Product overview
Description
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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All features
- 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
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L99BM114
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L99BM114-TR | Active | TQFP 64 10x10x1.0 | Industrial | Ecopack2 | |
L99BM114-TR
Package:
TQFP 64 10x10x1.0Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||
| L99BM114-TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
L99BM114-TR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors