Texas Instruments BQ51050BEVM-764 Evaluation Module BQ51050BEVM-764 BQ51050BEVM-764 데이터 시트
제품 코드
BQ51050BEVM-764
Rx Shutdown
conditions per the EPT
Table?
Send EPT packet with
reason value
IOUT < 20% of IMAX?
VRECT target = 5.11V.
Send control error packets
to converge.
Yes
No
IOUT >20% of IMAX?
VRECT target =Vbat
+300mV. Send control
error packets to converge.
Yes
No
VRECT target = 5.1V.
Send control error packets
to converge.
Yes
No
Rx Active
Power Transfer
Stage
Tx Powered
without Rx
Active
Measure Rectified Power
and Send Value to Tx
TERM STATE
BQ5105xB?
Yes
No
SLUSB42D – JULY 2012 – REVISED JANUARY 2014
Figure 19. Active Power Transfer Flow Diagram
Once the startup procedure has been established, the Rx will enter the active power transfer stage. This is
considered the “main loop” of operation. The Dynamic Rectifier Control algorithm will determine the rectifier
voltage target based on a percentage of the maximum output current level setting (set by KIMAX and the I
considered the “main loop” of operation. The Dynamic Rectifier Control algorithm will determine the rectifier
voltage target based on a percentage of the maximum output current level setting (set by KIMAX and the I
LIM
resistance to GND). The Rx will send control error packets in order to converge on these targets. As the output
current changes, the rectifier voltage target will dynamically change. As a note, the feedback loop of the WPC
system is relatively slow where it can take up to 90 ms to converge on a new rectifier voltage target. It should be
understood that the instantaneous transient response of the system is open loop and dependent on the Rx coil
output impedance at that operating point. More details on this will be covered in the section Receiver Coil Load-
Line Analysis. The “main loop” will also determine if any conditions are true and will then discontinue the power
transfer. See
current changes, the rectifier voltage target will dynamically change. As a note, the feedback loop of the WPC
system is relatively slow where it can take up to 90 ms to converge on a new rectifier voltage target. It should be
understood that the instantaneous transient response of the system is open loop and dependent on the Rx coil
output impedance at that operating point. More details on this will be covered in the section Receiver Coil Load-
Line Analysis. The “main loop” will also determine if any conditions are true and will then discontinue the power
transfer. See
which illustrates the active power transfer loop.
16
Copyright © 2012–2014, Texas Instruments Incorporated
Product Folder Links: