BQ51020 Datasheet, PDF (1/45 Pages) Texas Instruments – Single-Chip Wireless Power Receiver

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq5102x 5-W (WPC) Single-Chip Wireless Power Receiver
bq51020, bq51021
SLUSBX1 – MAY 2014
1 Features
•1 Robust 5-W Solution With 50% Lower Losses for
Improved Thermals
– Inductorless Receiver for Lowest Height Profile
Solution
– Adjustable Output Voltage (4.5 to 8 V) for Coil
and Thermal Optimization
– Fully Synchronous Rectifier With 96%
Efficiency
– 97% Efficient Post Regulator
– 79% System Efficiency at 5 W
• WPC v1.1 Compliant Communication
• Patented Transmitter Pad Detect Function
Improves User Experience
• Alignment Feature Through I²C Allows for User
Training to Find Best Position on Surface of TX
2 Applications
• Smart Phones, Tablets, and Headsets
• Wi-Fi Hotspots
• Power Banks
• Other Handheld Devices
3 Description
The bq5102x device is a fully contained wireless
power receiver capable of operating with the WPC
v1.1 protocol which allows a wireless power system
to deliver up to 5 W to the system when used with a
Qi inductive transmitter. The bq5102x device provides
a single device power conversion (rectification and
regulation) as well as the digital control and
communication for WPC specification. With market-
leading efficiency and adjustable output voltage, the
bq5102x device allows for unparalleled efficiency and
system optimization. I²C also allows system
designers to implement interesting new features such
as aligning a receiver on the transmitter surface, or
detecting foreign objects on the receiver. The receiver
allows for synchronous rectification, regulation and
control and communication to all exist in a market
leading form factor, efficiency, and solution size.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq51020
bq51021
DSBGA (42)
3.60 × 2.89 mm²
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
AD-EN
bq5102X
AD
CCOMM1
COMM1
CBOOT1
BOOT1
C1
AC1
OUT
C4
RECT
C3
COIL
C2
AC2
CBOOT2
CCOMM2
CCLAMP2
CCLAMP1
BOOT2
COMM2
CLAMP2
CLAMP1
TERM
CM_ILIM
ILIM FOD
VO_REG
VTSB
TS/CTRL
TMEM
C5
WPG
PD_DET
SCL
SDA
PGND
R7
R6
z
z _NTC
R1
RFOD
System
Load
HOST
bq5102x System Efficiency 5-V Out
90
80
70
60
50
40
30
20
10
WPC A1 TX
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
I_OUT (A)
D001
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.