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EC9522T Dataheets PDF



Part Number EC9522T
Manufacturers E-CMOS
Logo E-CMOS
Description LI-ION PROTECTION IC
Datasheet EC9522T DatasheetEC9522T Datasheet (PDF)

www.DataSheet4U.com LI-ION PROTECTION IC EC9522T 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 Ove.

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www.DataSheet4U.com LI-ION PROTECTION IC EC9522T 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. 3.5uA TYP. 0.25uA +/- 50mV +/- 60mV +/- 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 10mS 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 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 Page 1 of 8 LI-ION PROTECTION IC EC9522T Ver2.4 2004 / 05 to the battery pack, and when the battery supply voltage becomes higher than the over-discharge detector threshold, VD2 is released and the voltage of Dout becomes “H” level. An excess load current can be sensed and cut off after internally fixed delay time passed through the built in excess current detector, VD3 with Dout being enabled to low level. Once after detecting excess current, the VD3 is released and Dout level switches to high by detaching a battery pack from a load system. Further, short circuit protector makes Dout level to low immediately with external short circuit current and re-moving external short circuit leads Dout level to high. After detecting over-discharge, supply current will be kept extremely low by halt some internal circuits operation. The output delay of over-charge detectors can be set by connecting external capacitors. Output type of Cout and Dout are CMOS. 6-pin, SOT23-6 is available. BLOCK DIAGRAM Page 2 of 8 LI-ION PROTECTION IC Pin Configurations EC9522T Ver2.4 2004 / 05 PIN DESCRIPTION Pin No. 1 2 3 4 5 6 Symbol Dout VCout Ct VDD Vss Pin description Output of over-discharge detection, CMOS output Pin for charge negative input Output of over-charge detection, CMOS output Pin for external capacitor setting output delay of VD1 Power supply Ground ABSOLUTE MAXIMUM RATINGS Symbol VDD VVct Vcout Vdout PD Topt Tstg Item Supply voltage Input voltage V- pin Ct pin Output voltage Cout pin Dout pin Power dissipation Operating temperature range Storage temperature range Ratings -0.3 to 20 VDD-20 to VDD+0.3 Vss-0.3 toVDD+0.3 VDD-20 to VDD+0.3 Vss-0.3 toVDD+0.3 150 -40 to85 -55 to 125 Vss=0V Unit V V V V V mW ºC ºC Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. Page 3 of 8 LI-ION PROTECTION IC ELECTRICAL CHARACTERISTIC EC9522T Ver2.4 2004 / 05 Temp=25ºC Symbol VDD1 VDET1 Item Operating input voltage Over-charge threshold Conditions Voltage defined as VDD-Vss Detect rising edge of supply 003 voltage -25ºC 0~50ºC *Note MIN. 1.5 4.250 4.240 4.05 0.8 2.425 2.813 7 0.1 0.12 9 VDD1.2 TYP. 4.300 4.300 4.10 1.2 2.500 2.900 10 0.12 0.14 13 VDD0.9 300 MAX. 10 4.350 4.360 4.15 1.5 2.575 2.987 13 0.14 0.16 17 VDD0.6 400 150 0.5 Unit V V V V S V V ms V V ms V us kOhm V V VREL1 Release voltage for over-charge detection 003 tVDET1 Output delay of over charge VDET2 tVDET2 VDET3 tV.


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