BQ51050B_16 Datasheet, PDF (1/43 Pages) Texas Instruments – High-Efficiency Qi v1.1-Compliant Wireless Power Receiver

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bq51050B, bq51051B, bq51052B
SLUSB42E – JULY 2012 – REVISED MARCH 2015
bq5105xB High-Efficiency Qi v1.1-Compliant Wireless Power Receiver
and Battery Charger
1 Features
•1 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
– 4.20-V, 4.35-V, and 4.40-V Output Voltage
Options
– Supports a Charging Current up to 1.5 A
– 93% Peak AC-DC Charging Efficiency
• Robust Architecture
– 20-V Maximum Input Voltage Tolerance,
With Input Overvoltage Protection
– Thermal Shutdown and Overcurrent 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 DSGBA and VQFN Packages
2 Applications
• Battery Packs
• Cell Phones and Smart Phones
• Headsets
• Portable Media Players
• Other Handheld Devices
3 Description
The bq5105x device is a high-efficiency, Qi-compliant
wireless power receiver with an integrated Li-Ion/Li-
Pol battery charge controller for portable applications.
The bq5105xB devices provide efficient AC-DC
power conversion, integrates the digital controller
required to comply with Qi v1.1 communication
protocol, and provides all necessary control
algorithms needed for efficient and safe Li-Ion and Li-
Pol battery charging. Together with the bq500212A
transmitter-side controller, the bq5105x enables a
complete wireless power transfer system for direct
battery charger solutions. By using 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 to
stabilize the power transfer process. This feedback is
established by using the Qi v1.1 communication
protocol.
The bq5105xB devices integrate a low-impedance
synchronous rectifier, low-dropout regulator (LDO),
digital control, charger controller, and accurate
voltage and current loops in a single package. The
entire power stage (rectifier and LDO) use low-
resistance N-MOSFETs (100-mΩ typical Rdson) to
ensure high efficiency and low power dissipation.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq51050B
bq51051B
bq51052B
VQFN (20)
DSBGA (28)
4.50 mm × 3.50 mm
3.00 mm × 1.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
bq5105xB
AD-EN
TI
Wireless
Power
Transmitter
TX
COIL
C1
RX
COIL
CCOMM1
CBOOT1
AD
COMM1
BOOT1
AC1
C2
AC2
BAT
RECT
TS/CTRL
CBOOT2
CCOMM2
CCLAMP2
CCLAMP1
BOOT2
COMM2
CLAMP2
CLAMP1
ILIM
FOD
CHG
TERM
EN2
PGND
R1
RFOD
C4
C3
ROS
R5
D1
R4
PACK+
NTC
PACK-
Tri-State
Bi-State
HOST
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.