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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) | Country of Origin | Temperature (°C) | Output Power (W) (typ) | More info | Approximate Price (US$)* / Qty | Order from ST | Order from Distributors | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| STWBC-MCTR | Active | VFQFPN 32 5x5x1.0 | Industrial | 3A991A2 | PHILIPPINES | -40 | 105 | 15 | 6.01 / 1k | No availability of distributors reported, please contact our sales office | ||
| STWBC-MC | Active | VFQFPN 32 5x5x1.0 | Industrial | 3A991A2 | PHILIPPINES | -40 | 105 | 15 | 3.225 / 1k | Get sample | Check Availability | |
STWBC-MCTR
Marketing Status
ActivePackage
VFQFPN 32 5x5x1.0Approximate Price (US$)* / Qty
6.01 / 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
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Picture Part number Manufacturer Description 
STEVAL-ISB047V1 ST Qi certified 3-coil 15 W wireless charger TX evaluation kit based on STWBC-MC Part NumberQi certified 3-coil 15 W wireless charger TX evaluation kit based on STWBC-MC
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| 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 |
(**) 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.
