TSDMRX-19V Datasheet, PDF (7/18 Pages) –

Measure Efficiency
By measuring the power from the receiver’s VOUT+ and - pins in comparison to the power entering the transmitter
EVM, you can determine the efficiency of the power transfer through the system. For the EVMs used here
(TSDMRX-19V20W-EVM on TSDMTX-19V2-EVM), the diagram below demonstrates that DC-DC efficiency is a
function of output current, and runs about 85% at higher power levels, assuring good efficiency and minimal heat
dissipation concerns. In certain applications a heatsink or heatspreader may need to be attached to the PCB to
keep the temperature within desired limits.
Wireless Charging
User Guide
TSDMRX-19V20W-EVM
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6 of 17
Rev 1.4
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