Texas Instruments Evaluation Module for Qi-Compliant, Free-Positioning Wireless Power Transmitter Manager BQ500410AEVM-0 BQ500410AEVM-085 Datenbogen
Produktcode
BQ500410AEVM-085
Applications
1
Applications
The bq500410AEVM-085 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. All transmitter-side electronics and transmitter coils are on a single 4-layer printed
circuit board (PCB). The open design allows easy access to key points of the electrical schematic:
wireless power system. This transmitter EVM is a complete transmitter-side solution that powers a
bqTESLA™ receiver. All transmitter-side electronics and transmitter coils are on a single 4-layer printed
circuit board (PCB). The open design allows easy access to key points of the electrical schematic:
•
WPC certified transmitter
•
WPC A6-type transmitter coil, 70 mm × 25 mm free positioning area
•
Input voltage 12 V
•
Optional boost converter to allow operation from 5 V
•
Transmitter-coil mounting pad providing correct receiver interface
•
LED indicates power transfer or fault state, and buzzer indicates start of power transfer
2
bq500410AEVM-085 Electrical Performance Specifications
provides a summary of the bq500410AEVM-045 performance specifications. All specifications are
given for an ambient temperature of 25°C.
Table 1. bq500410AEVM-045 Electrical Performance Specifications
Parameter
Notes and Conditions
Min
Typ
Max
Unit
Input Characteristics
V
IN
Input voltage
0.6
12.0
0.6
V
I
IN
Input current
V
IN
= Nom, I
OUT
= 1 A at 5 V
570
mA
Input no-load current
V
IN
= Nom, I
OUT
= 0 A
75
mA
Input stand-by current
Vin = Nom
10
mA
Output Characteristics – Receiver bq51013AEVM-764, -765
V
OUT
Output voltage
V
IN
= Nom, I
OUT
= Nom
4.5
5
5.1
V
Output ripple
V
IN
= Nom, I
OUT
= Max
200
mV
PP
I
OUT
VIN = Min to Max
V
IN
= Min to Max
0
1
A
Output overcurrent
V
IN
= Nom
1
1.1
A
Systems Characteristics
F
S
Switching frequency
Switching frequency varies with load
110
205
kHz
η
pk
Peak efficiency
V
IN
= Nom, P Out RX = 2.5 W
74.2
%
η
Full-load efficiency
V
IN
= Nom, I
OUT
= Max
73.6
%
3
Modifications
See the data sheet (
) when changing components.
•
LED Mode--Resistor R39 can be used to change behavior of status LED D4. Standard value is 42.2
k
k
Ω
for control option 1, see data sheet for additional settings.
•
NTC--Connector J6 provides the option for connecting a negative temperature coefficient (NTC) sensor
for thermal protection, see data sheet for additional settings
for thermal protection, see data sheet for additional settings
•
PMOD--Resistor R40 is used to set the loss threshold, standard value is 56.2 k
Ω
. Removing jumper
JP1 disables PMOD. Resistor value can be changed to adjust the threshold, see data sheet for
additional settings.
additional settings.
2
bq500410A bqTESLA™ Wireless Power Transmitter EVM
SLVU688A – October 2012 – Revised December 2012
Copyright © 2012, Texas Instruments Incorporated