STWBC-WA

NRND
Education

Digital controller for wireless battery charger transmitters for wearable and smart watches applications

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Product overview

Description

The STWBC-WA is STMicroelectronics’ wireless battery charger transmitter application optimized for wearable usage. Thanks to its 5 V native supply, the STWBC-WA device is ideal to operate with USB power supplies.
Wireless battery charging systems replace the traditional power supply cable by means of electromagnetic induction between a transmitting pad or dongle (TX) and a battery-powered unit (RX), such as a smartwatch or sports gear.
The power transmitter unit is responsible for controlling the transmitting coil and generating the correct amount of power requested by the receiver unit. The receiver unit continuously provides the transmitter the correct power level requested, by modulating the transmitter carrier through controlled resistive or capacitive insertion. Generating the correct amount of power guarantees the highest level of end-to-end efficiency due to reduced energy waste. It also helps to maintain a lower operational temperature.
The digital wireless battery transmitter can adapt to the amount of energy transferred by the coil by modulating the frequency, duty cycles or coil input voltage.
  • All features

    • Digital controller for wireless battery charger transmitters
    • Optimized for < 3 W applications
      • Smartwatches and healthcare
      • Internet of Things (IoT) battery-powered smart devices
      • Remote controllers
    • Cost effective half-bridge topology with integrated drivers
    • Optional full-bridge configuration for 3 W applications
    • VIN range: 3 V to 5.5 V
      • Supports USB VIN
    • Active presence detector
    • Parametric customization via graphical interface
    • 2 firmware options:
      • Turnkey solution for quick design
      • APIs available for application customization
    • Peripherals available via APIs
      • ADC, with 10-bit precision
      • UART
      • 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: 15 years at 85 °C after 10 kcycles at 25 °C
      • Data memory: 1 Kbyte true data EEPROM; data retention: 15 years at 85 °C after 100 kcycles at 85 °C
      • RAM: 6 Kbytes
    • Transmitter reference design:
      • Evaluation board order code: STEVAL-ISB038V1T
      • 2-layer PCBs
      • Active object detection
      • Graphical user interface for application monitoring
      • Interoperable with receiver: STEVAL-ISB038V1R
    • Operating temperature
      • -40 °C up to 105 °C
    • Package
      • VFQFPN32

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All tools & software

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      Integrated Development Environment

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      IAR Embedded Workbench for STM8

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      Integrated Development Environment

      IAR Embedded Workbench for STM8 - Functional Safety

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      IAR Embedded Workbench for STM8 - Functional Safety

      Description:

      Integrated Development Environment
    • Part number
      Status
      Description
      Type
      Supplier

      STSW-ISB045FW

      Active

      Firmware for the STEVAL-ISB045V1 wireless charger transmitter evaluation kit based on STWBC-WA

      Evaluation Tool Software ST
      STSW-ISB045FW

      Description:

      Firmware for the STEVAL-ISB045V1 wireless charger transmitter evaluation kit based on STWBC-WA

      STSW-STWBCFWDT

      Active

      STWBC firmware downloader tool

      Evaluation Tool Software ST
      STSW-STWBCFWDT

      Description:

      STWBC firmware downloader tool

      STSW-STWBCGUI

      Active

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

      Evaluation Tool Software ST
      STSW-STWBCGUI

      Description:

      Graphical user interface for wireless power transmitter evaluation boards based on the STWBC chip family
    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-ISB045V1

      Active

      2.5 W wireless charger transmitter evaluation kit

      PSU and Converter Solution Eval Boards ST
      STEVAL-ISB045V1

      Description:

      2.5 W wireless charger transmitter evaluation kit

EDA Symbols, Footprints and 3D Models

STMicroelectronics - STWBC-WA

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STWBC-WA
NRND
VFQFPN 32 5x5x1.0 mm Industrial Ecopack2
STWBC-WATR
NRND
VFQFPN 32 5x5x1.0 mm Industrial Ecopack2

STWBC-WA

Package:

VFQFPN 32 5x5x1.0 mm

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

VFQFPN 32 5x5x1.0 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STWBC-WATR

Package:

VFQFPN 32 5x5x1.0 mm

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

VFQFPN 32 5x5x1.0 mm

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

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Grade
Budgetary Price (US$)*/Qty
More info
min
max
STWBC-WATR No availability of distributors reported, please contact our sales office
NRND
3A991A2 NEC Tape And Reel VFQFPN 32 5x5x1.0 mm -40 105 Industrial 3.04 / 1k
MORE INFO

Unit Price (US$):

3.04

Country of Origin:

CHINA

Output Power (W) (typ):

2.5

STWBC-WA Available at 2 distributors

Distributor availability ofSTWBC-WA

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 21 1 Buy from Distributor
ANGLIA Live EUROPE 50 1 Buy from Distributor

Distributor reported inventory date: 2021-11-22

Distributor Name

RS COMPONENTS

Stock

21

Min.Order

1

ANGLIA Live

Stock

50

Min.Order

1

Distributor reported inventory date: 2021-11-22

NRND
3A991A2 NEC Tray VFQFPN 32 5x5x1.0 mm -40 105 Industrial 3.04 / 1k
MORE INFO

Unit Price (US$):

3.04

Country of Origin:

CHINA

Output Power (W) (typ):

2.5

STWBC-WATR

Marketing Status

NRND

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

3.04 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 32 5x5x1.0 mm

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

3.04 / 1k

Country of Origin

CHINA

Output Power (W) (typ)

2.5

STWBC-WA

Marketing Status

NRND

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

3.04 / 1k

Distributor availability ofSTWBC-WA

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 21 1 Buy from Distributor
ANGLIA Live EUROPE 50 1 Buy from Distributor

Distributor reported inventory date: 2021-11-22

Distributor Name

RS COMPONENTS

Stock

21

Min.Order

1

ANGLIA Live

Stock

50

Min.Order

1

Distributor reported inventory date: 2021-11-22

ECCN (EU)

NEC

Packing Type

Tray

Package

VFQFPN 32 5x5x1.0 mm

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

3.04 / 1k

Country of Origin

CHINA

Output Power (W) (typ)

2.5

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