ZMDI ZSSC1856智能电池检测和管理解决方案

1、zmdi zssc1856智能电池检测和管理解决方案zmdi公司的zssc1856是集成了的双路高精度18位sigma-delta ,其中的一路输入通过外接测量电池ibat(失调误差小于10ma,辨别率优于1ma),另一路测量电池vbat(输入范围4-28.8v,精度+/-2mv)和温度,而集成的闪存则用来计算电池的状态.可编增益4-512,取样速率1hz到16khz,主要用在汽车,工业和医疗领域.本文介绍了zssc1856主要特性和优势,方框图,基本应用和典型应用电路.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优势: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应用:intelligent battery sensing for automotive applications; e.g., start/stop systems, e-bikes, scooters, and e-cartsindustrial and medical applica-tions re