STBC21 datasheet(19/54 Pages) STMICROELECTRONICS

19 / 54 page

STBC21

Detailed description

Doc ID 023256 Rev 1

19/54

Figure 7.

V-I characteristics

Figure 8.

Battery temperature alarm after charging starts (at battery insertion and

at recharge) flowchart

AM10418v1

Charging

current ( mA

Battery voltage (V)

3 V

ISET1

(Pr e -char ge cur r ent value)

ISET2

(Fast-

char ge cur r ent value)

CV- 1/2/3/4

4.05V

+ 0.03V/ - 0.06

CV- 1/2/3/4

4. 10 V + 0.03V/ - 0.06

CV- 1/2/3/4

4. 20 V + 0.03V/ - 0.06

CV- 1/2/3/4

4.05V

+ 0.03V/ - 0.03

CV- 1/2/3/4

4. 10 V + 0.03V/ - 0.03

CV- 1/2/3/4

4. 20 V + 0.03V/ - 0.03

)

0.03V/ - 0.06

+/ - 0.03

AM10419v 1

Ba ery Temperature

Alarm Detec on / A er

charging starts

Baery Temperature

> 45°C

Baery Temperature

< 0°C

Start charging

Baery Temperature

Alarm occurrence

Charging doesn’t start

Ba ery Temp Alarm /

A er charging starts

LED SET

Charge on going

LED SET

YES

0°C < Baery Temperature < 43°C

Start charging

Charge on going

LED SET

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