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STMicroelectronics STWBC | Demoboard Steval-ISB028V1

Wireless QiA34 Reference Design

Overview

TopologyWireless Power Transfer
Input voltage3-5.5 V
Output 15 V / 1 A
IC revisionV1

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 Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
VinVOut1
(V)
IOut1
(A)
fswitch
(kHz)
L1
(µH)
NPRI : NSEC : NAUXISAT1
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MountCTol. CQmin.DF
(%)
Ceramic TypeTechnical ReferenceL
(µH)
IR
(mA)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
RDC typ.
(mΩ)
RDC max.
(Ω)
VersionWinding StyleNumber of windingsL1
(µH)
Z
(Ω)
IR 1
(mA)
RDC1 max.
(Ω)
VR
(V)
ComplianceSizeP
(W)
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)
Samples
155124VS73200
STE ALT EAG LTS PSP IGS CADWL-SMSW SMT Mono-color Side View Waterclear 573 Bright Green 575 50 2 AlInGaP 120 3.2 1.5 1 SMT 1204
155124RS73200
STE ALT EAG LTS PSP IGS CADWL-SMSW SMT Mono-color Side View Waterclear 624 Red 632 130 2 AlInGaP 120 3.2 1.5 1 SMT 1204
744273222
STE ALT EAG CAD LTS PSP IGS CAD SPAWE-SL5 HC SMT Common Mode Line Filter 500 9.5 8.3 5.3 SMT 30 1400 0.06 SMT sectional 2 30 2200 1400 0.06 80
74404054022
STE ALT EAG CAD LTS PSP SPE IGS CADWE-LQS SMT Power Inductor 5 5 4 SMT 2.2 3800 5.3 19 77 5040
7447714033
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 10 10 5 SMT 3.3 7500 9 42 8.9 0.0105 Performance 5.5 1050
760308106
STE 3D ALT EAG IGS CADWE-WPCC Wireless Power Array 10 130 54.7 8 THT 125 THT 12.5 9000 0.065 Qi - A6 130 x 55 x 8 mm 150 11.5 12.5 9 9 9 65 65 14 14 14
885012108021
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC) 3.2 1.6 1.610 µF ±20% 10 X5R Class II X5R1206106M025DFCT10000 25 1206
885012109013
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC) 3.2 2.5 210 µF ±20% 5 X5R Class II X5R1210106M025DFCT10000 25 1210
885012109014
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC) 3.2 2.5 2.522 µF ±20% 10 X5R Class II X5R1210226M025DFCT10000 25 1210
750315121
LTSMID-FLYSTM Flyback Transformers for STMicroelectronics 5 - 15 V (DC) 5 2 500 5 1:1 8.5 625 19.55 23.75 10.65 SMT EPC17
Samples
Order Code Data­sheet Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
VinVOut1
(V)
IOut1
(A)
fswitch
(kHz)
L1
(µH)
NPRI : NSEC : NAUXISAT1
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MountCTol. CQmin.DF
(%)
Ceramic TypeTechnical ReferenceL
(µH)
IR
(mA)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
RDC typ.
(mΩ)
RDC max.
(Ω)
VersionWinding StyleNumber of windingsL1
(µH)
Z
(Ω)
IR 1
(mA)
RDC1 max.
(Ω)
VR
(V)
ComplianceSizeP
(W)
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)
Samples