BQ500511 Datasheet, PDF (1/30 Pages) Texas Instruments – Low Cost 5-V Wireless Power Transmitter Controller

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bq500511
SLUSCD3A – AUGUST 2015 – REVISED OCTOBER 2015
bq500511 Low Cost 5-V Wireless Power Transmitter Controller
for WPC v1.2 A11 Transmitters
1 Features
•1 Digital Controller Compatible with Wireless Power
Consortium v1.2 A11 Specification
• Designed to be Used with bq50002 Analog Front
End
• Suitable for WPC and Proprietary 5-V Wireless
Power Transmitters
• Supports Received Power up to 5 W
• Two Chip Solution Enables High Efficiency
Transmitter Designs of >75%
• Ultra Low Standby Power, Even During Digital
Ping (<30 mW)
• Dynamic Power Limiting (DPL)™ Enables
Operation from Inputs Sources with Limited Power
• System LED Indication of Charging State and
Fault Status
• Accurate Foreign Object Detection Method (FOD)
Prevents Heating of Objects Between Transmitter
and Receiver Coils
2 Applications
• WPC Compliant Wireless Chargers for Smart
Phones and Wearable Applications
• Proprietary Wireless Chargers
• Medical and Industrial Applications
• Car and Other Vehicle Accessories
• See www.ti.com/wirelesspower for More
Information on TI’s Wireless Power Solutions
5-V
Input
Simplified Schematic
TRANSMITTER
bq50002
3V
PWM
Control
feedback
bq500511
Power
RECEIVER
Rectification
Voltage
Conditioning
Communication
bq51k
Controller
Load
3 Description
The bq500511 is a wireless power transmitter
controller that, when combined with the bq50002
analog front end device, integrates all functions
required to create a Qi-compliant or proprietary 5-V
transmitter. The bq500511 and bq50002 together
provide a compact wireless charger solution. The
bq500511 pings the surrounding environment for the
receiver devices to be powered, safely engages the
device, receives packet communication from the
powered device and manages the power transfer
according to WPC v1.2 specification.
To maximize flexibility in wireless power control
applications, Dynamic Power Limiting™ (DPL) is
featured on the bq500511. DPL enhances user
experience by seamlessly optimizing the usage of
power available from limited input supplies.
The system supports Foreign Object Detection (FOD)
by continuously monitoring the efficiency of the
established power transfer, protecting from power lost
due to metal objects misplaced in the wireless power
transfer field. Should any abnormal condition develop
during power transfer, the bq500511 handles the
condition and provides indication outputs.
Comprehensive status and fault monitoring features
enable a low cost yet robust Qi-certified wireless
power system design.
The bq500511 is available in a thermally enhanced 6
mm x 6 mm, 40-pin VQFN package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq500511
VQFN (40)
6.00 mm x 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
Power (W)
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.