EC9522T Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – LI-ION PROTECTION IC

LI-ION PROTECTION IC
EC9522T
Ver2.4 2004 / 05
Features
Low supply current
Supply current
TYP. 3.5uA
Standby current (after detecting over-discharge) TYP. 0.25uA
High accuracy detector
Over-charge detector(Topt=25ºC)
+/- 50mV
Threshold
Over-charge detector (Topt=0 to 50ºC)
+/- 60mV
Over-discharge detector
+/- 3.0%
Variety of detector threshold Over-charge detector threshold
4.0V to 4.4V step of 0.005V
Over-discharge detector threshold 2.0V to 3.0V step of 0.005V
Built in protection circuit
Excess current protection
0.04V to 0.32V step of 0.04V
Accuracy
±20%
Output delay of over charge Time delay at VDD=4.3V
1.2S ^note1
Output delay of over-discharg
VDD=2.4V with built-in capacitor
10mS
Small package
SOT23-6/6-pin
Note1: The result was measured from EC9522T0001
Part Number Examples
Part No.
Over charge detection
voltage
EC9522T003
…^*note2
4.30V
….
Note2: New model version and specific
characteristics may be order by customer.
Over charge release
voltage
4.10V
….
marking
E21-…
Pack type
SOT-23-6
….
General Description
The EC9522T is protection IC for over-charge/discharge of rechargeable one-cell
Lithium-ion(Li+) excess load current, further include a short circuit protector for preventing large
external short circuit current.
Each of these IC is composed of three voltage detectors, a reference unit, a delay circuit, a
short circuit protector, and a logic circuit. When charging voltage crosses the detector threshold
from a low value to value higher than VDET1, the output of Cout pin, the output of over-charge
detector/VD1, switches to low level, charger’s negative pin level. After detecting over-charge the
VD1 can be reset and the output of Cout becomes high when the VDD voltage is coming down to a
level lower than “VREL1”, or when a kind of loading is connected to VDD after a charger is
disconnected from the battery pack while the VDD level is in between “VDET1” and “VREL1” in
the EC9522T.
The output of Dout pin, the output of over-discharge detector/VD2, switches to low level after
internally fixed delay time passed, when discharging voltage crosses the detector threshold from a
high value lower than VDET2. After EC9522T detect the over-discharge voltage, connect a charger
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