DS2762 High-Precision Li+ Battery Monitor With Alerts www.maxim-ic.com GENERAL DESCRIPTION FEATURES Li+ Safety Circuit The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety- Overvoltage Protection protection device tailored for cost-sensitive battery Overcurrent/Short-Circuit Protection pack applications. This low-power device integrates Undervoltage Protection precise temperature, voltage, and current Host Alerted When Accumulated Current or measurement, nonvolatile (NV) data storage, and Li+ Temperature Exceeds User-Selectable Limits protection into the small footprint of either a TSSOP 0V Battery Recovery Charge package or flip-chip package. The DS2762 is a key Available in Two Configurations: component in applications including remaining Internal 25m Sense Resistor capacity estimation, safety monitoring, and battery- External User-Selectable Sense Resistor specific data storage. Current Measurement 12-Bit Bidirectional Measurement PIN CONFIGURATIONS Internal Sense Resistor Configuration: 0.625mA LSB and 1.9A Dynamic Range TOP VIEW External Sense Resistor Configuration: CC 1 1 16 V IN 15.625 V LSB and 64mV Dynamic Range PLS 2 2 15 V DD Current Accumulation: 3 DC 2 14 PIO Internal Sense Resistor: 0.25mAhr LSB SNS 4 13 V External Sense Resistor: 6.25 Vhr LSB SS SNS 5 12 V Voltage Measurement with 4.88mV Resolution SS SNS 6 11 V Temperature Measurement Using Integrated SS Sensor with 0.125C Resolution DQ 7 10 PS System Power Management and Control IS2 8 9 IS1 Feature Support TSSOP 32 Bytes of Lockable EEPROM 16 Bytes of General-Purpose SRAM 1 2 3 4 Dallas 1-Wire Interface with Unique 64-Bit Device Address A SNS Low-Power Consumption: B PLS DC DQ Active Current: 60 A typ, 90 A max C Sleep Current: 1 A typ, 2 A max SNS CC IS2 PROBE D APPLICATIONS V V SS IS1 IN PROBE PDAs E Cell Phones/Smartphones V PIO PS DD F Digital Cameras V SS FLIP CHIP ORDERING INFORMATION (top view bumps on bottom) PART TEMP RANGE PIN-PACKAGE DS2762BE+ -20C to +70C 16 TSSOP Selector Guide appears at end of data sheet, for additional 1-Wire is registered trademark of Dallas Semiconductor. options. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. 1 of 25 REV: 010906 DS2762 High-Precision Li+ Battery Monitor With Alerts ABSOLUTE MAXIMUM RATINGS -0.3V to +18V Voltage Range on PLS and CC Pin, Relative to V SS Voltage Range on PIO Pin, Relative to V -0.3V to +12V SS Voltage Range on Any Other Pin, Relative to V -0.3V to +6V SS Continuous Internal Sense Resistor Current 2.5A Pulsed Internal Sense Resistor Current 50A for <100s/s, <1000 pulses Operating Temperature Range -40C to +85C Storage Temperature Range -55C to +125C Soldering Temperature See IPC/JEDEC J-STD-020A Specification Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device. RECOMMENDED DC OPERATING CONDITIONS (2.5V V 5.5V, T = -20C to +70C.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 2.5 5.5 V DD Data Pin DQ (Note 1) -0.3 +5.5 V DC ELECTRICAL CHARACTERISTICS (2.5V V 5.5V, T = -20C to +70C.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Current I DQ = V , normal operation 60 90 A ACTIVE DD Sleep Mode Current I DQ = 0V, no activity, PS floating 1 2 SLEEP A Input Logic High: DQ, PIO V (Note 1) 1.5 V IH Input Logic High: PS V (Note 1) V - 0.2V V IH DD Input Logic Low: DQ, PIO V (Note 1) 0.4 V IL Input Logic Low: PS V (Note 1) 0.2 V IL I = -0.1mA (Note 1) V - 0.4V V Output Logic High: CC VOH OH PLS Output Logic High: DC V I = -0.1mA (Note 1) V - 0.4V V OH OH DD Output Logic Low: CC, DC V I = 0.1mA (Note 1) 0.4 V OL OL Output Logic Low: DQ, PIO V I = 4mA (Note 1) 0.4 V OL OL DQ Pulldown Current IPD 1 A Input Resistance: V R 5 M IN IN Internal Current-Sense Resistor R+25C 20 25 30 m SNS DQ Low to Sleep time t 2.1 s SLEEP 2 of 25