EUP9232

DS9232 Ver1.1 Feb. 2007

4

Application Circuit

Figure2.

Symbol

Parts

Purpose

Recommend

min.

max.

Remarks

FET1

Nch MOSFET

Discharge control









FET2

Nch MOS FET

Charge control









R1

Chip resistor

ESD protection

1k

Ω

300

Ω

1 k

Ω



C1

Chip capacitor

Filter

0.22

µF

0

µF

1

µF



R2

Chip resistor

ESD protection

1k

Ω

300

Ω

1 k

Ω



C2

Chip capacitor

Filter

0.22

µF

0

µF

1

µF



R4

Chip resistor

ESD protection

1 k

Ω

= R1 min.

= R1 max.

Same value as R1 and R2.

*1

C3

Chip capacitor

Delay time setting

0.22

µF

0

µF

1

µF

Attention should be paid to

leak current of C3.

*2

R3

Chip resistor

Protection for

charger

reverse

connection

1 k

Ω

300

Ω

5 k

Ω

Discharge can’t be stopped at

less than 300

Ω when a charger

is reverse-connected.

*3

*1

R4=R1 is required. Overcharge detection voltage increases by R4. For example 10 kΩ (R4) increases overcharge detection voltage

by 20 mV.

*2

*3

When the resistor R3 is set less than 300Ω and a charger is reverse-connected, current which exceeds the power dissipation of the

package will flow and the IC may break.

Caution

1.The above constants may be changed without notice.

2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of

connection. In addition, the example of connection shown above and the constant do not guarantee proper

operation. Perform through evaluation using the actual application to set the constant.