Digital controller for wireless battery chargers transmitters for Qi multicoil applications

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  • The STWBC-MC is the digital controller for the wireless battery charger (WBC) transmitters (TX) from STMicroelectronics optimized for the extended power profile (EPP) Wireless Power Consortium (WPC) multi-coil 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-MC 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
    • Multi-coil inductive transmitters optimized for:
      • Cell phones and smartphones
      • Tablets and phablets
      • Charging accessories
    • Support for Wireless Power Consortium (WPC) 1.2 EPP applications
      • Backward compatible with WPC BPP and 1.1 5W 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
      • I2C master fast/slow speed rate
      • GPIOs
    • Memory
      • Flash and EEPROM with read-while-write (RWW) and Error Correction Code (ECC)
      • Program memory: 32 Kbytes 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:
      • Multi-coil EPP topology
      • 2-layer PCBs
      • Active object detection
      • Graphical user interface for application monitoring
    • Operating temperature: -40 °C up to 105 °C
    • Package: VFQFPN32 5 x 5 mm

Sample & Buy

Part Number
Marketing Status
Package
Grade
ECCN (US)
Budgetary Price (US$)*
Quantity
Country of Origin
Operating Temperature (°C) (max)
More info
Order from Distributors
Order from ST
STWBC-MCTR
Active
VFQFPN 32 5x5x1.0 Industrial 3A991A2 3.225 1000 PHILIPPINES 105
MORE INFO

Operating Temperature (°C) (min):

-40

Output Power (W) (typ):

15

No availability of distributors reported, please contact our sales office
STWBC-MC
Active
VFQFPN 32 5x5x1.0 Industrial 3A991A2 3.225 1000 PHILIPPINES 105
MORE INFO

Operating Temperature (°C) (min):

-40

Output Power (W) (typ):

15

Check Availability

Distributor availability ofSTWBC-MC

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 456 1 Order Now
MOUSER WORLDWIDE 427 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

456

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

427

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-17

Get sample

STWBC-MCTR

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0

Unit Price (US$)

3.225*

Grade

Industrial

ECCN (US)

3A991A2

Unit Price (US$)

3.225

Quantity

1000

Country of Origin

PHILIPPINES

(max)

105

Operating Temperature (°C)

(min)

-40

Output Power (W) (typ)

15

STWBC-MC

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0

Unit Price (US$)

3.225*

Distributor availability ofSTWBC-MC

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 456 1 Order Now
MOUSER WORLDWIDE 427 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

456

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

427

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-17

Grade

Industrial

ECCN (US)

3A991A2

Unit Price (US$)

3.225

Quantity

1000

Country of Origin

PHILIPPINES

(max)

105

Operating Temperature (°C)

(min)

-40

Output Power (W) (typ)

15

(*) 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

Education

This product is labeled Sustainable Technology.

Evaluation Tools

    • Part Number

      Qi certified 3-coil 15 W wireless charger TX evaluation kit based on STWBC-MC

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS12373
      Digital controller for wireless battery chargers transmitters for Qi multicoil applications
      3.0
      890.78 KB
      PDF
      DS12373

      Digital controller for wireless battery chargers transmitters for Qi multicoil applications

Publications and Collaterals

    • Description Version Size Action
      Power Management Guide 06.2019
      5.5 MB
      PDF
      Products and solutions for Wearable devices 1.0
      2 MB
      PDF

      Power Management Guide

      Products and solutions for Wearable devices

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STWBC-MC
Active
VFQFPN 32 5x5x1.0 Industrial Ecopack2
STWBC-MCTR
Active
VFQFPN 32 5x5x1.0 Industrial Ecopack2

STWBC-MC

Package:

VFQFPN 32 5x5x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STWBC-MCTR

Package:

VFQFPN 32 5x5x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.