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AIC1802ACS Datasheet(PDF) 6 Page - Analog Intergrations Corporation |
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AIC1802ACS Datasheet(HTML) 6 Page - Analog Intergrations Corporation |
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6 / 10 page  AIC1802 6 n BLOCK DIAGRAM 5 3 7 1 6 8 2 4 VCC TC TD OC CS OD VC GND VCC 450 450 OVERCURRENT DELAY CIRCUIT OVERCURRENT DETECTOR CHARGE DETECTION OVERDISCHARGE DETECTOR 2 TIMING GENERATION OVERCHARGE DETECTOR 1 OVERCHARGE DELAY CIRCUIT OVERDISCHARGE DETECTOR 1 OVERDISCHARGE DELAY CIRCUIT OVERCHARGE DETECTOR 2 LOGIC CONTROL WAKE- UP POWER- DOWN UNBALANCE DISCHARGE n PIN DESCRIPTIONS PIN 1: OC - PMOS open drain output for control of the charge control MOSFET M2. When overcharge occurs, this pin sources current to switch the external NPN Q1 on, and charging is inhibited by turning off the charge control MOSFET M2. PIN 2: OD - Output pin for control of the discharge control MOSFET M1. When overdischarge occurs, this pin goes low to turn off the discharge control MOSFET M1 and discharging is inhibited. PIN 3: TD - Overdischarge delay time setting pin. PIN 4: GND - Ground pin. This pin is to be connected to the negative terminal of the lower battery cell. PIN 5: TC - Overcharge delay time setting pin. PIN 6: VC - To be connected to the positive terminal of the lower cell and the negative terminal of the upper cell. PIN 7: CS - Input pin for current sensing. Using the drain-source voltage of the discharge control MOSFET M1 (voltage between CS and GND), it senses discharge current during normal mode and detects whether charging current is present during power down mode. PIN 8: VCC - Power supply pin. It is to be connected to the positive terminal of the upper cell. |
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