Datasheet

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1 Applications
The bq500212AEVM-550 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 A to operate and
combines the transmitter electronics, input power socket, 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:
• WPC 1.1 Foreign Object Detection (FOD) and WPC 1.0 Parasitic Metal Object Detection (PMOD)
• Dynamic Power Limiting™ (DPL) allows operation from a 5-V supply with limited current capability (for
example, a USB port)
• 5-V input power which is really available
• Transmitter-coil mounting pad providing the correct receiver interface
• Compact power section design using the CSD97376 NexFET power stage
• Standard WPC A11-type transmitter coil with no magnet
• LED indicates power transfer or power fault state
2 bq500212AEVM-550 Electrical Performance Specifications
Table 1 provides a summary of the EVM performance specifications. All specifications are given for an
ambient temperature of 25°C.
Table 1. bq500212AEVM-550 Electrical Performance Specifications
Parameter Notes and Conditions Min Typ Max Unit
Input Characteristics
V
IN
Input voltage 4.50 5.0 5.50 V
I
IN
Input current V
IN
= Nom, I
OUT
= Max 1.50 2.0 A
Input no-load current V
IN
= Nom, I
OUT
= 0 A 200 mA
Input stand-by current V
IN
= Nom 20 mA
Output Characteristics – Receiver bq51013BEVM-764
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
V
IN
= 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
ηpk Peak efficiency V
IN
= Nom, P Out RX = 2.5 W 72 %
η Full-load efficiency V
IN
= Nom, I
OUT
= Max 70 %
3 Modifications
See the datasheet (SLUSBD6) when changing components.
Use LED Mode – Resistor R23 to change the behavior of the status LED, D5, D7 and D9. The standard
value is 42.2 kΩ for control option 1, see the datasheet for additional settings.
NTC – Connector JP1 provides the option for connecting a negative temperature coefficient (NTC) sensor
for thermal protection, see the datasheet for additional settings.
L1 and L3 – Common Mode Choke for additional input power filtering or output TX Coil.
L1 – DLW5BTN101SQ2L – 6 A, 9 mΩ, muRata
L3 – DLW5BTN102SQ2L – 2 A, 24 mΩ, muRata
2
bq500212A bqTESLA Wireless Power TX EVM SLVU928A–September 2013–Revised October 2013
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