Evb Components Application; Power Supply (J201/J502) - Quectel UMTS&LTE EVB R2.0 User Manual

4

EVB Components Application

This chapter mainly describes the following EVB components application:
⚫
Power supply
⚫
UMTS&LTE TE-A connector
⚫
USB connector
⚫
Audio connector
⚫
(U)SIM connector
⚫
SD card connector
⚫
UART connector
It also provides information about the buttons, switches, status indicators and test points to help
customers use the EVB.

4.1. Power Supply (J201/J502)

The UMTS&LTE EVB R2.0 can be powered by an external power adapter through connected with the
power jack (J201) or USB Type-C receptacle (J502) on the EVB. Please pay attention to the voltage value
of the power adapter, and 5V/2A is recommended. The power adapter is designed to be connected to a
step-down converter (U201), which can convert the supplied voltage into proper voltage (VBAT) for the
module.
The following two figures show the simplified power supply block diagram and the EVB power supply
interface.
J502
USB Type-C
interface
J201
Power
supply
UMTS&LTE_EVB_R2.0_User_Guide
U301
LDO
S201
U303
LDO
Power
U201
switch
TPS54319
Step-down converter
Figure 7: EVB Power Supply Block Diagram
UMTS&LTE EVB R2.0 User Guide
1.8V
Power supply for
Wi-Fi modules
3.3V 2.85V
U302
LDO
J103
VBAT
LTE-A Module Series
Power supply for
SD Card
Power supply for
the module
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