LTC6803-2 and -4 - Multicell Battery Stack Monitor
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- Linear Technology
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Sugerowane produkty dla ltc68032
The LTC6803 is a 2nd generation, complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6803 can measure up to 12 series connected battery cells or supercapacitors. Many LTC6803 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6803-2/LTC6803-4 has an individually addressable serial interface, allowing up to 16 LTC6803-2/LTC6803-4 devices to interface to one control processor and operate simultaneously. Each cell input has an associated MOSFET switch for discharging overcharged cells. The LTC6803-2 connects the bottom of the stack to V– internally. It is pin compatible with the LTC6802-2, providing a drop-in upgrade. The LTC6803-4 separates the bottom of the stack from V–, improving cell 1 measurement accuracy.
The LTC6803 provides a standby mode to reduce supply current to 12μA. Furthermore, the LTC6803 can be powered from an isolated supply, providing a technique to reduce battery stack current draw to zero.
The related LTC6803-1 and LTC6803-3 offer a serial interface that allows the serial ports of multiple LTC6803-1 or LTC6803-3 devices to be daisy chained without optocouplers or isolators.
SPI Interface Isolated V- LTC6802 Pin Compatible LTC6803-1 Daisy Chain No Yes LTC6803-2 Addressable No Yes LTC6803-3 Daisy Chain Yes No LTC6803-4 Addressable Yes No
* Measures Up to 12 Battery Cells in Series * Stackable Architecture * Supports Multiple Battery Chemistries and Supercapacitors * Individually Addressable Serial Interface * 0.25% Maximum Total Measurement Error * Engineered for ISO26262 Compliant Systems * 13ms to Measure All Cells in a System * Passive Cell Balancing:
– Integrated Cell Balancing MOSFETs
– Ability to Drive External Balancing MOSFETs * Onboard Temperature Sensor and Thermistor Inputs * 1MHz Serial Interface with Packet Error Checking * Safe with Random Connection of Cells * Built-In Self Tests * Delta-Sigma Converter With Built-In Noise Filter * Open-Wire Connection Fault Detection * 12μA Standby Mode Supply Current * High EMI Immunity * 44-Lead SSOP Package
Designed for Automotive and Transportation Applications AEC-Q100 generic family data available for specific packages
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Produkt pochodzi z oferty sklepu Analog Devices