Digital controller for wireless battery charger transmitters (WBC) in 15 W medium power applications

The STWBC-EP is the digital controller for the wireless battery charger (WBC) transmitters (TX) from STMicroelectronics optimized for Extended Power Profile (EPP) Wireless Power Consortium (WPC) 1.2 certified applications up to 15 W.

It offers the most flexible and efficient solution for controlling the power transfer to a receiver (RX) in WBC-enabled applications such as smartphones, tablets and other battery-powered devices that use the electromagnetic induction for recharging.

The TX is responsible for controlling the transmitting coil and generating the correct amount of power requested by the RX. The RX continuously provides the transmitter with the correct power level requested, by modulating the transmitter carrier through the controlled resistive or capacitive load. Generating the correct amount of power ensures the highest level of end-to-end efficiency due to reduced energy losses. It also helps maintaining a lower operational temperature.

The TX can adapt to the amount of energy transferred by the coil by modulating the frequency, duty cycle or amplitude of the PWM voltage on the transmitting coil.

The STWBC-EP is capable of bidirectional communication with the RX as specified by the WPC 1.2 protocol.

Key Features

  • Digital controller for wireless battery charger transmitter
  • 15 W single coil inductive transmitters optimized for:
    • Cell phones and smartphones
    • Tablets and phablets
    • Charging accessories
  • Support for Wireless Power Consortium (WPC) 1.2 EPP 15 W certified applications
    • Backward compatible with 5 W WPC 1.1 applications
  • Support for half bridge topology with DC/DC
  • VIN range: 3 V to 5.5 V
    • Supports USB Vin
  • Active presence detector
  • Foreign object detection
  • Q-factor measurement
  • Parametric customization via GUI
  • Turnkey firmware solution
  • Peripherals
    • 10-bit ADC
    • UART interface
    • I2 C master fast/slow speed rate
    • GPIOs
  • Memory
    • Flash and EEPROM with read-while-write (RWW) and Error Correction Code (ECC)
    • Program memory: 32-Kbyte Flash; data retention: 20 years at 55 °C after 1000 cycles at 55 °C
    • Data memory: 1 Kbyte true data EEPROM; data retention: 20 years at 55 °C after 1000 cycles at 85 °C
    • RAM: 6 Kbytes
  • Transmitter reference design:
    • WPC Qi 1.2.3 certified
    • MP-A10 single coil 15 W topology
    • Evaluation board order code: STEVAL-ISB044V1
    • 2-layer PCBs
    • Active object detection
    • Graphical User Interface for application monitoring
  • Operating temperature: -40 °C up to 105 °C
  • Package: VFQFPN32 - 5 x 5mm

Resources

Technical Documentation

Product Specifications
Description Version Size
Digital controller for wireless battery chargers transmitters for Qi 15 W applications 1.0 710 KB

Publications and Collaterals

Flyers
Description Version Size
STWBC-EP Extended Wireless Power 12.1017 817 KB
Brochures
Description Version Size
Brochure Power management guide 09.2017 3 MB

Tools and Software

Embedded Software
Evaluation Tool 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
STWBC-EP Digital controller for wireless battery charger transmitters (WBC) in 15 W medium power applications -40 105 VFQFPN 32 5x5x1.0 Industrial - 15 - MORE INFO No availability reported, please contact our Sales office
STWBC-EPTR Digital controller for wireless battery charger transmitters (WBC) in 15 W medium power applications -40 105 VFQFPN 32 5x5x1.0 Industrial - 15 - MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY
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(*) 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**
STWBC-EP Digital controller for wireless battery charger transmitters (WBC) in 15 W medium power applications-40.0105.0VFQFPN 32 5x5x1.0Industrial - 15.0 - 0 0
STWBC-EPTR Digital controller for wireless battery charger transmitters (WBC) in 15 W medium power applications-40.0105.0VFQFPN 32 5x5x1.0Industrial - 15.0 - 0 0
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(**) 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.

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