Texas Instruments Evaluation Module for Qi-Compliant, Free-Positioning Wireless Power Transmitter Manager BQ500410AEVM-0 BQ500410AEVM-085 데이터 시트
제품 코드
BQ500410AEVM-085
0
10
20
30
40
50
60
70
80
0
1
2
3
4
5
5.5
Power (W)
Efficiency (%)
5-V Center Coil
12-V Center Coil
12-V Center Coil
G002
0
10
20
30
40
50
60
70
80
0
1
2
3
4
5
5.5
Power (W)
Efficiency (%)
Top Coil
Center Coil
Bottom Coil
Center Coil
Bottom Coil
G001
Test Setup
6.2.2.2
Apply Receivers
Place the bq51013AEVM-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, D4,
illuminates green, indicating that communication between the transmitter and the receiver is established
and that the power transfer has started.
and transmitting coils across each other. In the next few seconds, observe that the Status LED, D4,
illuminates green, indicating that communication between the transmitter and the receiver is established
and that the power transfer has started.
•
The TX buzzer sounds at the start of power transfer. Status LED, D4, flashes a green light during
power transfer.
power transfer.
•
Typical output voltage is 5 V, and the output current range is 0 mA to 1 A.
•
Observe a continuous drive waveform on the test point, TP1, when power transfer is active; the
frequency is between 110 kHz and 205 kHz depending on load.
frequency is between 110 kHz and 205 kHz depending on load.
•
Make tests and measurements applicable to a normal 5-V power supply.
6.2.2.3
Efficiency
To calculate system efficiency, measure the output voltage, the output current, input voltage, and input
current and calculate efficiency as the ratio of the output power to the input power. Connect voltage
meters at the input and output of TX and RX (see
current and calculate efficiency as the ratio of the output power to the input power. Connect voltage
meters at the input and output of TX and RX (see
). Average the input current; the comm pulses
modulate the input current, distorting the reading. See
for efficiency.
Figure 5. Efficiency Versus Power Across Each Coil, bq500410AEVM-085 Transmitter and bq51013AEVM-
764 Receiver
Figure 6. Efficiency Versus Power Center Coil 12-V Input Versus 5-V Input, bq500410-085 Transmitter and
bq51013AEVM-764 Receiver
12
bq500410A bqTESLA™ Wireless Power Transmitter EVM
SLVU688A – October 2012 – Revised December 2012
Copyright © 2012, Texas Instruments Incorporated