Datasheet

+
-
V
A
Voltmeter
Ammeter
Power Supply
Oscilloscope
+
-
V
Wireless Transmitter
V
A
A
R
L
L
P
L
S
AC1
OUT-J2
V
IN
VRECT-TP12
AC2
GND-J4
OUT-TP7
Wireless Receiver
J1
POS
J2
RTN
TP1
AC1
TP2
AC2
Test Setup www.ti.com
6.2 Equipment Setup
• With the power supply OFF, connect the supply to the bqTESLA™ transmitter.
• Connect the V
IN
positive power source to J1, and connect the negative terminal of the V
IN
source to J2.
• Do not place the bqTESLA™ receiver on the transmitter. Connect a load to J3 with a return to J4,
monitor current through the load with the ammeter, and monitor the current to the load at TP7. All
voltmeters must be Kelvin connected (at the pin) to the point of interest.
6.2.1 Equipment Setup Diagram
The diagram in Figure 4 shows the test setup.
Figure 4. Equipment Setup
6.2.2 EVM Procedures
This section guides the user through a few general test procedures to exercise the functionality of the
presented hardware. Some key notes follow.
6.2.2.1 Start-Up No Receiver
Turn on V
IN
, and observe that the blue power LED, D1, illuminates. Status LEDs D7, D9 and D5 are OFF
until the power transfer starts.
Apply the scope probe to the test point, TP1, and observe single-pulse bursts approximately every 500
ms. This is a Digital Ping to begin communications with a receiver placed on the TX coil.
6.2.2.2 Apply Receivers
Place the bq51013BEVM-764 EVM on the top of the transmitting coil. Align the centers of the receiving
and transmitting coils across each other. In the next few seconds, observe that the status LED, D5,
flashes green, indicating that communication between the transmitter and the receiver is established and
that power transfer has started.
• The status LED, D5, flashes a green light during power transfer.
• Typical output voltage is 5 V, and the output current range is 0 mA to 1 A.
• Observe a continuous sine-wave on the test point TP1 when power transfer is active; the frequency is
between 110 kHz and 205 kHz.
• Make tests and measurements applicable to a normal 5-V power supply.
12
bq500212A bqTESLA Wireless Power TX EVM SLVU928A–September 2013–Revised October 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated