costPowerDischargeTime

LIB > electronics > rlc > dischargetime-1 > costPowerDischargeTime

costPowerDischargeTime(C, Umax, Umin, P, ESR)

import electronics.rlc.dischargetime-1

Calculate the discharge time of a capacitor under constant power load.

import electronics.rlc.dischargetime-1;


costPowerDischargeTime(
	1.4F, // capacitance
	2V, // carged voltage
	1.0V, // discharged voltage
 50mA*3.3V, // used power
	1.5Ohm // ESR of the cap
)

C	The capacitance of the capacitor.
Umax	The carged voltage of the capacitor. Discharging beginns from here.
Umin	The discarged voltage of the capacitor. Discharging ends here (for example the buck-boost converter shuts down at this voltage level).
P	The loading power.
ESR	The equivalent series resistance of the capacitor. Optional. If not given, 0 is assumed.
return value	The discharge time of the capacitor.

This is the case for example when a buck-boost converter is running from the capacitor powering electronics that uses a constant power, for example 20mA at 3.3V.