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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ZSSC1750 데이터시트(PDF) 21 Page - Renesas Technology Corp |
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ZSSC1750 데이터시트(HTML) 21 Page - Renesas Technology Corp |
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21 / 117 page  ZSSC1750 / ZSSC1751 Datasheet © 2016 Integrated Device Technology, Inc. 21 April 20, 2016 2 Circuit Description 2.1 Overview The ZSSC1750/51 is a data acquisition System Basis Chip (SBC) assembled in a PQFN36 6x6mm package. It contains a high voltage circuit, analog input stage including peripheral blocks, sigma-delta ( ΣΔ) ADCs (SD_ADC), digital filtering, and a LIN transceiver (for ZSSC1750 only). Communication between an external microcontroller and the SBC is handled by a Serial Peripheral Interface (SPI). The functions of the ZSSC1750/51 are controlled by register settings. The circuit starts after power-on with default register and calibration settings that can be overwritten by the user’s software. One input channel measures IBAT via the voltage drop at the external shunt resistor. The second channel measures VBAT and the temperature. By simultaneously measuring VBAT and IBAT, it is possible to dynamically determine Rdi, which is correlated with the state of health (SOH) of the battery. By integrating IBAT, it is possible to determine the state of charge (SOC) of the battery. These are the fundamental parameters for an intelligent battery sensor. The necessary microcontroller and the software for determining these parameters is not part of the ZSSC1750/51. Figure 2.1 Functional Block Diagram MCU_CLK IRQN VDDP VDDC ZSSC1750/51 Analog Front End SBC Common Ground PGA MUX VBAT LIN VDDP_REG BG_REF WD_TIMER VDDC_REG OSC GP_TIMER LP_REG VDDA_REG DIGITAL FILTER CONFIG REGISTER RESULT REGISTER DIGITAL FILTER CALIBRATION DATA PATH SHUNT + – BATTERY SD_ADC SD_ADC RREF NTC LIN_PHYS (1) RXD TXD CSN SCLK MISO MOSI VDDE VDDA INP INN VBAT NTH LIN Analog Block Digital Block SBC_PMU MCU_RSTN SLEEPN IRQ_CTRL SPI WDT_DIS 1) Available in ZSSC1750 only. NTL During the Standby Mode and the system’s Sleep Mode (e.g., engine is off), the system periodically measures the values to monitor the discharge of the battery (see section 3.7 regarding modes). Measurement cycles are controlled by the user’s software and are dependent on the detected events. The ZSSC1750/51 is designed for low current consumption during Sleep Mode in the range of less than 60µA. |
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