UB264A

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

9 of 10

www.unisonic.com.tw

QW-R502-832.A

(3) 2-serial cell

BAT1

BAT2

R2

R1

C1

C2

SENSE

VC1

VC2

VC3

CTL

CO

UTC

UB264A

Series

External

input

EB+

EB-

FET

SC Protector

Constants for External Components

NO.

PART

MIN

TYP

MAX

UNIT

1

R1 to R4

0.1

1

10

kΩ

2

0.01

0.1

1

μF

3

50

100

500

Ω

4

0

100

500

Ω

Notes:

1.

the examples of connection shown above and the constants will not guarantee successful operation.

Perform thorough evaluation using the actual application to set the constant.

2.

3.

4.

satisfied.

5.

In some application circuits, even if an overcharged battery is not included, the order of connecting

batteries may be restricted to prevent transient output of CO detection pulses when the batteries are

connected. Perform thorough evaluation with the actual application circuit.

6.

Since “H” may be output at CO transiently when the battery is being connected, connect the positive

terminal of BAT1 last in order to prevent the three terminal protection fuse from cutoff.

7.

8.

In the UTC UB264A Series, normally input “H” to the external input, and input “L” when setting CO to

“H”.