BQ51025 Datasheet, PDF (1/49 Pages) Texas Instruments – Compliant Single Chip Wireless Power Receiver

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq51025
SLUSBX7B – SEPTEMBER 2014 – REVISED MARCH 2015
bq51025 WPC v1.1 Compliant Single Chip Wireless Power Receiver
With Proprietary 10-W Power Delivery
1 Features
•1 Robust 10-W Receiver Solution Using Proprietary
Protocol With TI's 10-W bq500215 Transmitter
– Post-Regulation LDO to Protect External
Charger Input from Rectifier Output Transients;
Inductorless Solution for Lowest Height
– Adjustable Output Voltage (4.5 to 10 V) for
Coil and Thermal Optimization
– Supports 2S Battery Configuration (Non-WPC
compliant)
– Fully Synchronous Rectifier With 96%
Efficiency
– 97% Efficient Post Regulator
– 84% System Efficiency at 10 W
• WPC v1.1 Compliant Communication and Control
for Compatibility With Current TX Solutions
• Patented Transmitter Pad Detect Function
Improves User Experience
• Power Signal Frequency Measurement Allows
Host to Determine Optimal Placement on TX
Surface
• I²C Communication With Host
2 Applications
• Smart Phones, Tablets, and Headsets
• Point-of-Sale Devices
• 2S Battery Applications
• Power Banks
• Other Portable Devices
3 Description
The bq51025 device is a fully-contained wireless
power receiver capable of operating in the Wireless
Power Consortium (WPC) Qi protocol, which allows a
wireless power system to deliver 5 W to the system
with Qi inductive transmitters and up to 10 W when
operating with the bq500215 primary-side controller.
The bq51025 device provides a single device power
conversion (rectification and regulation) as well as the
digital control and communication as per WPC v1.1
specification. With market-leading 84% system
efficiency and adjustable output voltage, the bq51025
device allows for unparalleled system optimization.
With a maximum output voltage of 10 V, the bq51025
offers a flexible solution that offers a wireless power
solution for 2S battery application and allows optimal
thermal performance of the system. The I²C interface
allows system designers to implement new features
such as aligning a receiver on the transmitter surface
or detecting foreign objects on the receiver. The
bq51025 device complies with the WPC v1.1
communication protocol making it compatible with all
WPC transmitter solutions. 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)
bq51025
DSBGA (42)
3.60 mm × 2.89 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
bq51025
AD-EN
AD
CCOMM1
COMM1
CBOOT1
BOOT1
C1
AC1
OUT
RECT
COIL
C2
VO_REG
C4
R7
C3
R6
AC2
CBOOT2
CCOMM2
CCLAMP2
CCLAMP1
BOOT2
COMM2
CLAMP2
CLAMP1
PMODE
CM_ILIM
ILIM FOD
VIREG
TS/CTRL
TMEM
C5
WPG
PD_DET
SCL
SDA
PGND
NTC
RMEM
R1 _RFOD
RECT
R8
R9
1
System
Load
HOST
bq51025 System Efficiency With bq500215 TX
Controller
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
V_OUT = 10V
V_OUT = 7V
V_OUT = 5V
0
0 1 2 3 4 5 6 7 8 9 10
Output Power (W)
D001
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.