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EVM Receiver Tests
A variety of tests can be performed with the use of the TSWITX-G2- EVM transmitter module.
Connect a USB cable from any USB port capable of driving up to 2 watts (most PCs will suffice) to the
USB port on the TSWITX-G2- EVM. On application of power, its green LED should light, indicating the
board is now active.
In order to use the TSWIRX-LI-EVM as a target receiver, simply place the receiver over the target circle
(the 'primary coil' or 'transmitter antenna') on the transmitter EVM module, then connect a battery to the
J2 of receiver. Connect a DC voltmeter across the VOUT+ and GND pins to monitor the voltage, and a
DC ammeter in series with the VOUT+ line to monitor the chaging current. Set levels to allow for up to 10
volts and 1 amp to be observed.
The LED should be light green, which indicate charging begins after a valid charging input is applied and
the VIN pin is great than UVLO level.
J4 jumper is for ENB pin input select. The ENB pin is a tri-level logical input that allows select of 3 beviors:
1) ENB to gound (jummer pin2-3), charging enabled with float-charing after termination;
2) ENB float (no jummper), charing enabled with float-charing disabled and battery monitoring at
termination;
3) ENB to high (jumper pin1-2), charging disabled.
The CC mode is active when battery voltage is above VTpreg and less than Vcv. The programmed CC
regulation fast-charge (FQ) current can be set through IPRGM resistor (IFQ=0.204/RIPRGM). The default
current set is 250mA (IPRGM=8.06Kohm).
TSWIRX-5V-EVM
User Guide
www.semtech.com
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Rev 1.00
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