Meaning
Power allocation sheets for radio communication modules detail the maximum currents drawn during active radio frequency transmission. The transceiver pulse current is the highest instantaneous current required by a wireless transmitter during data packet transmission. This value must be accommodated by the system power supply to prevent failure.
Drain Magnitude
Transient currents in modern telemetry modules can easily exceed several hundred milliamps for tens of milliseconds. The transceiver pulse current must be supplied by the battery or a secondary storage device without causing the voltage of the supply rail to collapse. If the rail voltage falls too low, the microprocessor will halt.
This sudden failure is often caused by high internal resistance in the cell. Solid firmware design and hardware buffering are the primary defenses against these resets.
Buffer Capacity
Incorporating parallel capacitors helps protect the battery from high peak currents. Placing a capacitor near the radio frequency module reduces the transient load of the transceiver pulse current on the battery. This configuration helps avoid the voltage delay associated with cell passivation.
Hardware Lifetime
Continuous exposure to high peak currents accelerates battery aging and increases internal resistance. Minimizing the duration of the transceiver pulse current through firmware optimization helps preserve the total discharge capacity of the primary cell. Shorter transmit times reduce energy waste.
