IP5389

V1.23

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12.11.1

Coulombmeter

IP5389 supports externally setting the initial capacity of the battery, and uses the integral of the current

and time of the battery terminal to manage the remaining capacity of the battery. When a 5 mohm detection

resistor is used between the battery current detection pins CSP2 and CSN2, the current battery capacity

can be accurately displayed. When the battery current detection pins CSP2 and CSN2 are shorted, the

battery current can be estimated to display the estimated current battery capacity; IP5389 supports the

automatic calibration of the total capacity of the current battery in a complete charging process from 0%

to 100%, and more reasonable management of the actual capacity of the battery.

The formula for setting the initial capacity of the battery through the IP5389 external pin: battery

capacity=R17*0.8 (mAH). The minimum value is 2000mAH, and the maximum value is 25000mAH.

When the voltage on the FCAP pin is less than 100mV or greater than 2700mV, it will be recognized

as a short-circuit or open-circuit abnormality in the R17 resistor.

Fcap

R17

17

Figure 10

Battery capacity configuration circuit

Typical battery capacity configuration table:

Table 13

Typical battery capacity configuration table

Note: The capacity in the table refers to the capacity of a single battery.

12.11.2

LED Power Display Mode

IP5389 4-LED mode to display the capacity of the battery is as follows:

R17 (ohm)

battery initial capacity (mAH)

6.2k

5000mAH

12.4k

10000mAH

18.7k

15000mAH

24.9k

20000mAH

30.9K

25000mAH