Electronic Components Datasheet Search |
|
BQ500110RGZT Datasheet(PDF) 8 Page - Texas Instruments |
|
|
BQ500110RGZT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page Modulation Rectifier Receiver Coil Receiver Capacitor Modulation Resitor Amax A(0) A(1) F, kHz Fsw Operating state at logic “0” Operating state at logic “1” a) b) bq500110 SLUSAE0A – NOVEMBER 2010 – REVISED APRIL 2011 www.ti.com FUNCTIONAL OVERVIEW The typical Wireless Power Transfer System consists of the primary and the secondary coils that are positioned against each other in the way to maximize mutual coupling of their electromagnetic fields. Both coils have ferrite shields as parts of their structure to even further maximize field coupling. The primary coil is exited with the switching waveform of the transmitter power driver that gets its power from AC-DC wall adapter. The secondary coil is connected to the rectifier that can either directly interface the battery or can have an electronic charger or post-regulator connected to its output. The capacitors in series with the coils are tuned to create resonance in the system. The system being in resonance facilitates better energy transfer compared to the inductive transfer. Power transfer in the resonant system can also be easier controlled with the variable frequency control approach. The rectifier output voltage is monitored by the secondary side microcontroller that generates signals to control modulation circuit to pass coded information from the secondary side to the primary side. The coded information is organized into information packets that have Preamble bytes, Header bytes, message bytes and the Checksum bytes. Per WPC standard information packets can be related to Identification, Configuration, Control Error, Rectified Power, Charge Status and End of Power Transfer. For detailed information on WPC standard visit Wireless Power Consortium web site at http://www.wirelesspowerconsortium.com/. There are two ways the coupled electromagnetic field can be manipulated to achieve information transfer from the secondary side to the primary side. With resistive modulation approach shown in Figure 3, the communication resistor periodically loads the rectifier output changing system Q factor and as a result value of the voltage on the primary side coil. With capacitive modulation approach shown in Figure 4 a pair of communication capacitors are periodically connected to the receiver coil network. These extra capacitance application changes slightly the resonance frequency of the system and its response on the current operating frequency, which in turn leads to coil voltage variation on the primary side. With both modulation techniques primary side coil voltage variations are detected with demodulation circuit and further interpreted in bq500110 to restore the content of the information packets and adjust controls to the transmitter schematic. Figure 3. Resistive Modulation Circuit 8 Submit Documentation Feedback Copyright © 2010–2011, Texas Instruments Incorporated Product Folder Link(s) :bq500110 |
Similar Part No. - BQ500110RGZT |
|
Similar Description - BQ500110RGZT |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |