KA35S280 데이터 시트보기 (PDF) - Kasin Electronics Corporation

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KA35S280

Lead-Acid Battery Charger

Kasin Electronics Corporation 

KA35S280/281

Lead-Acid Battery Charger

- Charge monitoring

Charge status (figure 10) is annunciated by the LED driver outputs LED1 - LED3 (figure 11)

2.6 Voltage Profile for

Lead-Acid Charging with

Constant Current Regulation

2.5

2.4

2.3

2.2

2.1

2.0

Charge Rate = C/20

1.9

0

25 50

75 100 125 150

Previous Discharge Capacity Returned, %

Figure 10 - Voltage Roll-Off In Constant Current Charging Profile

LED0

R

LED0

LED1

R

LED1

LED2

R

LED2

R

LED3

LED3

KA35S28X

Figure 11 – LED Display

- Fault detection

- Battery insertion and removal

The KA35S28X uses VBAT to detect the presence or absence of a battery. The KA35S28X

determines that a battery is present when VBAT is between the High-Voltage Cutoff and the

Low-Voltage Cutoff. When VBAT is outside this range, the KA35S28X determines that no

battery is present and transitions to the Fault state. Also, sudden changes in battery voltage

can cause the fault state.

- Shorted, opened, or damaged cells detections

The KA35S28X can be detect shorted, opened, and damaged cells by using one of the

following below state:

1. High current detection

2. Non-rechargeable batteries detection

3. Changing in any of the buttons

2011 Nov 18

© 2011 Kasin Technology Inc.

10

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