EC9522T Datasheet | E-CMOS

.. LI-ION PROTECTION IC Ver2.4 2004 / 05 Features Low supply current High accuracy detector Threshold Supply current Standby current (after detecting over-discharge) Over-charge detector(Topt=25ºC) Over-charge detector (Topt=0 to 50ºC) Over-discharge detector Variety of detector threshold Built in protection circuit Output delay of over charge Output delay of over-discharg Small package Note1: The result was measured from EC9522T0001 Over-charge detector threshold Over-discharge detector threshold Excess current protection Accuracy Time delay at VDD=4.3V VDD=2.4V with built-in capacitor TYP. 3.5u A TYP. 0.25u A +/- 50m V +/- 60m V +/- 3.0% 4.0V to 4.4V step of 0.005V 2.0V to 3.0V step of 0.005V 0.04V to 0.32V step of 0.04V ±20% 1.2S note1 10m S SOT23-6/6-pin Part Number Examples Part No. EC9522T003 …- note2 Over charge detection voltage 4.30V …. Over charge release voltage 4.10V …. marking E21-… Pack type SOT-23-6 …. Note2: New model version and specific characteristics may be order by customer. 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 posed 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 bees high when the VDD voltage is ing 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...