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Description
L9963E 鋰電池監控與保護晶片專為高可靠性車用與儲能系統設計，可支援最多 14 串電芯監控，滿足 48V 以上高壓系統需求；同時具備高精度電壓與電流量測（支援庫侖計算）並支援多顆 L9963E 串接（daisy chain），可透過變壓器隔離介面與主控 MCU 高速通訊，具備低 EMI、長距離、高可靠性等特性。L9963E 支援具可編程通道選擇的被動式電芯平衡功能，可在一般模式與低功耗模式（靜音平衡）下運作，並可透過內部定時器中斷自動終止平衡過程。晶片內建 9 組 GPIO，方便進行外部監控與控制。L9963E 亦具備完整的故障偵測與通報機制，滿足車規安全標準的要求。
All Features
- AEC-Q100 qualified
- Measures 4 to 14 cells in series, with 0 μs desynchronization delay between samples. Supports also busbar connection without altering cell results
- Coulomb counter supporting pack overcurrent detection in both ignition on and off states. Fully synchronized current and voltage samples
- 16-bit voltage ADC with maximum error of ±2 mV in the [0.5 – 4.3] V range, after soldering, in [-40; +105] °C Tj range
- 2.66 Mbps isolated serial communication with regenerative buffer, supporting dual access ring. Less than 4 us latency between start of conversion of the 1st and the 31st device in a chain. Less than 4 ms to convert and read 96 cells in a system using 8 L9963E and L9963T transceiver. Less than 8 ms to convert and read 210 cells in a system using 15 L9963E and L9963T transceiver. Less than 16 ms to convert and read 434 cells in a system using 31 L9963E and L9963T transceiver. Supports both XFMR and CAP based isolation
- 200 mA passive internal balancing current for each cell in both normal and silent-balancing mode. Possibility of executing cyclic wake up measurements. Manual/Timed balancing, on multiple channels simultaneously; Internal/External balancing
- Fully redundant cell measurement path, with ADC Swap, for enhanced safety and limp home functionality
- Intelligent diagnostic routine providing automatic failure validation. Redundant fault notification through both SPI Global Status Word (GSW) and dedicated FAULT line
- Two 5 V regulators supporting external load connection with 25 mA (VCOM) and 50 mA (VTREF) current capability
- 9 GPIOs, with up to 7 analog inputs for NTC sensing
- Robust hot-plug performance. No Zeners needed in parallel to each cell
- Full ISO26262 compliant, ASIL-D systems ready
*STMicroelectronics Authorized Distributor
