Mobile Phone Xolo Mirage Plus (Smartphone)
Service Manual
Page
9
of 40
3.3 RF Chip WCN3620 device introduction
The WCN3620 IC integrates three different wireless connectivity technologies into a single
device suitable for handsets and other mobile devices:
Wireless local area network (WLAN) compliant with the IEEE 802.11 b/g/n
specification
Bluetooth (BT) compliant with the BT specification version 4.0 (BR/EDR+BLE)
Worldwide FM radio, with Rx modes supporting the Radio Data System (RDS) for
Europe and the Radio Broadcast Data System (RBDS) for the USA
The WCN3620 is a highly integrated IC using the 3.32 × 3.55 × 0.63 mm, 61-pin wafer-level
nanoscale package (61 WLNSP) – and is supplemented by modem IC processing (such as the
MSM8x26 IC, a device in the MSM™ chipset family) to create a wireless connectivity
solution that reduces the part count and PCB area. The WCN3620 IC ensures hardware and
software compatibility with companion Qualcomm Atheros (QCA) chipsets to simplify the
design cycle and reduce the OEM time-to-market cycle.
The WCN3620 IC uses low-power 65 nm RF CMOS fabrication technology, making it
perfectly suited for battery-operated devices where power consumption and performance are
critical.
The WCN3620 device’s major functional blocks are:
A single-band WLAN RF
BT radio (RF and digital processing)
FM radio (RF and digital processing)
Shared WLAN + BT RF front-end (RF FE) circuits
Top-level support circuits that interface with the modem IC, buffer the XO input,
generate the wireless connectivity network (WCN) internal clocks, and gate and
distribute DC power to the other blocks
New features introduced into the WCN3620 IC
65 nm RF CMOS technology in the small 61 WLNSP
Highly integrated front-end eliminates external PA and LNA matching, and antenna
Tx/Rx switching.
Support for ANT
Support for the IEEE802.11b/g/n standard
Single-band WLAN: 2.4 GHz RF transceivers
Compliant with BT specification version 4.0
Concurrent WLAN + BT reception in the 2.4 GHz band
Lower power consumption
Smaller IC footprint, lower parts count, and less PCB area overall
