Datasheet

AC to DC
Voltage
Conditioning
Controller
RectificationDrivers Load
Controller
V/I
Sense
Power
Transmitter Receiver
bq5101x
bq500210
Communication
bq51013B
www.ti.com SLUSB62A –MARCH 2013–REVISED OCTOBER 2013
TYPICAL CHARACTERISTICS (continued)
Figure 25. Rx Communication Packet Structure
(1) Efficiency measured from DC input to the transmitter to DC output of the receiver. Transmitter was the bq500210 EVM. Measurement
subject to change if an alternate transmitter is used.
(2) Curves illustrates the resulting I
LIM
current by sweeping the output voltage at different R
ILIM
settings. ILIM current collapses due to the
increasing power dissipation as the voltage at the output is decreased—thermal shutdown is occurring.
(3) Total droop experienced at the output is dependent on receiver coil design. The output impedance must be low enough at that particular
operating frequency in order to not collapse the rectifier below 5V.
(4) On the go mode is enabled by driving EN1 high. In this test the external PMOS is connected between the output of the bq51013B IC
and the AD pin; therefore, any voltage source on the output is supplied to the AD pin.
PRINCIPLE OF OPERATION
Figure 26. WPC Wireless Power System Indicating the Functional Integration of the bq5101xB
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