Wireless charging IC (WLC) 15-W transmitter for automotive
applications
Pin information
Table 1
Pin#
WLC1515 pinouts (continued)
WLC1515
Example pin assignment
Description
Pin name
for 15W 3-Coil
MP-A13 transmitter
Bootstrap power supply for (inverter bank 2) inverter high-side gate
driver. Connect a capacitor (recommended value 0.1µF) from this pin
to SW2_1. Also, connect a Schottky diode from VDDD to BST2_1.
43
BST2_1
High-side gate driver for inverter FET (inverter bank 2). Connect to the
Inverter bank 2, high-side FET gate. Use a wide trace to minimize
inductance of this connection.
Inverter switching node for inverter bank 2. Connect this pin to the
inverter bank 2 switching node with a short and wide trace.
Inverter input voltage sense. Connect to inverter input voltage, after
the current sense resistor. Use a dedicated (Kelvin) trace for this
connection.
44
45
46
HG2_1
SW2_1
VBB_1
Low-side gate driver for inverter FET (inverter bank 2). Connect to the
inverter bank 2 low side FET gate.
Connect to VDDD pin. Connect bypass capacitors (recommended
values 1µF and 0.1µF) as close to the IC as possible.
Ground for inverter gate driver. Connect directly to PCB ground plane
and EPAD. Connect all GND and PGND pins together.
Low-side gate driver for inverter FET (inverter bank 1). Connect to the
inverter bank 1 Low side FET gate.
Inverter switching node for inverter bank 1. Connect this pin to the
Inverter bank 1 switching node with a short and wide trace.
High-side gate driver for inverter FET (inverter bank 1). Connect to the
inverter bank 1 high side FET gate.
47
48
49
50
51
52
LG2_1
PVDD_1
PGND_1
LG1_1
SW1_1
HG1_1
Bootstrap power supply for (inverter bank 1) inverter high-side gate
driver. Connect a capacitor (recommended values 0.1µF) from this
pin to SW1_1. Also, connect a Schottky diode from VDDD to BST1_1.
53
BST1_1
Negative input of input current sense amplifier for inverter. Float this
pin if it is not used.
54
55
CSNI_1
CSPI_1
DNU1
DNU2
Positive input of input current sense amplifier for inverter. Float this
pin if it is not used.
2
Used for interfacing as Master, with OPTIGA™ Trust I C SDA or With
OPTIGA™ Trust SPI MISO. The pin is configured for open drain
connection, connect an external pull-up resistor. Float this pin if it is
not used.
56
57
GPIO9
SDA_SEC / SPI_MISO
SCL_SEC /SPI_CLK
2
Used for interfacing with OPTIGA™ Trust I C SCL or With OPTIGA™
GPIO10
Trust SPI CLK. The pin is configured for open drain connection,
connect an external pull-up resistor. Float this pin if it is not used.
RESET for OPTIGA™ Trust IC (I2C Version) / MOSI for OPTIGA™ Trust IC
Chip select for OPTIGA™ TRUST IC(SPI Version)/ Configurable GPIO.
Configured for using OPTIGA™ Trust in low power mode. Configu-
rable GPIO.
58
59
GPIO11
GPIO12
RES_SEC/SPI_MOSI
SPI_SS
Tx coil 2 temperature measurement via thermistor monitoring for
15W MP-A13 application/External Clock / configurable GPIO. Float
this pin if it is not used.
4.5V–24V input supply. Connect a decoupling capacitor (recom-
mended value 0.1µF) from this pin to GND close to this pin.
1.8V LDO output for Arm®-M0 power and 1.8V references. Connect a
decoupling capacitor (recommended value 0.1µF) from this pin to
ground. Not for external use or loading.
60
61
62
GPIO13
TEMP_FB_2/CLK_IN
VIN
VCCD
VDDD 5V LDO output from VIN. Connect a ceramic bypass capacitor
(recommended value 1µF) from this pin to GND close to the IC.
Connect all VDDD pins together.
63
VDDD
Datasheet
8
002-37268 Rev. *B
2023-07-21
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