AIC1782
BLOCK DIAGRAM
GND VCC
TMR
LEB2 LEB1
LEA2
MODE
MODE
Selection
Bandgap
Reference
& Voltage
Regulator
Oscillator
Timing
Control Unit
Display
Control
Unit
LEA1
SEL3
Battery Voltage
& Temperature
Protection
Setting
LED Display&
Trickle Charge
Duty Setting
ICOB
SEL1
SEL2
Charge Control
State Machine
Charge
Control Unit
ICOA
ADJ
∆T/∆t
Detection
Setting
Battery Temperature
Protection
13-bit A/D
Battery Voltage
Protection
+
Discharge
Control Unit
DIS
DSW
-
CHARGE END
ATS
BTS
ABV
BBV
PIN DESCRIPTIONS
PIN 1: ABV - Divided battery voltage input to
sense the battery voltage of
pack A.
PIN 5: VCC
PIN 2: BBV - Divided battery voltage input to
sense the battery voltage of
pack B.
PIN 3: DIS
- Push-pull output, used to con-
trol an external transistor to dis-
charge the battery of pack B.
DIS is active high when function
of discharge is enabled.
PIN 7: SEL3
range of BTS pin is 0.29 V
CC
to
0.72 V
CC
.
- Power supply input at 5V
±
10%.
- For adjusting the slope of
∆
T /
∆
t . Acceptable voltage
range for this pin is approxi-
mately 0.28V to 3.8V. If volt-
age higher than VCC - 0.3V,
function of
∆
T /
∆
t detection is
disabled.
- Determining the acceptable
voltage range of ABV and
BBV pins and mode of tem-
perature protection function.
PIN 6: ADJ
PIN 4: BTS - The battery cell temperature of
pack B is represented as a volt-
age input to the AIC1782 at this
pin. The acceptable voltage
7
AIC [ ANALOG INTERGRATIONS CORPORATION ]
