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AIC1821DCV Datasheet(PDF) 4 Page - Analog Intergrations Corporation |
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AIC1821DCV Datasheet(HTML) 4 Page - Analog Intergrations Corporation |
4 / 7 page AIC1821 ONE-CELL LITHIUM-ION BATTERY PROTECTION IC SPEC NO: DS-1821-P1 06/07/00 ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark,Hsinchu,Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 4 n BLOCK DIAGRAM Power-down Control Wake-up Control -0.3V 3 4 1 2 5 VCC Overdischarge Delay Circuit Overcharge Delay Circuit Overcurrent Delay Circuit Enable Enable Load Detected 0.3V 0.2V CS GND OC OD 1.2V 1V n PIN DESCRIPTIONS PIN 1: OC - PMOS open drain output for control of the charge control MOSFET M2. In normal mode, this PMOS turns on to pull the gate of the MOSFET M2 to high, then the MOSFET M2 turns on. When overcharge occurs, this PMOS turns off, then no current flows through R3 and the MOSFET M2 turns off. PIN 2: GND - Ground pin. This pin is to be connected to the negative terminal of the battery cell. PIN 3: OD - Output pin for control of the discharge control MOSFET M1. When overdischarge occurs, this pin goes low to turn off the MOSFET M1 and discharging is inhibited. PIN 4: CS - Input pin for current sensing. Using the sum of drain-source voltages of the MOSFET M1 and the MOSFET M2 (voltage between CS and GND), it senses discharge current during normal mode and detects whether charge current is present during power-down mode. It also used to detect whether load is connected during overcharge mode. PIN 5: VCC - Power supply pin. This pin is to be connected to the positive terminal of the battery cell. |
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