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ACEDW01 Folha de dados(PDF) 4 Page - ACE Technology Co., LTD.

Nome de Peças ACEDW01
Descrição Electrónicos  One Cell Lithium-ion/Polymer Battery Protection IC
Download  19 Pages
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Fabricante Electrônico  ACE [ACE Technology Co., LTD.]
Página de início  http://www.ace-ele.com
Logo ACE - ACE Technology Co., LTD.

ACEDW01 Folha de dados(HTML) 4 Page - ACE Technology Co., LTD.

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ACEDW01
One Cell Lithium-ion/Polymer Battery Protection IC
VER 1.2
4
Overdischarge Status
1. Products with Power-down Function
When the battery voltage falls below than the overdischarge detection voltage (VODR) during
discharging in the normal status and the detection continues longer than the overdischarge detection
delay time (TOD), the ACEDW01 series will turn the discharging control MOSFET off(OD pin) so as to
stop discharging. This condition is called the overdischarge status.
When the MOSFET is off, CS pin voltage is pulled up by the resistor to VCC in the IC, at this time; the
power consumption is reduced to the lowest. This condition is called the “SLEEP MODE”.
The overdischarge status will be released by two cases:
A. When CS pin voltage is equal to or lower than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge detection voltage (VODR).
B. When CS pin voltage is equal to or higher than the charge overcurrent detection voltage (VCIP)
by charging and the VCC pin voltage is higher than the overdischarge release voltage (VODR).
2. Products with Auto Overdischarge Recovery Function
When the battery voltage falls below than the overdischarge detection voltage (VODP) during
discharging in the normal status and the detection continues longer than the overdischarge detection
delay time (TOD), the ACEDW01 series will turn the discharging control MOSFET off(OD pin) so as to
stop discharging. This condition is called the overdischarge status.
The overdischarge status will be released by three cases:
A. When CS pin voltage is equal to or lower than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge detection voltage (VODP).
B. When CS pin voltage is equal to or higher than the charge overcurrent detection voltage (VCIP)
by charging and the VCC pin voltage is higher than the overdischarge release voltage (VODR).
C. Without connecting a charger, if the VCC pin voltage is higher than overdischarge release voltage
(VODR), the overdischarge status will be released, namely Auto Overdischarge Recovery
Function.
Overcurrent Protection
In normal mode, the ACEDW01 continuously monitors the discharge current by sensing the voltage of
CS pin. If the voltage of CS pin exceeds the overcurrent protection voltage (VOI1) beyond the overcurrent
delay time (TOI1) period, the overcurrent protection circuit operates and discharging is inhibited by
turning off the discharge control MOSFET. The overcurrent condition returns to the normal mode when
the load is released or the impedance between BATT+ and BATT – is larger than 500KΩ. The
ACEDW01 provides two overcurrent detection levels (0.15V and 1.35V) with two overcurrent delay time
(TOI1 and TOI2) corresponding to each overcurrent diction level.
Charge Detection after Overdischarge
When overdischarge occurs, the discharge control MOSFET turns off and discharging is inhibited.
However, charging is still permitted through the parasitic diode of MOSFET. Once the charger is
connected to the battery pack, the ACEDW01 immediately turns on all the timing generation and
detection circuitry. Charging progress is sensed if the voltage between CS and GND is below charge
detection threshold voltage (VCH).


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