User's Manual

○ Meet the WPC QI standard
○ Support foreign body detection
○ RoHS compliance
IV. FUNCTION SPECIFICATIONS
Wireless Charging
Rated power
15W
Frequency band(kHz)
120~130
Modulation
ASK
Antenna type
Coil Antenna
NFC
Frequency band(MHz)
13.56MHz
Modulation
ASK
Antenna type
Coil Antenna
The wireless charging input terminal VCC is connected to the 18V direct current. After
the voltage is lowered by the BUCK circuit constituted by MOS tube Q1(RU30J30) and L3, it
works in the full bridge circuit constituted by Q2(RU30J30) and Q3(RU30J30).The IC(CPS8100)
sends a drive signal to control the Q2(RU30J30) upper and Q3(RU30J30) lower tubes and
Q2(RU30J30) lower tubes and Q3(RU30J30) upper tubes to conduct alternately, so that an
alternating voltage is obtained on the coil!Then through the electromagnetic induction to the
receiving coil to get the voltage!The IC(CPS8100) detects current through resistor R9!
NFC Introduction
The FM17550 is a highly integrated Transceiver IC for Contactless communication at
13.56MHz. The FM17550 Transceiver IC support Reader/Writer mode supporting ISO/IEC
14443A/B protocal.
The FM17550’s internal transmitter part is able to drive a reader/writer antenna designed to
communicate with ISO/IEC14443A/B cards and transponders without additional active
circuitry. The receiver part provides a robust and efficient implementation of a demodulation
and decoding circuitry for signals from ISO/IEC14443A/B compatible cards and
transponders. The digital part handles the complete ISO/IEC 14443A/B framing and error
detection. The FM17550 supports ISO/IEC14443A cards and transponders with transfer
speeds from 106kbit/s to 424kbit/s in both directions. And can supports all layers of the
ISO/IEC14443B reader/writer communication scheme, and provided that stardardized
protocols, e.g. like ISO/IEC 14443-4 and/or ISO/IEC 14443B anticollision are correctly
implemented.