Modifications
•
Room above coil for testing with battery, key for Foreign Object Detection (FOD) tuning
•
Options to adjust the input current limit and output voltage using resistors
•
Flexibility for Foreign Object Detection (FOD) tuning
•
Adjustable resistor that can be used to set RFOD
•
Temperature sensing can be adjusted using external resistors
•
Micro-USB connector for adapter testing configuration
•
WPG LED indicator (turns on as V
OUT
goes high)
•
PD_DET LED indicator --turns on as the RX is on TX pad
3
Modifications
See the data sheet (
) when changing components. To aid in such customization of the EVM, the
board was designed with devices having 0402 and 0603 or larger footprints. A real implementation likely
occupies less total board space.
Note that changing components can improve or degrade EVM performance.
4
Recommended Operation Condition
provides a summary of the bq51020EVM-520 performance specifications. All specifications are
given for an ambient temperature of 25°C.
Table 1. bq51020EVM-520 Electrical Performance Specifications
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
V
IN
RECT input voltage range
4.0
10.0
V
I
AD_EN_sink
Sink current
1
mA
I
IN
Input current range
1.5
A
I
OUT
Output current range
Current limit programming range
1.5
A
V
OUT(REG)
Programmable output voltage
(1)
P
OUT
= 5 W
4.5
8
V
f
s
Switching frequency
WPC
110
205
kHz
T
J
Junction temperature
125
°C
(1)
The output voltage can be adjusted using V
OUT(REG)
resistors. Also the coil needs to change for different voltage for optimal
operation of the EVM.
3
SLUUB03 – April 2014
bq51020EVM (5-W WPC) Integrated Wireless Receiver Power Supply
Copyright © 2014, Texas Instruments Incorporated
