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BCM4356XKUBGT Datasheet(PDF) 26 Page - Cypress Semiconductor

Part # BCM4356XKUBGT
Description  Single-Chip 5G WiFi IEEE 802.11ac 2횞2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1, FM Receiver, and Wireless Charging
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

BCM4356XKUBGT Datasheet(HTML) 26 Page - Cypress Semiconductor

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Wireless Charging
BCM4356 Advance Data Sheet
BROADCOM CONFIDENTIAL
Broadcom®
May 8, 2015 • 4356-DS103-R
Page 25
Wireless Charging
The BCM4356 combo IC is designed for paired operation with the BCM59350 wireless power transfer front-end
chip. Working together, the two chips form a power receiver unit (PRU) that is compliant with the Alliance for
Wireless Power specification (A4WP). High-level functional block diagram for wireless charging is provided in
Figure 4. The power transmit unit (PTU) resides in the charging pad while the power receive unit is integrated
into the mobile device. The charging process begins as the mobile device is placed onto the charging pad. The
power is transferred from PTU to PRU through the TX and RX coils by means of magnetic induction. The
Bluetooth control link handles communications, i.e., handshaking, between them. PTU is a BLE client, which
gets performance data from the BLE server (PRU) in order to adapt its power to the mobile's need.
Figure 4: High-Level Functional Block Diagram for Wireless Charging
Further details on the PRU are depicted in Figure 5 on page 26. It shows both ICs along with a power switch,
charger, power management IC, and the application processor (system).
Power Receiver Unit (PRU)
BCM59350
WPT
Front End
BCM4356
Bluetooth
Low-Energy (BLE)
WPT
Rx Coil
Resonator
System control i/f
WPT Control
Power Transmit Unit (PTU)
WPT
Transmit
BLE
WPT
Tx Coil
Resonator
Wireless Power
Transfer
USB
Power
Switch
VBUS Detect
Application
Processor
Bluetooth Control
Link
PMU
WPT 1.8/3.3
VBUCK
Charger
Battery
GPIO
System power
BT Antenna
BT Antenna


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