STWBC-EP

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

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  • 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
      • I2C 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

Development Tools

Embedded Software

    • Part Number

      Firmware for the STEVAL-ISB044V1 wireless power transmitter evaluation board based on STBWC-EP

      STWBC firmware downloader tool

      Graphical user interface for wireless power transmitter evaluation boards based on the STWBC chip family

Evaluation Tools

    • Part Number

      Qi MP-A15 15W wireless charger TX evaluation kit based on STWBC-EP

      Qi MP-A10 15 W wireless charger TX evaluation kit based on STWBC-EP

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS12197
      Digital controller for wireless battery chargers transmitters for Qi 15 W applications
      1.0
      710.13 KB
      PDF
      DS12197

      Digital controller for wireless battery chargers transmitters for Qi 15 W applications

    • Description Version Size Action
      AN5535
      Coil selection tool guide for STWLC68GUI
      1.0
      1.26 MB
      PDF
      AN5535

      Coil selection tool guide for STWLC68GUI

Publications and Collaterals

    • Description Version Size Action
      STWBC-EP Extended Wireless Power 12.2017
      817.57 KB
      PDF

      STWBC-EP Extended Wireless Power

    • Description Version Size Action
      Power Management Guide 07.2020
      7.12 MB
      PDF
      Products and solutions for Wearable devices 1.0
      2 MB
      PDF

      Power Management Guide

      Products and solutions for Wearable devices

Quality and Reliability

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

STWBC-EP

Package:

VFQFPN 32 5x5x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STWBC-EPTR

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.

Sample & Buy

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min
max
STWBC-EP Available at 2 distributors

Distributor availability ofSTWBC-EP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 343 1 Order Now
MOUSER WORLDWIDE 2220 1 Order Now

Distributor reported inventory date: 2020-09-20

Distributor Name

DIGIKEY

Stock

343

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2220

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-09-20

Sample & Buy Buy now
Active
3A991A2 NEC Tray VFQFPN 32 5x5x1.0 -40 105 Industrial 2.875 / 1k
MORE INFO

Unit Price (US$):

2.875

Country of Origin:

CHINA

Output Power (W) (typ):

15

STWBC-EPTR Available at 3 distributors

Distributor availability ofSTWBC-EPTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 185 1 Order Now
MOUSER WORLDWIDE 45 1 Order Now
Farnell Element14 EUROPE 2880 1 Order Now

Distributor reported inventory date: 2020-09-20

Distributor Name

DIGIKEY

Stock

185

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

45

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2880

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-20

Buy now
Active
3A991A2 NEC Tape And Reel VFQFPN 32 5x5x1.0 -40 105 Industrial 2.875 / 1k
MORE INFO

Unit Price (US$):

2.875

Country of Origin:

CHINA

Output Power (W) (typ):

15

STWBC-EP

Marketing Status

Active

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

2.875 / 1k

Distributor availability ofSTWBC-EP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 343 1 Order Now
MOUSER WORLDWIDE 2220 1 Order Now

Distributor reported inventory date: 2020-09-20

Distributor Name

DIGIKEY

Stock

343

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2220

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-09-20

ECCN (EU)

NEC

Packing Type

Tray

Package

VFQFPN 32 5x5x1.0

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

2.875 / 1k

Country of Origin

CHINA

Output Power (W) (typ)

15

STWBC-EPTR

Marketing Status

Active

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

2.875 / 1k

Distributor availability ofSTWBC-EPTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 185 1 Order Now
MOUSER WORLDWIDE 45 1 Order Now
Farnell Element14 EUROPE 2880 1 Order Now

Distributor reported inventory date: 2020-09-20

Distributor Name

DIGIKEY

Stock

185

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

45

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2880

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 32 5x5x1.0

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

2.875 / 1k

Country of Origin

CHINA

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