LM940 Hardware Design Guide
1VV0301352 Rev. 18 Page 26 of 75 2022-01-04
4. POWER SUPPLY
The power supply circuitry and board layout are very important parts of the full product
design, with critical impact on the overall product performance. Read the following
requirements and guidelines carefully to ensure a good and proper design.
Power Supply Requirements
The LM940 power requirements are as follows:
Maximum ripple on module input supply
Table 15: Power Supply Requirements
Power Consumption
Below table provides typical current consumption values of LM940 for various operation
modes.
No call connection
USB3.0 is connected to a host
LTE data call (CA_3A+7A+20A,
20MHz+20MHz+20MHz, Full RB, 256QAM DL /
64QAM UL, FDD 600Mbps DL / 75Mbps UL)
WCDMA voice call (Tx = 23 dBm)
WCDMA data call (DC-HSDPA up to 42 Mbps,
Max Throughput)
Note:
* Worst/best case current values depend on network configuration - not under module control.
** Applied MPR –2dB 16-QAM full RB
*** 3.3 voltage / room temperature
Table 16: LM940 Power Consumption
To Next Page
Loading...
Need help?
General
