BQ51003 Datasheet, PDF (1/34 Pages) Texas Instruments – Highly Integrated Wireless Receiver Qi (WPC v1.1) Compliant Power Supply

bq51003
www.ti.com
SLUSBC8 – DECEMBER 2013
Highly Integrated Wireless Receiver Qi (WPC v1.1) Compliant Power Supply
Check for Samples: bq51003
FEATURES
1
• 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
APPLICATIONS
• WPC Compliant Receivers
• Cell Phones, Smart Phones
• Headsets
• Digital Cameras
• Portable Media Players
• Hand-held Devices
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.
AC to DC
Power
bq51003
Drivers
Rectification
Voltage
Conditioning
Communication
Load
Controller
V/I
Sense
bq500210
Transmitter
Controller
Receiver
Figure 1. Wireless Power Consortium (WPC or
Qi) Inductive Power System
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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