Pin Functions

No. 5640-4/6

LA5621M, 5621V

Pin No.

Pin name

Function

LA5621M

LA5621V

1

1

BIAS1

Resistor connection pin for setting non-reversed input potential of comparator 1

22

Reversed input of comparator 1 (for charge current detection)

33

Non-reversed input of comparator 1 (for charge current detection)

4

4

CPU

Microcontroller signal input pin

5

5

BIAS2

Resistor connection pin for setting non-reversed input potential of comparator 2

66

Reversed input of comparator 2 (for countercurrent detection when 2 batteries are used)

77

Non-reversed input of comparator 2 (for countercurrent detection when 2 batteries are used)

—

8

NC

No connection

—

9

NC

No connection

8

10

GND

Substrate of this IC (Lowest potential)

9

11

CHARGE

Charging signal input pin, charge with low

10

12

CHARGE INH

Charge prohibition signal input pin, charge prohibition with low (becomes low during discharge mode

for lithium-ion battery that set operates on)

11

13

BATT/EXT

On/off control pin of this IC, except Gate block (becomes "Open" during discharge mode for

lithium-ion battery that set operates on)

12

14

Power supply input

13

15

GATE

Gate connection pin of external power MOSFETs

14

16

Lithium-ion battery + side input pin

Specified Test Circuit

Note: * If negative voltage is applied due to countercurrent, etc., up to 1.5 mA can be allowed.

Operating temperature, Ta — °C