Technical Manual

Power Supply
Appendix A - 700/800 MHz Circuit Descriptions
A-16
ATLAS 4500 Multimode Station Technical Manual July 2021
A.5.2 Schematic Description
The OMAP operates all external interfaces and the three serial communication
devices. It also interfaces with the Controller board through a MCBSP BUS and
UART.
A.6 Power Supply
This section contains information on the following Power Supply components:
• Mains-to-48V PSU
• Filters
• Switch Mode DC-to-DC Convertors
A.6.1 General Description
The base station main power supply contains the following:
• 100 – 240 VAC-to-48 VDC supply
• Mains Filter, 48 V I/P and 3 O/P Filters.
• DC to DC 5.2 V PSU
• DC to DC 13.8 V PSU
• DC to DC 24 V PSU
• Cable and connector to main Controller PCB and PA.
• Shielded case
A.6.2 Schematic Description
A.6.2.1 Mains-to-48V PSU
The base station uses a switch mode power supply 100 – 240 VAC input, 48 V 10.5
A, 500 W output. This has a temperature controlled cooling fan inside.
A.6.2.2 Filters
The General power supply board has an EMI filter of the AC mains (inside PSU)
and filter networks on the 48 V DC O/P for ripple and RFI noise.