1 Features
• Integrated Wireless Power Supply Receiver
Solution
– 93% Overall peak AC-DC efficiency
– Full synchronous rectifier
– WPC v1.2 compliant communication control
– Output voltage conditioning
– Only IC required between Rx coil and output
• Wireless power consortium (WPC) v1.2 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
(VOVP = 15 V)
• Thermal shutdown
• Multifunction NTC and control pin for temperature
monitoring, charge complete, and fault host control

2 Applications
• WPC v1.2 compliant receivers
• Cell phones and smart phones
• Headsets
• Digital cameras
• Portable media players
• Handheld devices

3 Description
The BQ51013B device is a single-chip, advanced,
flexible, secondary-side device for wireless power
transfer in portable applications capable of providing
up to 5 W. The BQ51013B devices provide the
receiver (RX) AC-to-DC power conversion and
regulation while integrating the digital control required
to comply with the Wireless Power Consortium (WPC)
Qi v1.2 communication protocol. Together with the
BQ50012A primary-side controller (or other Qi
transmitter), the BQ51013B enables a complete
contactless power transfer system for a wireless
power supply solution. Global feedback is established
from the secondary to the primary to control the power
transfer process using the Qi v1.2 protocol.
The BQ51013B integrates a low-resistance
synchronous rectifier, low-dropout regulator (LDO),
digital control, and accurate voltage and current loops
to ensure high efficiency and low power dissipation.
The BQ51013B also includes a digital controller that
calculates the amount of power received by the
mobile device within the limits set by the WPC v1.2
standard. The controller then communicates this
information to the transmitter (TX) to allow the TX to
determine if a foreign object is present within the
magnetic interface and introduces a higher level of
safety within magnetic field. This Foreign Object
Detection (FOD) method is part of the requirements
under the WPC v1.2 specification.