SLUSBC8 – DECEMBER 2013
Highly Integrated Wireless Receiver Qi (WPC v1.1) Compliant Power Supply
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FEATURES
Integrated Wireless Power Supply Receiver
Solution - Optimized for 2.5-W Applications
– 93% Overall Peak AC-DC Efficiency
– Full Synchronous Rectifier
– WPC v1.1 Compliant Communication
Control
– Output Voltage Conditioning
– Only IC Required Between Rx coil and
Output
Wireless Power Consortium (WPC) v1.1
Compliant (FOD Enabled) Highly Accurate
Current Sense
Dynamic Rectifier Control for Improved Load
Transient Response
Dynamic Efficiency Scaling for Optimized
Performance Over wide Range of Output
Power
Adaptive Communication Limit for Robust
Communication
Supports 20-V Maximum Input
Low-power Dissipative Rectifier Overvoltage
Clamp (V
RECT-OVP
= 15 V)
Thermal Shutdown
Multifunction NTC and Control Pin for
Temperature Monitoring, Charge Complete and
Fault Host Control
1.9-mm x 3.0-mm DSBGA
DESCRIPTION
The bq51003 is an advanced, integrated, receiver IC
for wireless power transfer in portable 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 via 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 in order to stabilize the power transfer
process via 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.
Power
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bq51003
Voltage
Conditioning
AC to DC
Drivers
Rectification
Load
Communication
Controller
V/I
Sense
Controller
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bq500210
Transmitter
Receiver
APPLICATIONS
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WPC Compliant Receivers
Cell Phones, Smart Phones
Headsets
Digital Cameras
Portable Media Players
Hand-held Devices
Figure 1. Wireless Power Consortium (WPC or
Qi) Inductive Power System
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated