STWBC2

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Digital controller for wireless battery charger transmitters

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Product overview

Description

The STWBC2 is a digital controller specifically dedicated to design Qi-certified Wireless Power TX applications. The STWBC2 is an SiP including an STM32™ microcontroller and an application-specific front-end die. Specifically, the STM32™ microcontroller embedded into the STWBC2 is the STM32G071.
The STWBC2 is capable of driving the DC-DC stage and the half- or full-bridge inverter stage of a generic Qi wireless battery charging TX. It generates and controls the relevant PWM signals by means of a PWM machine capable of 1.47 ns resolution. In order to achieve that, the front-end die includes a 40 MHz PLL and a 17-step DLL.
The STWBC2 front-end is capable of working from any DC voltage in the range of
5 V to 24 V and embeds:
The front-end die also includes specific registers and an SPI interface with the STM32, in combination with an output mux for analog signals to the STM32 ADC, and GPIOs for digital signals to the STM32 core.
The STM32 microcontroller embeds an ARM Cortex™-M0+ CPU with up to 128k Flash memory and up to 32k of SRAM with parity check, with a clock frequency up to 64 MHz. It also embeds a 12-bit, 0.5 μs ADC and provides UART, I2C, SPI and GPIOs.
The STM32G071 embedded in the STWBC2 also provides two 12-bit DACs and USB-PD controller.
  • All features

    • Digital controller for Qi certified wireless power transmitters
      • Compliant with WPC Qi 1.2.4 and 1.3
      • Power Class 0 BPP (5 W) and EPP (15 W)
      • Proprietary extension from smartphone manufacturers
    • SiP with uC and front-end device:
      • ARM 32-bit Cortex™-M0+ CPU, frequency up to 64 MHz
      • 3x half-bridge drivers
      • Embedded 3.6 V / 5 V 500 mA DC/DC
      • 3.3 V 150 mA and 1.8 V 50 mA LDOs
      • 6 V to 9 V up to 100 mA voltage doubler
      • Qi FSK programmable modulator
      • Integrated current, voltage and phase demodulators
      • Integrated current and voltage sensors.
    • Support for half- and full-bridge topologies with input DC/DC
      • Single and multi-coil topologies
      • Support for limited power sources such as 5 V 500 mA USB
    • VIN operative range: 4.1 V to 24 V
    • USB physical interfaces
      • USB power delivery
    • Communication interfaces
      • UART
      • SPI (up to 28 Mbit/s)
      • I2C (up to 1 Mbit/s)
      • Up to 8x GPIOs
    • Peripherals
      • 40 MHz PLL
      • 17-step DLL
      • 1.47 ns resolution PWM generator
      • 8-channel 12-bit 0.5us ADC
      • Low-side differential current sensor
      • Q-Factor driver
    • Memory
      • 128 Kbytes of Flash memory with ECC
      • 32 Kbytes of SRAM with HW parity check
    • Clock management
      • 4 to 48 MHz crystal oscillator
    • Development support: serial wire debug (SWD)
    • Operating temperature: -40°C up to 125°C.
    • Package: VFQFPN68L 8x8 mm pitch 0.4
    • 96-bit unique ID

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STWBC2
Active
VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA Industrial Ecopack2
STWBC2TR
Active
VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA Industrial Ecopack2

STWBC2

Package:

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STWBC2TR

Package:

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

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
STWBC2TR No availability of distributors reported, please contact our sales office
Active
3A991A2 NEC Tape And Reel VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA -40 105 Industrial
MORE INFO

Unit Price (US$):

-

Country of Origin:

THAILAND

Output Power (W) (typ):

50

STWBC2 No availability of distributors reported, please contact our sales office
Active
3A991A2 NEC Tray VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA -40 105 Industrial
MORE INFO

Unit Price (US$):

-

Country of Origin:

THAILAND

Output Power (W) (typ):

50

STWBC2TR

Marketing Status

Active

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

Country of Origin

THAILAND

Output Power (W) (typ)

50

STWBC2

Marketing Status

Active

ECCN (US)

3A991A2

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tray

Package

VFQFPN 8X8X1.0 68LPITCH0.4 ROUTA

Operating Temperature (°C)

(min)

-40

(max)

105

Grade

Industrial

Budgetary Price (US$)* / Qty

Country of Origin

THAILAND

Output Power (W) (typ)

50

(*) 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