AIC1802 AIC [Analog Intergrations Corporation], AIC1802 Datasheet - Page 6

• Manufacturer Part Number: AIC1802
• Description: Two-Cell Lithium-Ion Battery Protection IC
• Manufacturer: AIC [Analog Intergrations Corporation]

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BLOCK DIAGRAM
PIN DESCRIPTIONS
PIN 1: OC
PIN 2: OD
PIN 3: TD
PIN 4: GND - Ground pin. This pin is to be
GND
VCC
OD
VC
- PMOS open drain output for
- Output pin for control of the
- Overdischarge delay time setting
control
MOSFET M2. When overcharge
occurs, this pin sources current to
switch the external NPN Q1 on,
and
turning off the charge control
MOSFET M2.
discharge control MOSFET M1.
When overdischarge occurs, this
pin goes low to turn off the
discharge control MOSFET M1
and discharging is inhibited.
pin.
connected to the negative terminal
of the lower battery cell.
2
8
4
6
charging
450
450
of
the
OVERCURRENT
DELAY CIRCUIT
is
charge
inhibited
OVERDISCHARGE
OVERDISCHARGE
OVERCHARGE
OVERCHARGE
DETECTOR 1
DETECTOR 1
UNBALANCE
DETECTOR 2
DISCHARGE
DETECTOR 2
control
OVERCURRENT
DETECTOR
by
PIN 5: TC
PIN 6: VC
PIN 7: CS
PIN 8: VCC - Power supply pin. It is to be
OVERDISCHARGE
DELAY CIRCUIT
OVERCHARGE
DELAY CIRCUIT
GENERATION
CONTROL
DETECTION
TIMING
LOGIC
CHARGE
POWER-
WAKE-
- Overcharge delay time setting
- To be connected to the positive
- Input pin for current sensing.
DOWN
UP
pin.
terminal of the lower cell and
the negative terminal of the
upper cell.
Using the drain-source voltage
of
MOSFET M1 (voltage between
CS
discharge current during normal
mode
charging
during power down mode.
connected
terminal of the upper cell.
the
and
and
VCC
current
discharge
GND),
to
detects
3
5
1
7
the
AIC1802
CS
TD
OC
is
TC
it
whether
present
positive
senses
control
6