DS2762AE+025 Maxim Integrated Products, DS2762AE+025 Datasheet
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DS2762AE+025
Specifications of DS2762AE+025
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DS2762AE+025 Summary of contents
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GENERAL DESCRIPTION The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety- protection device tailored for cost-sensitive battery pack applications. This low-power device integrates precise temperature, voltage, measurement, nonvolatile (NV) data storage, and Li+ protection into the ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on PLS and CC Pin, Relative to V Voltage Range on PIO Pin, Relative to V Voltage Range on Any Other Pin, Relative to V Continuous Internal Sense Resistor Current Pulsed Internal Sense Resistor Current ...
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ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUITRY (2.5V £ V £ 5.5V 0°C to +50°C PARAMETER Overvoltage Detect Charge Enable Undervoltage Detect Overcurrent Detect Overcurrent Detect Short-Circuit Detect Short-Circuit Detect Overvoltage Delay Undervoltage Delay Overcurrent Delay Short-Circuit Delay Test ...
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ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT (2.5V £ V £ 5.5V -20°C to +50°C PARAMETER Temperature Resolution Temperature Full-Scale Magnitude Temperature Error Voltage Resolution Voltage Full-Scale Magnitude Voltage Offset Error Voltage Gain Error Current Resolution Current Full-Scale ...
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ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE (2.5V £ V £ 5.5V -20°C to +70°C PARAMETER Time Slot Recovery Time Write 0 Low Time Write 1 Low Time Read Data Valid Reset Time High Reset Time Low Presence Detect ...
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PIN DESCRIPTION PIN SYMBOL FLIP TSSOP CHIP PLS SNS IS2 9 D4 IS1 11, 12 ...
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Figure 1. Block Diagram 1-Wire DQ INTERFACE AND ADDRESS THERMAL SENSE V MUX IN + IS1 - IS2 PLS PS SNS IS2 DETAILED DESCRIPTION The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety-protection device tailored for cost-sensitive ...
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Figure 2. Application Example 102 x 2 PACK+ 1kW 150W 150W DATA 102 PACK- NOTE PRESENT FOR EXTERNAL SENSE RESISTOR SNS CONFIGURATIONS ONLY. NOTE PRESENT FOR INTERNAL SENSE RESISTOR SNS-INT CONFIGURATIONS ONLY. 1kW 1kW ...
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POWER MODES The DS2762 has two power modes: active and sleep. While in active mode, the DS2762 continually measures current, voltage, and temperature to provide data to the host system and to support current accumulation and Li+ safety monitoring. In ...
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The DS2762 provides a current-limited ( gently charge severely depleted cells. The recovery path is enabled when 0 £ reaches 3V (typ), the DS2762 returns to normal operation, awaiting connection of ...
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CURRENT MEASUREMENT In active mode, the DS2762 continually measures the current flow into and out of the battery by measuring the voltage drop across a current-sense resistor. The DS2762 is available in two configurations: 1) internal 25mW current-sense resistor and ...
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CURRENT OFFSET COMPENSATION Current measurement and current accumulation are internally compensated for offset on a continual basis minimizing error resulting from variations in device temperature and voltage. Additionally, a constant bias can be used to alter any other sources of ...
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PROGRAMMABLE I/O To use the PIO pin as described in this section, the IE bit (bit 2) of the Status Register must be set use the PIO pin as an output, write the desired output value to ...
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Temperature Interrupt High Threshold Temperature Alarm Low Threshold POWER SWITCH INPUT The DS2762 provides a power control function that uses the discharge protection FET to gate battery power to the system. The PS pin, internally pulled ...
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Table 2. Memory Map ADDRESS (HEX) 00 Protection Register 01 Status Register 02–06 Reserved 07 EEPROM Register 08 Special Feature Register 09–0B Reserved 0C Voltage Register MSB 0D Voltage Register LSB 0E Current Register MSB 0F Current Register LSB 10 ...
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OV—Overvoltage Flag. When set to 1, this bit indicates the battery pack has experienced an overvoltage condition. This bit must be reset by the host system. UV—Undervoltage Flag. When set to 1, this bit indicates the battery pack has experienced ...
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EEPROM REGISTER The format of the EEPROM register is shown in Figure 12. The function of each bit is described in detail in the following paragraphs. Figure 12. EEPROM Register Format BIT 7 BIT 6 EEC LOCK EEC—EEPROM Copy Flag. ...
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BUS SYSTEM The 1-Wire bus is a system that has a single bus master and one or more slaves. A multidrop bus is a 1-Wire bus with multiple slaves. A single-drop bus has only one slave device. In all ...
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HARDWARE CONFIGURATION Because the 1-Wire bus has only a single line important that each device on the bus be able to drive it at the appropriate time. To facilitate this, each device attached to the 1-Wire bus must ...
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NET ADDRESS COMMANDS Once the bus master has detected the presence of one or more slaves, it can issue one of the net address commands described in the following paragraphs. The name of each ROM command is followed by the ...
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Write Data [6Ch, XX]. This command writes data to the DS2762 starting at memory address XX. The LSb of the data to be stored at address XX can be written immediately after the MSb of address has been entered. Because ...
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Figure 17. Net Address Command Flow Chart 33h / 39h NO 55h READ MATCH YES MASTER Tx DS2762 Tx BIT 0 FAMILY CODE 1 BYTE DS2762 Tx SERIAL NUMBER 6 BYTES BIT 0 MATCH ? DS2762 Tx CRC 1 BYTE ...
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I/O SIGNALING The 1-Wire bus requires strict signaling protocols to ensure data integrity. The four protocols used by the DS2762 are as follows: the initialization sequence (reset pulse followed by presence pulse), write 0, write 1, and read data. The ...
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Figure 19. 1-Wire Write- and Read-Time Slots WRITE 0 SLOT t SLOT t LOW0 DQ DS2762 SAMPLE WINDOW MIN TYP 15ms 15ms READ 0 SLOT t SLOT DQ MASTER SAMPLE WINDOW t RDV LINE TYPE LEGEND: Figure 20. Swap Command ...
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