Wireless charging IC (WLC) 15-W transmitter for automotive
applications
Table of contents
Table of contents
General description ...........................................................................................................................1
Potential applications........................................................................................................................1
Features ...........................................................................................................................................1
Functional block diagram...................................................................................................................2
Logic block diagram....................................................................................................................................................2
Table of contents...............................................................................................................................3
1 Application diagram for 15W automotive transmitter solution with MP-A13 Tx coil ..............................5
2 Pin information ..............................................................................................................................6
3 Electrical specifications.................................................................................................................11
3.1 Absolute maximum ratings ..................................................................................................................................11
3.2 Device-level specifications ...................................................................................................................................14
3.3 DC specifications...................................................................................................................................................14
3.3.1 CPU .....................................................................................................................................................................14
3.3.2 GPIO....................................................................................................................................................................15
3.3.3 XRES and POR ....................................................................................................................................................17
3.4 Digital peripherals.................................................................................................................................................17
3.4.1 Inverter pulse-width modulation (PWM) for GPIO pins ...................................................................................17
3.4.2 I2C, UART, SWD interface, SPI, and LIN.............................................................................................................18
3.4.3 Memory...............................................................................................................................................................19
3.5 System resources..................................................................................................................................................19
3.5.1 Internal main oscillator clock............................................................................................................................19
3.5.2 ADC .....................................................................................................................................................................20
3.5.3 Current sense amplifier (CSA) / ASK amplifier (ASK_P and ASK_N) ................................................................20
3.5.4 VIN UV/OV ...........................................................................................................................................................21
3.5.5 Voltage regulation - VBRG .................................................................................................................................21
3.5.6 NFET gate driver specifications.........................................................................................................................22
3.5.7 BuckBoost PWM controller................................................................................................................................22
3.5.8 Thermal ..............................................................................................................................................................23
4 Functional overview .....................................................................................................................24
4.1 Wireless power transmitter ..................................................................................................................................24
4.2 WPC system control..............................................................................................................................................24
4.2.1 Coil selection and object detection phase .......................................................................................................25
4.2.2 Digital ping phase ..............................................................................................................................................25
4.2.3 Identification and configuration phase ............................................................................................................25
4.2.4 Negotiation ........................................................................................................................................................25
4.2.5 Calibration..........................................................................................................................................................25
4.2.6 Authentication ...................................................................................................................................................25
4.2.7 Renegotiation phase..........................................................................................................................................25
4.2.8 Power transfer phase.........................................................................................................................................26
4.2.9 Bidirectional in-band communication interface..............................................................................................26
4.3 Communication from Tx to Rx - FSK ....................................................................................................................26
4.4 Communication from Rx to Tx - ASK....................................................................................................................27
4.5 Demodulation .......................................................................................................................................................27
4.6 Inverter ..................................................................................................................................................................27
4.7 Rx detection ..........................................................................................................................................................28
4.7.1 Foreign object detection (FOD).........................................................................................................................29
4.7.2 Q factor FOD and resonance frequency FOD....................................................................................................29
4.7.3 Power loss FOD ..................................................................................................................................................29
4.7.4 Over temperature FOD ......................................................................................................................................29
4.8 BuckBoost regulator.............................................................................................................................................30
4.9 BuckBoost operating modes................................................................................................................................31
Datasheet
3
002-37268 Rev. *B
2023-07-21
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