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.
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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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Featured Videos
ST's Wireless battery charging demo
All tools & software
All resources
| Resource title | Latest update |
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Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 31 Aug 2016 |
31 Aug 2016
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Application Notes for related Tools & Software (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 20 Sep 2018 |
20 Sep 2018
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| 13 Sep 2018 |
13 Sep 2018
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Flyers (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 28 Jun 2018 |
28 Jun 2018
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Brochures (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 29 Jul 2020 |
29 Jul 2020
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| 23 Nov 2020 |
23 Nov 2020
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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
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STWBC-WA |
Active
|
VFQFPN 32 5x5x1.0 mm | Industrial | Ecopack2 | |
| STWBC-WATR |
Active
|
VFQFPN 32 5x5x1.0 mm | Industrial | 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 | Country of Origin | Output Power (W) (typ) | Budgetary Price (US$)*/Qty | More info | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||||||
| STWBC-WATR | No availability of distributors reported, please contact our sales office |
Active
|
3A991A2 | NEC | Tape And Reel | VFQFPN 32 5x5x1.0 mm | -40 | 105 | Industrial | CHINA | 2.5 | 2.5125 / 1k | |||
| STWBC-WA | 3 distributors |
Active
|
3A991A2 | NEC | Tray | VFQFPN 32 5x5x1.0 mm | -40 | 105 | Industrial | CHINA | 2.5 | 2.5125 / 1k | |||
Marketing Status
ActiveECCN (US)
3A991A2Budgetary Price (US$)*/Qty
2.5125 / 1kMarketing Status
ActiveECCN (US)
3A991A2Budgetary Price (US$)*/Qty
2.5125 / 1k(*) 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
