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ADBMS1818ASWAZ-R7 데이터시트(PDF) 1 Page - Analog Devices |
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ADBMS1818ASWAZ-R7 데이터시트(HTML) 1 Page - Analog Devices |
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1 / 92 page  Data Sheet ADBMS1818 18-Cell Battery Monitor with Daisy Chain Interface Rev. B DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. FEATURES ► Measures up to 18 battery cells in series ► 3 mV maximum total measurement error ► Stackable architecture for high voltage systems ► Built-in isoSPI interface ► 1 Mb isolated serial communications ► Uses a single twisted pair, up to 100 meters ► Low EMI susceptibility and emissions ► Bidirectional for broken wire protection ► 290 µs to measure all cells in a system ► Synchronized voltage and current measurement ► 16-bit Δ-Σ ADC with programmable third-order noise filter ► Passive cell balancing up to 200 mA (maximum) with program- mable pulse‑width modulation ► 9 general-purpose digital I/O or analog inputs ► Temperature or other sensor inputs ► Configurable as an I2C or SPI master ► 6 µA sleep mode supply current ► 64-lead LQFP_EP package APPLICATIONS ► Backup battery systems ► Grid energy storage ► Residential energy storage ► UPS ► High power portable equipment TYPICAL APPLICATION CIRCUIT Figure 1. Typical Application Circuit GENERAL DESCRIPTION The ADBMS18181 is a multicell battery stack monitor that meas- ures up to 18 series connected battery cells with a total measure- ment error (TME) of less than 3.0 mV. The cell measurement range of 0 V to 5 V makes the ADBMS1818 suitable for most battery chemistries. All 18 cells can be measured in 290 µs, and lower data acquisition rates can be selected for high noise reduction. Multiple ADBMS1818 devices can be connected in series, permit- ting simultaneous cell monitoring of long, high voltage battery strings. Each ADBMS1818 has an isoSPI™ interface for high speed, RF immune, long distance communications. Multiple devi- ces are connected in a daisy chain with one host processor connec- tion for all devices. This daisy chain can be operated bidirectionally, ensuring communication integrity, even in the event of a fault along the communication path. The ADBMS1818 can be powered directly from the battery stack or from an isolated supply. The ADBMS1818 includes passive balanc- ing for each cell, with individual pulse-width modulation (PWM) duty cycle control for each cell. Other features include an on-board 5 V regulator, nine general-purpose I/O lines, and a sleep mode, where current consumption is reduced to 6 µA. 1 Protected by U.S. patents, including 8,908,779; 9,182,428; and 9,270,133. |
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