Qi based, 1 W optimized wireless power receiver

The STWLC04 is an integrated wireless power receiver suitable for wearable applications. The STWLC04 is focused on 1-watt power transfer based on Qi protocol with digital control and precise analog control loops ensuring stable operation. Together with the STWBC-WA transmitter, the STWLC04 enables a complete wireless power transmission. I2C interface allows many parameters to be customized in the device and this configuration can be stored in the embedded NVM.

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 1.0 wireless 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)


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

Selection Guides
Description Version Size
Linear and Switching Voltage Regulators Selection Guide 383 KB
Description Version Size
Brochure Power management guide 05.2016 4 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STWLC04JR Chip Scale Package 0.4mm pitch Tape And Reel Active 1.7 1000 NEC EAR99 - MORE INFO

(*) 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 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STWLC04JR ActiveChip Scale Package 0.4mm pitchIndustrialEcopack2

(**) 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.