SC121NGTR

SC121 LI+ BATTERY PROTECTION CIRCUIT DESCRIPTION SC121 is a LI+ battery protection circuit. It is suitable for protecting LI+ battery against damage from over charge, over discharge, and over current. It contains high accurate voltage detection and delay circuits. FEATURES * Low supply current * Over-charge detect 4.28V, Over-charge release 4.10V. * Over-discharge detect 2.50V, Over-discharge release 2.90V. * Over-current detect 0.15V, Short Current detect 1.00V. * Overcharge/over-discharge/over-current detection delay * Charger detection * Reset resistance for over current protection * Wide supply voltage range * Small package APPLICATIONS * Protection IC for One-Cell LI+ Battery Pack ORDERING INFORMATION Part No. SC121NTR SC121NATR SC121NGTR SC121NAGTR Package 121N SOT-23-6 Marking 121NA 121NG 121NAG Material Pb free Pb free Halogen free Halogen free Package Type Tape & Reel Tape & Reel Tape & Reel Tape & Reel HANGZHOU MICROELECTRONICS CO.,LTD Http:// www.silan.com.cn REV:1.6 2009.07.20 Page 1 of 9 SC121 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATING Characteristics Supply Voltage OC Output Pin Voltage OD Output Pin Voltage CSI Input Pin Voltage Operating Temperature Range Storage Temperature Range Symbol VDD VOC VOD VCSI TOPR TSTG Value VSS-0.3 ~ VSS+12 VDD-15 ~ VDD+0.3 VSS-0.3 ~ VDD+0.3 VDD-15 ~ VDD+0.3 -40 ~ + 85 -40 ~ +125 Unit V V V V °C °C ELECTRICAL CHARACTERISTICS (Tamb=25°C, unless otherwise specified) Characteristics Operating Voltage Operating Voltage Current Consumption Supply Current Power Down Current Detection Voltage Over Charge Detection Voltage Over Charge Release Voltage Over Discharge Detection Voltage Over Discharge Release Voltage VOCU VOCR VODL VODR 4.24 4.05 2.40 2.80 4.28 4.10 2.50 2.90 4.32 4.15 2.60 3.00 V V V V IDD IPD VDD=3.9V VDD=2.0V 3.0 0.3 6.0 0.6 µA µA VDD 1.8 8.0 V Symbol Status Min. Typ. Max. Unit HANGZHOU MICROELECTRONICS CO.,LTD Http:// www.silan.com.cn REV:1.6 2009.07.20 Page 2 of 9 SC121 Characteristics Over Current 1 Detection Voltage Over Current 2(Short Current)Detection Voltage Over Current Reset Resistor Charger Detection Voltage Delay Time Over Charge Detection Delay Time Over Discharge Detection Delay Time Over Current 1 Detection Delay Time Over Current 2(Short Current)Detection Delay Time Other OC Pin Output “ Voltage H” OC Pin Output “ Voltage L” OD Pin Output “ Voltage H” OD Pin Output “ Voltage L” 0 V battery charge starting charger voltage PIN CONFIGURATION Voh1 Vol1 Voh2 Vol2 VOCHA SC121NA 1.55 VDD-0.1 VDD-0.02 0.01 VDD-0.1 VDD-0.02 0.01 0.1 0.1 V V V V V TOC TOD TOI1 TOI2 VDD=3.6V~4.4V VDD=3.6V~2.0V VDD=3.6V VDD=3.6V 150 80 5 340 200 13 5 500 300 20 50 ms ms ms µs Symbol VOI1 VOI2 Rshort VCH VDD=3.6V VDD=3.6V Status Min. 0.13 0.80 400 -0.8 Typ. 0.15 1.00 500 -0.5 Max. 0.17 1.20 600 -0.2 Unit V V kΩ V PIN DESCRIPTIONS PIN No. 1 2 3 4 5 6 Symbol OD CSI OC TD VDD VSS I/O O I/O O I I I Description FET gate connection pin for discharge control. Input pin for current sense, charger detect. FET gate connection pin for charge control. Test pin for reduce delay time. Positive power input pin. Negative power input pin. HANGZHOU MICROELECTRONICS CO.,LTD Http:// www.silan.com.cn REV:1.6 2009.07.20 Page 3 of 9 SC121 FUNCTION DESCRIPTIONS Normal Status If VODL