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.