INTEGRATED WIRELESS POWER SUPPLY RECEIVER,
Qi (WIRELESS POWER CONSORTIUM) COMPLIANT

1FEATURES
• 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
• Supports 20-V Maximum Input
• Low-power Dissipative Rectifier Overvoltage
Clamp (VOVP = 15V)
• Thermal Shutdown
• Single NTC/Control Pin for Optimal Safety and
I/O Between Host
• Stand-alone Digital Controller
• 1.9 x 3mm DSBG or 4.5 x 3.5mm QFN Package

APPLICATIONS
• WPC Compliant Receivers
• Cell Phones, Smart Phones
• Headsets
• Digital Cameras
• Portable Media Players
• Hand-held Devices

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
utilizing 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 5W 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) utilize low
resistive NMOS FET’s to ensures high efficiency and
low power dissipation.