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

s OPERATION TIMING CHART

1. Over-charge Detection Block and Cell Voltage Input Block

(1) When cell 3 does not exceed VTH and cells 1 and 2 are lowered in voltage by cell voltage input current

and self-discharging

If any cell voltage reaches or exceeds the over-charge detection voltage (4.325 V Typ), the COUT terminal (pin

2) goes “H” level to turn off the Pch MOS FET for external charge control, after a delay time (23 ms Typ) managed

by the capacitor (COVT) connected between the COVT terminal (pin 14) and GND, thereby stopping charging the

battery. At this time, the cell voltage input block switch is turned on to supply the cell voltage input current to that

cell so that high-voltage cells are lowered in voltage.

When all the cell voltages in the over-charge detected state become the over-charge release voltage (4.125 V

Typ) or less, the COVT terminal (pin 14) and COUT terminal (pin 2) go “L” level to turn on the Pch MOS FET for

external charge control.

When any cell voltage in the over-charge detected state becomes the over-charge release voltage (4.125 V Typ)

or less, the cell voltage input block switch is turned off.

Cell voltage

Cell 1

Cell voltage input

current

Cell 2

COVT terminal

VTH (4.325 V)

VH (0.2 V)

(4.125 V)

(45 µA)

(0 µA)

(45 µA)

(0 µA)

(6.26 V)

Cell 1

Cell 2

COUT terminal

tD (23 ms)

Figure 1

14

Share Link: