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© 2017 ROHM Co., Ltd.
No. 60AP001E Rev.001
2017.4
© 2019 ROHM Co., Ltd.
No. 61UG042E Rev.001
JAN.2019
User
’s Guide
WPC Qi-compliant Wireless Power Series
NFC-compatible Wireless Power Transmitter
for Automotive Applications
BD57121MUF-M Evaluation Board
BD57121MUF-EVK-001
BD57121MUF-EVK-001 Evaluation Board is based on the BD57121MUF-M Automotive-grade wireless power transmitter IC. This board
integrates the ST25R3914 NFC reader/writer IC from ST Microelectronics to detect the presence of any NFC cards or tags and to prevent
damaging of the NFC antennae by the wireless power transfer system. Wireless power transfer is compliant with WPC Qi ver1.2.4 and can supply
power up to 15 W (output in receiver). Detection and identification of NFC Type A, B, F and V are possible.
Features
・
Compliance to WPC Qi ver1.2.4
・
Support of Multiple coils to increase charging area
(Qi MP-A13 coil type)
・
Power control using fixed frequency and variable voltage
・
NFC card / tag detection of Type A, B, F, V
・
Housing size: 120 mm x 65 mm x 30 mm
Figure 1. BD57121MUF-EVK-001 Evaluation Board
Performance specification
These are only representative values, and they do not represent guaranteed values of the product characteristics.
VIN = 12 V, unless otherwise specified.
Parameter
Min
Typ
Max
Units
Conditions
Input voltage
11.0
12.0
13.0
V
Output voltage
(receiver side)
-
12.0
-
V
Using BD57015GWL-EVK-002
Rx board
Output current
(receiver side)
0
-
1.25
A
Using BD57015GWL-EVK-002
Rx board
Dark current
-
0
5
μA
SW1=OFF
Operating frequency
(Wireless power)
-
127.8
-
kHz
