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Applications
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Applications
The bq50002EVM-607 evaluation module demonstrates the transmitter portion of the bqTESLA™ wireless
power system. This transmitter EVM is a complete transmitter-side solution that powers a bqTESLA
receiver. The EVM requires a single 5-V power supply capable of up to 2.0 A to operate and combines the
transmitter electronics, input power circuit, LED indicators, and the transmitting coil on the single printed-
circuit board (PCB). The open design allows easy access to key points of the electrical schematic.
This EVM has the following features:
•
Qi-Certified WPC 1.2 solution for 5-W operation
•
5-V input and fixed operation voltage
•
Enhanced Foreign Object Detection (FOD)
•
WPC 1.2 FOD
•
Transmitter-coil mounting pad providing the correct receiver interface
•
Highly-integrated analog front end including LDO, FETs, drivers, current sense amplifier, and de-
modulation circuit
•
Standard WPC A11-type transmitter coil with no magnet
•
LED and audio indication of power transfer
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bq50002EVM-607 Electrical Performance Specifications
provides a summary of the EVM performance specifications. All specifications are given for an
ambient temperature of 25°C.
Table 1. bq50002EVM-607 Electrical Performance Specifications
Parameter
Notes and Conditions
Min
Typ
Max
Unit
Input Characteristics
V
IN
Input voltage
4.5
5
5.5
V
I
IN
Input current
V
IN
= Nom, I
OUT
= 1 A at 5 V
1.4
A
Input no-load current
V
IN
= Nom, I
OUT
= 0 A
165
mA
Input stand-by current
V
IN
= Nom
4
mA
Output Characteristics – Receiver bq51013BEVM-764
V
OUT
Output voltage
V
IN
= Nom, I
OUT
= 1 A , V
OUT
= 5 V
4.95
5.00
5.04
V
Output ripple
V
IN
= Nom, I
OUT
= 1.0 A, V
OUT
= 5 V
200
mV
PP
I
OUT
V
IN
= Min to Max
V
IN
= Min to Max, V
OUT
= 5 V
0
1.5
A
Systems Characteristics
F
S
Switching frequency
During power transfer
110
205
kHz
η
pk
Peak efficiency
V
IN
= Nom, P Out RX = 3 W
74
%
η
Full-load efficiency
V
IN
= Nom, I
OUT
= Max
71
%
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bq50002 Wireless Power TX EVM
SLVUAJ7 – October 2015
Copyright © 2015, Texas Instruments Incorporated