1、zmdi zssc1856智能電池檢測(cè)和管理解決方案zmdi公司的zssc1856是集成了的雙路高精度18位sigma-delta ,其中的一路輸入通過外接測(cè)量電池ibat(失調(diào)誤差小于10ma,辨別率優(yōu)于1ma),另一路測(cè)量電池vbat(輸入范圍4-28.8v,精度+/-2mv)和溫度,而集成的閃存則用來計(jì)算電池的狀態(tài).可編增益4-512,取樣速率1hz到16khz,主要用在汽車,工業(yè)和醫(yī)療領(lǐng)域.本文介紹了zssc1856主要特性和優(yōu)勢(shì),方框圖,基本應(yīng)用和典型應(yīng)用電路.the zssc1856 is a dual-channel adc with an embedded microcontr

2、oller for battery sensing/management in automotive, industrial, and medical systems.one of the two input channels measures the battery current ibat via the voltage drop at the external shunt resistor. the second channel measures the battery voltage vbat and the temperature. an integrated flash memor

3、y is provided for customer-specific soft-ware; e.g., dedicated algorithms for calculating the battery state.during sleep mode (e.g., engine off), the system makes periodic measurements to monitor the dis-charge of the battery. measurement cycles are controlled by the software and include various wak

4、e-up conditions. the zssc1856 is optimized for ultra-low power consumption and draws only 100a or less in this mode.the zssc1856 consists of two silicon dies in one package. the dies are assembled as stacked dies in a pqfn32 5x5mm package. the system basis chip (sbc) contains the high voltage circui

5、ts, the analog input stage including peripheral blocks, the -adcs, the digital filtering, and the lin-transceiver. the microcontroller chip (mcu) contains the microcontroller core, memories, and some peripheral blocks. communication between the mcu and the sbc is handled by an spi interface. interna

6、l nodes connecting the mcu and the sbc (i.e., txd, rxd, irqn, csn, spi_clk, mosi, miso, mcu_clk, mcu_rstn, and ram_protn) are controlled by firmware. users can access the internal nodes via the lin interface and/or external jtag pins (i.e., tdo, tdi, trstn, tms, and tck).zssc1856主要特性:high-precision

7、18-bit sigma-delta adc with on-chip voltage reference (5ppm/k)current channelibat offset error: 10maibat resolution: 1maprogrammable gain: 4 to 512differential input stage input range: ± 300mvsampling rate: 1hz to 16khzvoltage channelinput range: 4 to 28.8vvoltage accuracy: ± 2mvtemperatur

8、e channelinternal temperature sensor: ± 2external temperature sensor (ntc)on-chip precision oscillator (1%)on-chip low-power oscillator-m0* microcontroller: 32-bit core, 10mhz to 20mhz96kb flash/ee memory with ecc, 8kb sramlin2.1 / sae j2602-1 transceiverdirectly connected to 12v battery supply

9、current consumptionnormal mode: 10ma to 20malow-power mode: 100azssc1856優(yōu)勢(shì):integrated, precision measurement solution for accurate prediction of battery state of health (soh), state of charge (soc) or state of function (sof)flexible wake-up modes allow minimum power consumption without sacrificing p

10、erformanceno temperature calibration or external trimming components requiredoptimized code density through small instruction set architecture thumb -2 *robust por concept for harsh automotive environmentsindustrys smallest footprint allows minimal module size and costaec-q100 qualified solutionzssc1856應(yīng)用:intelligent battery sensing for automotive applications; e.g., start/stop systems, e-bikes, scooters, and e-cartsindustrial and medical applica-tions re