DS2720

DS2720 Efficient, Addressable Single-Cell Rechargeable Lithium Protection IC www.maxim-ic.com FEATURES § Rechargeable Lithium-Ion (Li+) Safety Circuit - Overvoltage Protection - Overcurrent/Short-Circuit Protection - Undervoltage Protection - Overtemperature Protection Controls High-Side N-Channel Power MOSFETs Driven from 9V Charge Pump System Power Management and Control Feature Support Eight Bytes of Lockable EEPROM Dallas 1-Wire® Interface with Unique 64-Bit Device Address 8-Pin mSOP Package Low Power Consumption: - Active Current: 12.5mA typ - Sleep Current: 1.5mA typ PIN CONFIGURATION PLS PS DQ VSS 1 2 3 4 8 7 6 5 CP DC CC VDD § § § § § § DS2720U mSOP PIN DESCRIPTION PLS PS DQ VSS VDD CP CC DC Battery-Pack Positive Terminal Input Power-Switch Sense Input Data Input/Output Device Ground Power-Supply Input Reservoir Capacitor Charge Control Output Discharge Control Output DESCRIPTION The DS2720 single-cell rechargeable Li+ protection IC provides electronic safety functions required for rechargeable Li+ applications including protecting the battery during charge, protection of the circuit from damage during periods of excess current flow and maximization of battery life by limiting the level of cell depletion. Protection is facilitated by electronically disconnecting the charge and discharge conduction path with switching devices such as low-cost N-channel power MOSFETs. Since the DS2720 provides high-side drive to external N-channel protection MOSFETs from a 9V char...