ds2760bx-025-t-r Maxim Integrated Products, Inc., ds2760bx-025-t-r Datasheet
ds2760bx-025-t-r
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ds2760bx-025-t-r Summary of contents
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FEATURES § Li+ safety circuit - Overvoltage protection - Overcurrent/short circuit protection - Undervoltage protection § Zero Volt Battery Recovery Charge § Available in two configurations: - Internal 25mW sense resistor - External user-selectable sense resistor § Current measurement ...
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... DS2760AE+025/T&R 2760A25 DS2760BE+025/T&R 2760B25 DS2760AX DS2760A DS2760BX DS2760B DS2760AX-025 DS2760AR Flipchip, 25mW Sense Resistor, Tape & Reel, 4.275V Vov DS2760BX-025 DS2760BR Flipchip, 25mW Sense Resistor, Tape & Reel, 4.35V Vov DS2760AE DS2760A DS2760BE DS2760B DS2760AE/T&R DS2760A DS2760 BE/T&R ...
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BLOCK DIAGRAM Figure 1 DQ INTERFACE THERMAL SENSE VIN + IS1 - IS2 PLS PS SNS 1-WIRE AND ADDRESS VOLTAGE REFERENCE MUX ADC internal sense resistor configuration only 25mW IS2 IS1 3 REGISTERS AND USER MEMORY LOCKABLE EEPROM SRAM TEMPERATURE ...
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DETAILED PIN DESCRIPTION Table 1 SYMBOL TSSOP* FLIP CHIP PIO PLS VIN 11,12,13 F3 VSS SNS 4,5,6 A3 ...
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APPLICATION EXAMPLE Figure 2 PACK+ DATA 102 PACK- 1 – present for external sense resistor configurations only SENS 2 – present for internal sense resistor configurations only SENSINT 102 DS2760 CC VIN ...
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POWER MODES The DS2760 has two power modes: Active and Sleep. While in Active Mode, the DS2760 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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FET back on (unless another protection condition prevents it). Discharging remains enabled during overvoltage. Undervoltage. If the voltage of the cell drops below undervoltage threshold V undervoltage delay t , the DS2760 shuts off the charge and discharge FETs, ...
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Summary. All of the protection conditions described above are OR’ed together to affect the outputs. = (Undervoltage) or (Overcurrent, EITHER Direction) or (Short Circuit (Protection Register bit (Sleep Mode) = (Overvoltage) or (Undervoltage) or ...
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DS2760 maintains the Current Accumulator in units of Volt-hours, with a resolution of 6.25 mVhrs and a full scale range of ±205 mVhrs. The Current Accumulator is a read/write register that can be altered by the host system ...
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TEMPERATURE MEASUREMENT The DS2760 uses an integrated temperature sensor to continually measure battery temperature. Temperature measurements are placed in the Temperature Register in two’s-complement format with a resolution of 0.125°C over a range of ±127°C. The Temperature Register format is ...
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MEMORY MAP Table 3 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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COC – Charge Overcurrent Flag. When set to 1, this bit indicates the battery pack has experienced a charge-direction overcurrent condition. This bit must be reset by the host system. DOC – Discharge Overcurrent Flag. When set to 1, this ...
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EEPROM REGISTER The format of the EEPROM Register is shown in Figure 11. The function of each bit is described in detail in the following paragraphs. EEPROM REGISTER FORMAT Figure 11 bit 7 bit 6 EEC LOCK EEC – EEPROM ...
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BUS SYSTEM The 1-Wire bus is a system which 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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CRC GENERATION BLOCK DIAGRAM Figure 14 MSb 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, ...
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All transactions of the 1-Wire bus begin with an initialization sequence consisting of a Reset Pulse transmitted by the bus master followed by a presence pulse simultaneously transmitted by the DS2760 and any other slaves on the bus. The presence ...
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FUNCTION COMMANDS After successfully completing one of the Net Address Commands, the bus master can access the features of the DS2760 with any of the Function Commands described in the following paragraphs. The name of each function is followed by ...
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FUNCTION COMMANDS Table 4 Command Description Reads data from memory Read Data starting at address XX Write Data Writes data to memory starting at address XX Copy Data Copies shadow RAM data to EEPROM block containing address XX Recall Data ...
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NET ADDRESS COMMAND FLOW CHART Figure 16 33h / 39h NO 55h READ MATCH YES YES DS2760 Tx MASTER Tx BIT 0 FAMILY CODE 1 BYTE DS2760 Tx SERIAL NUMBER 6 BYTES BIT 0 MATCH ? DS2760 Tx CRC 1 ...
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I/O SIGNALING The 1-Wire bus requires strict signaling protocols to insure data integrity. The four protocols used by the DS2760 are: the initialization sequence (Reset Pulse followed by Presence Pulse), Write 0, Write 1, and Read Data. All of these ...
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WRITE AND READ TIME SLOTS Figure 18 WRITE 0 SLOT DS2760 Sample Window MIN 15ms 15ms READ 0 SLOT t SLOT DQ Master Sample Window t RDV LINE TYPE LEGEND: SWAP COMMAND TIMING Figure 19 DQ ...
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ABSOLUTE MAXIMUM RATINGS* Voltage on PLS and CC pin, Relative to VSS Voltage on PIO pin, Relative to VSS Voltage on VIN and PS , Relative to VSS Voltage on any other pin, Relative to VSS Continuous Internal Sense Resistor ...
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ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUITRY 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 Threshold Test Current Recovery Charge Current SYMBOL MIN TYP ...
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ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT 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 Magnitude Current Offset Error Current Gain Error Accumulated Current ...
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ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE PARAMETER Time Slot Recovery Time Write 0 Low Time Write 1 Low Time Read Data Valid Reset Time High Reset Time Low Presence Detect High Presence Detect Low SWAP timing pulse width SWAP timing pulse falling ...