Datasheet

AC to DC
Voltage
Conditioning
Controller
RectificationDrivers RectificationDrivers Load
Controller
V/I
Sense
Power
Transmitter Receiver
bqTESLA150LP: Receiver Integration 1/5 of the Area Savings
th
bq5101x
bq500210
Communication
V
OUT
V
RECT
V
RECT
I
OUT
V
OUT
bq51011
bq51013
SLVSAT9D –APRIL 2011–REVISED AUGUST 2012 www.ti.com
TYPICAL CHARACTERISTICS (continued)
Figure 22. bq51011 Output Voltage Transition Figure 23. bq51011 Output Current Transition (I
LOAD
< I
ILIM
≥
I
LOAD
= I
ILIM
) lIlustrating Dynamic Communication Current
(V
OUT
= 4.8V -> 3.5V) Illustrating V
RECT-TRACK
Limit
(1) 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.
(2) 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.
(3) On the go mode is enabled by driving EN1 high. In this test the external PMOS is connected between the output of the bq5101x IC and
the AD pin, therefore any voltage source on the output is supplied to the AD pin.
PRINCIPLE OF OPERATION
Figure 24. WPC Wireless Power System Indicating the Functional Integration of the bq5101x
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Product Folder Links: bq51011 bq51013