产品概要
描述
The L99BM114 is a Li-ion battery monitoring and protecting chip for high-reliability industrial applications and energy storage systems. Up to 14 stacked battery cells can be monitored to meet the requirements of 48 V and higher voltage systems.
Each cell voltage is measured with high accuracy, as well as the current for the on-chip coulomb counting. The device can monitor up to 7 NTCs. The information is transmitted through SPI communication or isolated interface.
Up to 31 L99BM114 can be connected in a daisy chain and communicate with one host processor via the transformer or capacitive isolated interfaces, featuring high-speed, low EMI, long distance, and reliable data transmission. Passive balancing with programmable channel selection is offered in both normal and low power mode (silent balance).
The balancing can be terminated automatically based on internal timer interrupt. Nine GPIOs are integrated for external monitoring and control, up to 7 of them can be configured for pack temperature monitoring via NTC. The L99BM114 features a comprehensive set of fault detection and notification functions to meet system safety standard requirements.
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性能一览
- 4 to 14 series cells battery monitoring and balancing
- 64 V operating voltage
- Supports busbar connection without altering cell results
- Independent 16-bit voltage ADC for each channel with accuracy less than 2 mV
- 18-bit ADC current measurement with coulomb counter
- Fully synchronized current and voltage samples
- Intelligent diagnostic routine providing automatic failure validation. Redundant fault notification through both SPI Global Status Word (GSW) and the dedicated FAULT line
- 9 GPIOs, with up to 7 analog inputs for NTC sensing
- Internal passive balancing up to 200 mA. Possibility to drive external balancing transistors
- 2.66 Mbps isolated serial communication or up to 5 MHz SPI
- Two 5 V regulators supporting external load connection with 25 mA (VCOM) and 50 mA (VTREF) current capability
- Embedded NVM for customer parameters storage
- System safety ready
- 64-pin TQFP package
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STMicroelectronics - L99BM114
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| L99BM114-TR | Active 产品已量产 | TQFP-EP 64 10x10x1.0 mm | Industrial | Ecopack2 | 10 | 2021-12-02T00:00:00.000+01:00 | |
L99BM114-TR
Package:
TQFP-EP 64 10x10x1.0 mmMaterial Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
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Sample & Buy
| Part Number | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| L99BM114-TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
L99BM114-TR Active