MB3836 データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

メーカー

MB3836

Li-Ion Battery Protection IC 3836

Fujitsu 

MB3836

5. Over-current Detection Block 2

When a discharge current is relatively large as an over-current, if the potential difference between the VCC

terminal and OCV terminal (pin 1) by RON of the Pch MOS FET for external charge control becomes 300 mV

or more, the capacitor (COCT) connected between the COCT terminal (pin 13) and GND is charged. No over-

current is detected if the OCV terminal voltage returns to the battery voltage level within the delay time (7 ms

Typ). If the potential difference between the VCC terminal and OCV terminal (pin 1) of the Pch MOS FET for

external charge control becomes 600 mV or more, an over-current is detected after a delay time (500 ms Typ)

managed by the capacitor (COCT) connected between the COCT terminal (pin 13) and GND. At this time, the

DOUT terminal (pin 3) goes “H” level to turn off the Pch MOS FET for external discharge control, both of the VS

terminal (pin 5) and OCV terminal (pin 1) go “L” level, and the bias source in the IC is completely turned off as well.

Recharging can be restarted by setting the OCV terminal (pin 1) to “H” level to set the DOUT terminal (pin 3) to

“L” level and VS terminal (pin 5) to “H” level, respectively.

OCV terminal

COCT terminal

(VCC)

VTH (VCC - 0.3 V)

VTH (VCC - 0.6 V)

0V

(5.8 V)

DOUT terminal

VS terminal

0V

↓Charge start

tD (500 µs)

Figure 7

Internal bias : Off

21

Share Link: