BQ51013A Datasheet, PDF (1/45 Pages) Texas Instruments – INTEGRATED WIRELESS POWER SUPPLY RECEIVER

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bq51013A
bq51014
SLUSAY6A – MARCH 2012 – REVISED JUNE 2012
INTEGRATED WIRELESS POWER SUPPLY RECEIVER,
Qi (WIRELESS POWER CONSORTIUM) COMPLIANT
Check for Samples: bq51013A, bq51014
FEATURES
1
• Integrated Wireless Power Receiver Solution
with a 5V Regulated Supply
– 93% Overall Peak AC-DC Efficiency
– Full Synchronous Rectifier
– WPC v1.0 Compliant Communication
Control
– Output Voltage Conditioning
– Only IC Required Between RX coil and 5V
DC Output Voltage
• Dynamic Rectifier Control for Improved Load
Transient Response
• Dynamic Efficiency Scaling for Optimized
Performance Over any Range of Output Power
• Adaptive Communication Limit for Robust
Communication During High Levels of Load
Current Noise
• Supports 20-V Maximum Input
• Low-power Dissipative Rectifier Overvoltage
Clamp (V_OVP = 15V)
• Thermal Shutdown
• Multifunction NTC and Control Pin for
Temperature Monitoring, Done Charging and
Fault Host Control
• Stand-alone Digital Controller
• Programmable Termination Pin for Charge
Status 100% (CS100) Support
• 1.9 x 3mm DSBG or 4.5 x 3.5mm QFN Package
DESCRIPTION
The bq5101x 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 v1.0 communication protocol. Together
with the bq500210 transmitter controller, the bq5101x
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 v1.0 communication
protocol supporting up to 5 W applications.
The device integrates a low-impedance full
synchronous rectifier, low-dropout regulator, digital
control, and accurate voltage and current loops. The
entire power stage (rectifier and LDO) use low
resistive NMOS FET’s to ensures high efficiency and
low power dissipation.
AC to DC
Power
bq5101x
Drivers
Rectification
Voltage
Conditioning
Communication
Load
APPLICATIONS
• WPC Compliant Receivers
• Cell Phones, Smart Phones
• Headsets
• Digital Cameras
• Portable Media Players
• Hand-held Devices
Controller
V/I
Sense
bq500210
Transmitter
Controller
Receiver
Figure 1. Wireless Power Consortium
(WPC or Qi) Inductive Power System
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
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 © 2012, Texas Instruments Incorporated