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KA35S280-DI Scheda tecnica(PDF) 7 Page - Kasin Electronics Corporation

Il numero della parte KA35S280-DI
Spiegazioni elettronici  Lead-Acid Battery Charger
PDF  19 Pages
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Produttore elettronici  KASIN [Kasin Electronics Corporation]
Homepage  http://www.kasincorp.com
Logo KASIN - Kasin Electronics Corporation

KA35S280-DI Scheda tecnica(HTML) 7 Page - Kasin Electronics Corporation

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KA35S280/281
Lead-Acid Battery Charger
2011 Nov 18
© 2011
Kasin Technology Inc.
7
- Charge algorithms
- 3-Step voltage charge
This algorithm consists of four phases (figure 4):
1.
Phase1 - Qualification: The charging current is limited at ICOND (=IMAX/5) until the cell
voltage rises to VTH to prevent battery damage. In this condition The KA35S28X enters
the Charge Pending state and waits until the battery voltage rises to VTH. Charge
Pending is annunciated by LED0 and LED3 flashing.
2.
Phase2 - Fast Charge 1: The charging current is limited at IMAX (1.25 IMAX when faster
pin is 0) until the cell voltage rises to VBLK.
3.
Phase3 - Fast Charge 2: The charging voltage is regulated at VBLK until the charging
current drops below IMIN ( 0.1IMAX)
4.
Phase4 - Maintenance: The charging voltage is regulated at VFLT.
V
BLK
V
FLT
V
TH
Time
I
MAX
I
COND
I
MIN
I
FLT
Phase 1
Phase 2
Phase 3
Phase 4
Fast Charge
Maintenance
Voltage
Current
Figure 4
– 3-Step Voltage Charge
- Current charge
This algorithm consists of three phases (figure 5):
1.
Phase1 - Qualification: The charging current is limited at ICOND (=IMAX/5) until the cell
voltage rises to VTH to prevent battery damage. In this condition The KA35S28X enters
the Charge Pending state and waits until the battery voltage rises to VTH. Charge
Pending is annunciated by LED0 and LED3 flashing.
2.
Phase 2 - Fast Charge: The charging current is regulated at IMAX (1.25 IMAX when faster
pin is 0) until the cell voltage rises to VBLK or the “Second Difference” of cell voltage
drops below -8mV while VBAT is over 2.0V.
3.
Phase3 - Maintenance: Fixed-width pulses of charging current = ICOND are modulated in
frequency to achieve an average value of IMIN (0.1IMAX).
V
BLK
V
FLT
V
TH
Time
I
MAX
I
COND
I
MIN
I
FLT
Phase 1
Phase 2
Phase 3
Fast Charge
Maintenance
Voltage
Current
Figure 5
– Current Charge



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