4-to-14-series-cell battery-monitoring AFE with parallel cell-voltage conversion, shunt-current ADC, passive balancing, isolated daisy chain and SPI
Power & Energy · Multicell battery monitoring and balancing IC
L99BM114-TR
A battery-monitoring IC relevant to robot pack design whose public datasheet quantifies ADC, balancing and communication boundaries, while the cited humanoid transient article does not release raw traces or a complete test method.
STMicroelectronics L99BM114 · Also: L99BM114
What this record can support today.
Coverage is computed from published, non-unknown fields. It measures the record—not product quality—and makes missing procurement evidence explicit.
Engineering field coverage55%
6 of 11 selected fields published
- Official product sourcepublished
- Lifecycle statepublished
- Mechanical dimensions / mass / mountingmissing
- Environmental operating limitspublished
- Capacity / energymissing
- Voltage boundarypublished
- Continuous / pulse currentpublished
- Cycle-life conditionmissing
- Charging requirementsmissing
- Connector / contact definitionmissing
- Protection / BMS boundarypublished
Procurement field coverage15%
2 of 13 selected fields published
- Official product / sales routepublished
- Lifecycle statepublished
- Exact orderable SKU / part numbermissing
- Price with region, currency and quantitymissing
- Lead time with check datemissing
- Commercial availability / stock statemissing
- Minimum order quantitymissing
- Authorized distributor / sales channelmissing
- CAD / STEP / interface drawingmissing
- Certification with identifiermissing
- MTBF / failure / reliability datamissing
- Warranty termsmissing
- PCN / EOL / replacement noticemissing
Coverage measures whether a selected public field is present with non-U evidence. It is not a product score, compatibility result, certification, availability confirmation or procurement recommendation. Download the complete readiness coverage JSON →
Reported values, conditions attached.
Evidence state describes the claim—not the prestige of the company or document.
| Claim | Reported value | Condition / boundary | State | Source |
|---|---|---|---|---|
| Series cells monitoredcell_count | 4–14 cells | One L99BM114 device. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Maximum battery stack voltagestack_voltage | 64 V | Datasheet headline operating boundary; circuit design must retain pin-level limits. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Cell-voltage measurement rangecell_voltage_input_range | 0.1–5.0 V | Electrical-characteristics boundary for VCELL. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Cell-voltage ADC resolutioncell_voltage_resolution | 89 µV | Datasheet design-information value; the table marks this entry as not tested. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Cell-voltage accuracy plus driftcell_voltage_accuracy | ±2 mV | VCELL 3.2–4.3 V and ambient −40 to +105°C; retain all datasheet test and supply conditions. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Current ADCcurrent_adc | 18-bit differential ADC; ±150 mV input range | Shunt-based current channel; application current depends on the selected shunt and system design. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Illustrative current rangecurrent_range_application | ±1500 A | Datasheet application example with a 0.1 mΩ shunt; marked application-only and not tested.This is not an independently verified robot-pack current rating. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Current-input errorcurrent_error | ±0.3 mV within ±60 mV; ±0.5% outside to ±150 mV | Electrical-characteristics table; use the exact differential-input interval and test conditions. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Voltage/current synchronization behaviorsynchronized_sampling | Voltage conversion waits for a useful current sample; synchronized sample stored in CUR_INST_Synch | On-demand acquisition; the wait can extend to TCYCLEADC_CUR.Synchronization does not establish zero end-to-end system latency. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Current conversion timecurrent_conversion_time | 328.25 µs typ. | Datasheet design-information value; marked not tested. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Internal passive-balancing currentbalance_current | Up to 200 mA/cell | Maximum is bounded by junction temperature and external thermal design. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| External temperature inputstemperature_inputs | Up to 7 NTC inputs | Manufacturer product/datasheet feature. | M · Manufacturer claimed | STMicroelectronics L99BM114 product page ↗Product status, key features, ordering information and evaluation ecosystem · Observed 2026-08-10 Checked 2026-08-10 |
| Communication interfacescommunication | 2.66 Mbit/s isolated daisy chain; SPI up to 5 MHz | Interface headline values; physical isolation parts, topology and protocol timing remain system-level work. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Maximum daisy-chain lengthdaisy_chain | 31 devices | Manufacturer-published device-count boundary. | M · Manufacturer claimed | STMicroelectronics L99BM114 product page ↗Product status, key features, ordering information and evaluation ecosystem · Observed 2026-08-10 Checked 2026-08-10 |
| Operating ambient temperatureoperating_temperature | −40 to +105 °C | Datasheet operating range; thermal and accuracy conditions still apply. | M · Manufacturer claimed | L99BM114 multicell battery monitoring and balancing IC datasheet ↗DS14722 Rev 1: features, absolute/operating limits, electrical characteristics and ADC operation · DS14722 Rev 1 · July 2024 · 159 pages Checked 2026-08-10 |
| Package / order codepackage | TQFP-EP64 10 × 10 × 1.0 mm; L99BM114-TR | Product ordering and package information. | M · Manufacturer claimed | STMicroelectronics L99BM114 product page ↗Product status, key features, ordering information and evaluation ecosystem · Observed 2026-08-10 Checked 2026-08-10 |
| Public raw transient tracespublic_raw_transient_traces | Not published in cited public evidence | RCI checked the cited public product, datasheet and manufacturer-authored article surfaces on the verification date.The article shows two plotted examples but does not link downloadable time-series traces. | U · Unknown | Battery Management Accuracy Strengthens Humanoid Robot Reliability ↗Manufacturer-authored article and two plotted transient examples · Published by Power Systems Design; authors affiliated with STMicroelectronics Checked 2026-08-10 |
| Complete public transient-test methodtransient_test_method | Not published in cited public evidence | RCI checked the cited public product, datasheet and manufacturer-authored article surfaces on the verification date.The article names laboratory-grade active-load equipment but does not publish its make/model, calibration record, acquisition sample rate, filter configuration or a numeric error metric. | U · Unknown | Battery Management Accuracy Strengthens Humanoid Robot Reliability ↗Manufacturer-authored article and two plotted transient examples · Published by Power Systems Design; authors affiliated with STMicroelectronics Checked 2026-08-10 |
| Independent robot-pack validationindependent_robot_validation | Not published in cited public evidence | RCI checked the cited public product, datasheet and manufacturer-authored article surfaces on the verification date.The cited transient examples are manufacturer-authored and do not constitute an independent exact-pack or operating-humanoid validation. | U · Unknown | Battery Management Accuracy Strengthens Humanoid Robot Reliability ↗Manufacturer-authored article and two plotted transient examples · Published by Power Systems Design; authors affiliated with STMicroelectronics Checked 2026-08-10 |
Known limits
What this record does not prove.
- This record is an integrated circuit, not a complete robot battery pack or BMS.
- The ±1500 A figure is an application-only datasheet illustration tied to a 0.1 mΩ shunt and is explicitly marked not tested.
- The manufacturer-authored article provides two plots but no public raw traces, instrument identity, calibration, acquisition rate or numeric transient-error metric.
- An article-level statement of no observable latency must not override datasheet conversion, synchronization-delay and filter-window boundaries.