST Order from Distributors
STWLC04JR Qi based, 1 W optimized wireless power receiver -40 85 Chip Scale Package 0.4mm pitch Industrial - 1 - MORE INFO DISTRIBUTOR AVAILABILITY
test

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number General Description Operating Temperature Operating Temperature Package Grade Input Voltage Output Power Voltage regulator Vout Material Declaration**
STWLC04JR Qi based, 1 W optimized wireless power receiver-40.085.0Chip Scale Package 0.4mm pitchIndustrial - 1.0 -
test

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

×