DocID023052 Rev 2

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AN4085

Discharging the EFL700A39 battery

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3.3.1

Using EFL700A39 in stand-alone configuration

The EFL700A39 micro battery is able to withstand pulsed current discharges.

The Figure 7 shows a typical discharge curve for pulsed current discharge application with

following conditions applied on a stand-alone EFL700A39 battery:

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Figure 7. EFL700A39 typical pulsed discharge curve

3.3.2

Using a buffer capacitor to increase the pulse current

For applications in which pulsed current levels are higher than 10 mA and/or in which

operating temperature are lower than 30 °C, it is required to add a buffer capacitor in parallel

with the EFL700A39 as shown in the Figure 8.

Figure 8. Buffer capacitor connection scheme

The buffer capacitor aims are to keep the battery in a safe operating area, to stabilize the

output voltage supplied to the application and also to avoid triggering the battery voltage

sense and disconnection circuit. In order to choose the most adapted buffer capacitor, we