Test Results
7.2
Load Step
The procedure for load step in PMA mode is as follows:
•
Set up the test bench as described in
•
Power PMA TX with 18 V or with the PMA power adapter
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Connect the output of RX to a battery charger (bq24250EVM-150) to charge a battery
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Set the VIN_DPM of the charger to 4.6 V
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Set a battery voltage to full charge state and connect system load to system output of the charger.
Then, put the receiver EVM on the transmitter coil and align them correctly.
•
Provide a load step from no-load (high impedance) to 1000-mA on the system load
•
Monitor on side RX: load current, rectifier voltage, and output voltage as shown in
Figure 3. Load Step (PMA) with VIN_DPM
12
Dual Mode (WPC and PMA) Integrated Wireless Receiver Power Supply
SLUUAX6B – February 2014 – Revised June 2014
Copyright © 2014, Texas Instruments Incorporated