製品概要
概要
The L9988 is a multicell battery stack monitor that measures up to 4 series-connected battery cells with a total measurement error of less than 2 mV. The IC has one battery stack current measurement channel, which can support synchronous current and voltage measurement, performing coulomb counting for SoC estimation. The L9988 includes both timed and PWM-based odd-even passive balancing for each cell. 4 analog inputs for external NTC thermistor connection and 2 general-purpose I/O are available. The L9988 can be powered directly from the battery stack. Programmable voltage regulators can supply all the system components, including the MCU, CAN and NTCs. The IC also integrates a dual pre-driver for driving 2 independent groups of circuit breaker (CB) back-to-back MOSFETs to manage battery pack connection. IC configuration and information exchange with the MCU is performed via 4 MHz, 40-bit SPI. Relevant configurations stored in the internal NVM allow quick wakeup without reprogramming the IC. The L9988 has dedicated alert output pins to indicate fault state, which makes the system more robust. A comprehensive set of safety mechanisms has been implemented to achieve up to ASIL-D targets.
-
特徴
- AEC-Q100 grade 1 qualified
- [4V÷28V] Powersupplyoperating range
- Voltagemeasurement:
- 15-bit Sigma Delta ADC with programmable filter time with cut-off down to 30 Hz
- Measures 4 single cell voltage, with over/under voltage detection and balance timeout protection
- Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells
- Full 0÷5 V measurement range, with total error < ±2 mV in the [1.8 V÷4.5 V] range with -40°C ≤ TJ ≤ +105°C
- Currentmeasurement:
- 20-bit Current Sense ADC for battery current measurement (range ± 1500A), with overcurrent protection
Total error < 0.23% for ±200A, considering 100 µΩ RSHUNT typical value (no spread contribution) - 20-bit Coulomb Counting ADC for SoC estimation
Total error < 3.9% for ±100 mA in STANDBY MODE, considering 100 µΩ RSHUNT typical value (no spread contribution) Total error < 0.7% for ±50A in NORMAL MODE, considering 100 µΩ RSHUNT typical value (no spread contribution) - Continuously short-circuit detection
- 20-bit Current Sense ADC for battery current measurement (range ± 1500A), with overcurrent protection
- Passivecellbalancing:Max 200mA, supporting time-continuous and PWM modes, with synchronized odd-even channelsbalance
- 4 analog inputs measurepacktemperaturevia NTCs, with OT/UT detection; 2 GPIOs are available
- Ultra-low power consumption of 190µA in STANDBY MODE and 50µA in SLEEP MODE
- Integrated PMIC with configurable regulators:
- Boost pre-regulator to support system full operation at low battery level
- VCORE regulator for MCU supply [1.125 V÷5 V]
- VCC regulator for MCU ADCs supply [3.3 V/5 V]
- Fixed 5 V regulator for external CAN power supply
- VSTBY regulator for external RTC supply [3.3 V/5 V]
- Fixed 5 V VTREF regulator to bias external NTCs
- Integrated dualhigh-sideVGS pre-driver:
- Drive 2 independent groups back-to-back MOSFETs
- Switch OFF MOSFETs in case of SC during NORMAL and STANDBY MODE.
- Standard 4-wire, 4MHz, 40-bit SPI interface for device configuration and diagnostics dataread-out
- Watchdogs: Configurable double watchdog (Q&A WD andtime windowed WD)
- Real-timeclock:Selectabletimer from 1s to 180 days
- Configurable wakeup monitoring OV/UV/OT/OVC/SC
- Hardware wakeup module: IGNleveltriggeredand WAKEedgetriggered
- Embedded NVM for configuration parameters storage and runtime configuration integrity check
- Full ISO26262 compliant, up to ASIL-D systems ready
- Hot plug robustness
おすすめ製品
EDAシンボル / フットプリント / 3Dモデル
STマイクロエレクトロニクス - L9988
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Please select one model supplier :
EDAシンボル
フットプリント
3Dモデル
品質 & 信頼性
| 製品型番 | マーケティング･ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | Longevity Commitment | Longevity Starting Date | 材料宣誓書** |
|---|---|---|---|---|---|---|---|
| L9988-TR | 量産中 交換品交換品 | TQFP 80 14x14x1.0 ExPad Down | Automotive Safety | Ecopack2 | - | - |
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
You’re now leaving st.com and will be re-directed to our Partner’s website.
For the latest innovations and solutions from ST, sign up for our newsletters.
サンプル & 購入
| 製品型番 | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | パッケージ | 梱包形態 | RoHS | 原産国 | ECCN（米国） | ECCN（EU） | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L9988-TR | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください |
L9988-TR 量産中
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。