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Overview
| Topology | Wireless Power Transfer |
| Input voltage | 4-10 V |
| Output 1 | 0.5 A |
| IC revision | 00 |
Description
The bq51003 is an advanced, integrated, receiver IC for wireless power transfer in portable applications optimized for 2.5-W and below applications. The device provides the AC-DC power conversion while integrating the digital control required to comply with the Qi v1.1 communication protocol. Together with the bq500210 transmitter controller, the bq51003 enables a complete contact-less power transfer system for a wireless power supply solution. By using near-field inductive power transfer, the receiver coil embedded in the portable device receives the power transmitted by the transmitter coil through mutually coupled inductors. The AC signal from the receiver coil is then rectified and regulated to be used as a power supply for down-system electronics. Global feedback is established from the secondary to the transmitter to stabilize the power transfer process through back-scatter modulation. This feedback is established by using the Qi v1.1 communication protocol supporting up to 2.5-W applications.The device integrates a low-impedance full synchronous rectifier, low-dropout regulator, digital control, and accurate voltage and current loops.
Features
Integrated Wireless Power Supply ReceiverSolution – Optimized for 2.5-W Applications 93% Overall Peak AC-DC EfficiencyFull Synchronous RectifierWPC v1.1 Compliant Communication ControlOutput Voltage ConditioningOnly IC Required Between Rx coil and Output
Wireless Power Consortium (WPC) v1.1Compliant (FOD Enabled) Highly AccurateCurrent SenseDynamic Rectifier Control for Improved LoadTransient ResponseDynamic Efficiency Scaling for OptimizedPerformance Over Wide Range of Output PowerAdaptive Communication Limit for RobustCommunicationSupports 20-V Maximum InputLow-power Dissipative Rectifier OvervoltageClamp (VRECT-OVP = 15 V)Thermal ShutdownMultifunction NTC and Control Pin forTemperature Monitoring, Charge Complete andFault Host Control
Typical applications
- Portable Media Players
- Digital Cameras
- Headsets
- Cell Phones and Smart Phones
- WPC Compliant Receivers
- Hand-held Devices
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | µʹ @ 1 MHz | µʹ @ 13.56 MHz | µʹʹ @ 13.56 MHz | L(mm) | W(mm) | H(mm) | RS(GΩ) | ISAT(A) | RDC(mΩ) | Compliance | Size | L(µH) | IR(A) | RDC max.(mΩ) | fres(MHz) | Q(%) | P(W) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-FSFS Flexible Sintered Ferrite Sheet, 230, 150 | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FSFS Flexible Sintered Ferrite Sheet | Complex Permeability230 | Complex Permeability150 | Complex Permeability90 | Length60 mm | Width60 mm | Height0.2 mm | Surface Resistance1 GΩ | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | Length2.5 mm | Width2 mm | Height1.2 mm | – | Saturation Current0.8 A | DC Resistance430 mΩ | – | Size2512 | Inductance10 µH | Rated Current0.65 A | – | Self Resonant Frequency30 MHz | – | – | ||||
 | WE-WPCC Wireless Power Transfer Receiver Coil, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Receiver Coil | – | – | – | Length28.9 mm | Width15.7 mm | Height0.76 mm | – | Saturation Current3 A | – | ComplianceQi - Airfuel Alliance | Size28,9 x 15,7 x 0,76 mm | Inductance7.5 µH | Rated Current1.55 A | DC Resistance380 mΩ | Self Resonant Frequency23 MHz | Q-Factor16 % | Power Capability [1]20 W |