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Overview
| Topology | Buck Converter |
| Input voltage | 4-10 V |
| Output 1 | 8 V / 1.5 A |
| IC revision | A |
Description
The bq51221 device is a fully contained wireless power receiver capable of operating in both the WPC and PMA protocols which allows a wireless power system to work with both WPC and PMA inductive charging standards. The bq51221 device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for both standards. It also has autonomous detection of protocol and requires no additional active devices. The bq51221 device complies with the WPC v1.1 and PMA communication protocol. Together with the WPC or a PMA primary-side controller, the bq51221 device enables a complete wireless power transfer system for a wireless power supply solution. The receiver allows for synchronous rectification, regulation and control and communication to all exist in a market-leading form factor, efficiency, and solution size.
Features
- Robust 5-W Solution With 50% Lower Losses for Improved Thermals
- Inductorless Receiver for Lowest Height Profile Solution
- Adjustable Output Voltage (4.5 to 8 V) for Coil and Thermal Optimization
- Fully Synchronous Rectifier With 96% Efficiency
- 97% Efficient Post Regulator
- 79% System Efficiency at 5 W
- WPC v1.1 and PMA Compliant Communication
- Patented Transmitter Pad Detect FunctionImproves User Experience
- I2C Communication with Host
Typical applications
- Power Banks
- Smart Phones, Tablets, and Headsets
- Wi-Fi Hotspots
- Handheld Devices
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Compliance | Size | L(µH) | IR(A) | RDC max.(mΩ) | fres(MHz) | Q(%) | P(W) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, 37 x 37 x 1.8 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Receiver Coil | Complianceworks with Qi Rx IC's | Size37 x 37 x 1.8 mm | Inductance10 µH | Rated Current3.5 A | DC Resistance200 mΩ | Self Resonant Frequency15 MHz | Q-Factor50 % | Power Capability [1]60 W |