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Overview
| Topology | Wireless Power Transfer |
| Input voltage | 3-5.5 V |
| Output 1 | 5 V / 1 A |
| IC revision | V1 |
Description
The STWBC digital controller for wireless battery charger (WBC) transmitters from STMicroelectronics offers the most flexible and efficient solution for controlling power transfer from a WBC transmitter (TX) to a receiver (RX) in WBC-enabled phones, wearables, and other battery-powered devices that use electromagnetic induction for re-charge. As a member of the Qi Wireless Power Consortium and the PMA (Power Matters Alliance), ST ensures full compatibility with these leading wireless-charging protocols and is one of the first companies that hold certification for the newest Qi 1.1.2 A11 standard. The STWBC performs all the essential functions for transmitter control: it is able to precisely control the amount of transmitted power to match the requirements of the receiving unit in terms of maximizing the efficiency of the power transfer and minimizing any increase in operating temperature. The digital feedback between TX and RX units also allows the detection of metal objects close to the receiver (foreign object detection FOD) that could result in potential hazards, enabling the STWBC to stop power transmission when such objects are detected.
Features
- Multiple Qi and PMA standards support
- Qi 1.1.2 A11-certified
- Up to 5W power capability for mobiles, wearables, remote controls
- Native support for half-bridge and full-bridge topologies
- 5V operating voltage.
Uniquely, the STWBC comes with firmware options to offer customers the ability to personalize their end product without the need of external microcontrollers:
- A turn-key Qi 1.1.2 A11 certified solution (reference design board STEVAL-ISB027V1), fully interoperable with Qi-enabled mobile phones
- API (application programming interface) access to customize the underlying firmware, for example modifying the behavior of the LEDs or GPIOs in response to the receiver behavior and supporting I²C and UART communication within a network
The device is offered together with a complete ecosystem to support customers in building their applications, including the Qi 1.1.2 A11-certified reference design board (STEVAL-ISB027V1), API libraries and documentation to develop software customizations, as well as a comprehensive graphical user interface to monitor real-time performance and diagnostics.
Housed in a VFQFPN32 package, the STWBC is available in full production at a price of US$3.00 in 1k volumes.
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | C | Tol. C | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(mA) | ISAT(A) | RDC(mΩ) | fres(MHz) | RDC max.(Ω) | Version | Winding Style | Number of windings | L1(µH) | Z(Ω) | IR(mA) | RDC max.(Ω) | VR(V) | Compliance | Size | L2(µH) | L3(µH) | IR DC1(A) | IR DC2(A) | IR DC3(A) | RDC2 max.(mΩ) | RDC3 max.(mΩ) | fres 1(MHz) | fres 2(MHz) | fres 3(MHz) | P(W) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMSW SMT Mono-color Side View Waterclear, 573 nm, Bright Green | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMSW SMT Mono-color Side View Waterclear | Dominant Wavelength [typ.]573 nm | Emitting ColorBright Green | Peak Wavelength [typ.]575 nm | Luminous Intensity [typ.]50 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]120 ° | – | – | Operating Temperature -40 °C up to +85 °C | – | – | – | Length3.2 mm | Width1.5 mm | Height1 mm | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size1204 | – | – | – | – | – | – | – | – | – | – | – | ||||
| WL-SMSW SMT Mono-color Side View Waterclear, 624 nm, Red | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMSW SMT Mono-color Side View Waterclear | Dominant Wavelength [typ.]624 nm | Emitting ColorRed | Peak Wavelength [typ.]632 nm | Luminous Intensity [typ.]130 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]120 ° | – | – | Operating Temperature -40 °C up to +85 °C | – | – | – | Length3.2 mm | Width1.5 mm | Height1 mm | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size1204 | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-SL5 HC SMT Common Mode Line Filter, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 HC SMT Common Mode Line Filter | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | Length9.5 mm | Width8.3 mm | Height5 mm | – | – | Inductance30 µH | Rated Current1400 mA | – | – | – | DC Resistance0.06 Ω | VersionSMT | Winding Stylesectional | Number of windings2 | Inductance [1]30 µH | Impedance2200 Ω | Rated Current1400 mA | DC Resistance [1]0.06 Ω | Rated Voltage80 V | – | – | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | Length5 mm | Width5 mm | Height4 mm | – | – | Inductance2.2 µH | Rated Current3800 mA | Saturation Current5.3 A | DC Resistance19 mΩ | Self Resonant Frequency77 MHz | – | – | – | – | – | – | – | – | – | – | Size5040 | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-PD SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +150 °C | – | – | – | Length10 mm | Width10 mm | Height5 mm | – | – | Inductance3.3 µH | Rated Current7500 mA | Saturation Current9 A | – | Self Resonant Frequency42 MHz | DC Resistance0.0105 Ω | VersionPerformance | – | Number of windings5.5 | – | – | – | – | – | – | Size1050 | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-WPCC Wireless Power Array, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Array | – | – | – | – | – | – | – | – | – | – | – | – | – | Length130 mm | Width54.7 mm | Height8 mm | – | – | – | – | – | – | – | – | VersionTHT | – | – | Inductance [1]12.5 µH | – | Rated Current9000 mA | DC Resistance [1]0.065 Ω | – | ComplianceQi - A6 | Size130 x 55 x 8 mm | Inductance [2]11.5 µH | Inductance [3]12.5 µH | Rated Current DC [1]9 A | Rated Current DC [2]9 A | Rated Current DC [3]9 A | DC Resistance [2]65 mΩ | DC Resistance [3]65 mΩ | Self Resonant Frequency [1]14 MHz | Self Resonant Frequency [2]14 MHz | Self Resonant Frequency [3]14 MHz | Power Capability [1]150 W | ||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance10 µF | Capacitance±20% | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width1.6 mm | Height1.6 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V | – | Size1206 | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance10 µF | Capacitance±20% | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width2.5 mm | Height2 mm | Pad Dimension0.75 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V | – | Size1210 | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance22 µF | Capacitance±20% | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.005 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V | – | Size1210 | – | – | – | – | – | – | – | – | – | – | – | |||||
 | 750315121 | Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | Length19.55 mm | Width23.75 mm | Height10.65 mm | – | PackagingTape and Reel | Inductance5 µH | – | Saturation Current8.5 A | – | – | – | – | – | – | – | – | – | – | – | – | SizeEPC17 | – | – | – | – | – | – | – | – | – | – | – |