KA35S280/281
Lead-Acid Battery Charger
Functional diagram:
KA35S28X Block Diagram
+
-
VLTF
TEMP
SW
-
-
IMax
+
VHTF
+
Reset
MS0
MS1
1
-
+
But. Press
Phase
Controller
Unit
En
+
-
5mV
2
3
Source Select:
0- Current
Comp.
1- Voltage
Cyc/Flt
-
A
B
4
10
+
4
5
A>B
LED0
LED1
LED2
LED3
VDD
1
0
Counter
Up
7
VFLT
VMin
VMax
VBLK
1
ADC
CNT
Down
Clk
4
50mV
0
MUX
MUX
6Hz
Osc.
Ref. Gen.
Comp.
4
A
B
A>B
A=B
90
4
5
0
MUX
0
IMin
VFLT
0
1
1
ICond
VMin
1
2
50mV
2
3
2
IMax
ITh
1
VMax
3
VBLK
MUX
MUX
Temp.
compensation
Temp.
compensation
3
ISNS
VBAT
VSS
Faster Charge
Figure 2 – KA35S28X Block Diagram
Functional description:
The KA35S28X functional operation is described in terms of:
Pin configuration
o Mode selection pins
o Faster Charge pin
o Cyclic/Float use pin
Fixed and Configurable Thresholds
Charge algorithms
o 3-Step voltage charge
o Current charge
o Pulsed-current charge
Temperature monitoring
o Temperature compensation
o Disabling Temperature Sensing
Charge monitoring
Fault detection
o Battery insertion and removal
o Shorted, opened, or damaged cells detections
2011 Nov 18
© 2011 Kasin Technology Inc.
4
KASIN [ Kasin Electronics Corporation ]
