aoz9004d Alpha & Omega Semiconductor, aoz9004d Datasheet - Page 9

• Manufacturer Part Number: aoz9004d
• Description: Single-cell Battery Protection Ic
• Manufacturer: Alpha & Omega Semiconductor

by connecting the charger. The resistance (R
between the V
discharge over-current detection status.
When a battery is in the normal status, and the discharge
current becomes abnormally higher (EB+ pin and EB- pin
shorted), and thus the V
than load short-circuiting detection voltage (V
load short-circuiting detection delay time (t
IC turns off the discharge control MOSFET and stops
discharging. This status is the load shorting-circuiting
status. In the load shorting-circuiting status, the V
and V
and V
condition is released, the V
potential. The resistance (R
V
status.
Charge Over-Current Status
When a battery in the normal status is in the status, and
the charge current is higher than the specified value and
the status lasts for the charge over-current detection
delay time (t
off and charging is stopped. This status is the charge
over-current status. This IC will be restored to the normal
status from the charge over-current status when, the
voltage at the V
detection voltage (V
charger. The charge over-current detection function does
not work in the over-discharge status. The resistance
(R
resistance (R
not connected in the charge over-current status.
DD
Rev. 1.0 October 2006
VMD
pin is not connected in the load shorting-circuiting
SS
SS
) between the V
pin are shorted by the resistor between V
pin (R
CIOV
VMS
M
VMS
M
pin and V
), the charge control MOSFET is turned
) between the V
pin returns to charge over-current
) in the IC. When the short-circuiting
CIOV
M
M
pin and V
) or higher by removing the
DD
pin voltage is equal or higher
M
VMD
pin is not connected in the
pin returns to the V
) between the V
M
DD
pin and V
pin, and the
SHORT
SS
VMD
SHORT
M
pin are
SS
)
), the
pin and
M
M
www.aosmd.com
pin
) for
pin
0V Battery Charging Function “Available”
This function is used to recharge a connected battery
whose voltage is 0V due to self-discharge. When the 0V
battery charge starting charger voltage (V
higher voltage is applied between the EB+ and EB- pins
by connecting a charger, the charging control MOSFET
gate is fixed to the V
When the voltage between the gate and source of the
charging control MOSFET becomes equal to or higher
than the turn-on voltage due to the charger voltage, the
charging control MOSFET is turned on to start charging.
At this time, the discharging control MOSFET is off and
the charging current flows through the internal parasitic
diode in the discharging control MOSFET. When the
battery voltage becomes equal to or higher than over-
discharge release voltage (V
the normal status.
0V Battery Charging Function “Unavailable”
This function inhibits recharging when a battery that is
internally short-circuited (0V battery) is connected. When
the battery voltage is the 0V battery charge inhibition
battery voltage (V
MOSFET gate is fixed to the EB- pin voltage to inhibit
charging. When the battery voltage is the 0V battery
charge inhibition battery voltage (V
charging can be performed.
0INH
DD
) or lower, the charging control
pin voltage.
DU
), the AOZ9004D enters
0INH
) or higher,
AOZ9004D
0CHA
Page 9 of 16
) or a