Quectel LTE OPEN EVB - Interface Applications; Power Interfaces

LTE Module Series
LTE OPEN EVB User Guide
LTE_OPEN_EVB_User_Guide 20 / 62
4 Interface Applications
This chapter describes the hardware interfaces of LTE OPEN EVB, shown as follows:
 Power interfaces
 LTE-QuecOpen TE-A interface
 Wi-Fi & Ethernet TE-A interface
 Micro-B USB interface
 Audio interfaces
 U(SIM) interfaces
 SD card interfaces & eMMC
 EEPROM
 SPI Flash
 UART interfaces
It also provides information about the buttons, switches, status indicators and test points to help
customers use the LTE OPEN EVB.
4.1. Power Interfaces (J0301/J0601)
The LTE OPEN EVB can be powered by an external power adapter through connecting with the power
jack (J0301) or Micro-USB receptacle (J0601) on the EVB. The power adapter connects to a step-down
converter which can provide the supply voltage (VBAT) required for operating the EVB and the module.
The following two figures show the simplified power supply schematic and the power interfaces of Quectel
LTE OPEN EVB.