BQ51050B Datasheet, PDF (1/31 Pages) Texas Instruments – High-Efficiency Qi v1.1-Compliant Wireless Power Receiver and Battery Charger

bq51050B
bq51051B
www.ti.com
SLUSB42C – JULY 2012 – REVISED FEBRUARY 2013
High-Efficiency Qi v1.1-Compliant Wireless Power Receiver and Battery Charger
Check for Samples: bq51050B, bq51051B
FEATURES
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• Single-Stage Wireless Power Receiver
and Li-Ion/Li-Pol Battery Charger
– Combines Wireless Power Receiver,
Rectifier and Battery Charger in a Single
Small Package
– 4.2V and 4.35V Output Voltage Options
– Supports up to 1.5A Charging Current
– 93% Peak AC-DC Charging Efficiency
• Robust Architecture
– 20V Maximum Input Voltage Tolerance,
with Input OV Protection Clamp
– Thermal Shutdown and Over Current
Protection
– Temperature Monitoring and Fault
Detection
• Compatible with WPC v1.1 “Qi” Industry
Standard
• Power Stage Output Tracks Rectifier and
Battery Voltage to Ensure Maximum Efficiency
Across the Full Charge Cycle
• Available in small WCSP and QFN packages
APPLICATIONS
• Battery Packs
• Cell Phones, Smart Phones
• Headsets
• Portable Media Players
• Other Hand-Held Devices
DESCRIPTION
The bq5105x is a high efficiency, wireless power receiver with Li-Ion/Li-Pol battery charge controller for portable
applications. The bq5105x device provides efficient AC/DC power conversion, integrates digital controller
required to comply with Qi v1.1 communication protocol and all necessary control algorithms needed for efficient
and safe Li-Ion and Li-Pol battery charger. Together with bq500210 transmitter-side controller, the bq5105x
enables a complete wireless power transfer system for direct battery charger solution. By utilizing near-field
inductive power transfer, the receiver coil embedded in the portable device can pick up the power transmitted by
transmitter coil. The AC signal from the receiver coil is then rectified and conditioned to apply power directly to
the battery. Global feedback is established from the receiver to the transmitter in order to stabilize the power
transfer process. This feedback is established by utilizing the Qi v1.1 communication protocol.
The bq5105x devices integrate a low-impedance synchronous rectifier, low-dropout regulator, digital control,
charger controller, and accurate voltage and current loops in a single package. The entire power stage (rectifier
and LDO) utilize low resistive N-MOSFET’s (100mΩ typical Rdson) to ensures high efficiency and low power
dissipation.
USB or
AC Adapter
Input
C5
TI
Wireless
Power
Transmitter
TX
COIL
Q1
bq5105xB
/AD-EN
AD
CCOMM1
COMM1
CBOOT1
BOOT1
C1
AC1
RX
COIL
C2
AC2
BATT
RECT
TS
CBOOT2
CCOMM2
CCLAMP2
CCLAMP1
BOOT2
COMM2
CLAMP2
CLAMP1
ILIM
FOD
/CHG
TERM
EN2
PGND
R1
RFOD
Wired
Charger
C4
C3
ROS
R5
D1
R4
PACK+
NTC
PACK-
Tri-State
Bi-State
HOST
Figure 1. Typical System Blocks Show bq5105xB Used as a Wireless Power Li-Ion/Li-Pol Battery Charger
Note: Visit ti.com/wirelesspower for product details and design resources
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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 © 2012–2013, Texas Instruments Incorporated