产品概要
描述
L99BM2P is a single channel pyro-fuse driver capable to break high voltage battery line quickly and reliably in case of short circuit.
To accomplish this function, the device features a dual FET output stage made of a HS and a LS powerMOS. The stage is equipped with a closed loop current feedback and can be configured to deliver controlled firing profiles programming both current value and time duration.
Moreover, the power stage is able to perform a defined number of auto-retry attempts based on the success or not of the deployment.
The device embeds a programmable firing logic allowing to generate the trigger signal from two SPI commands or from two digital inputs (FENH/FENL).
The digital input triggers are compatible with both level and PWM encoding, supporting 16 kHz and 125 kHz encoded signals.
The device supports the charging of an external capacitor to be used as tank capacitor or as energy reserve (ER) in case of battery loss. An internal boost regulator can be used to control the ER cap voltage around a programmable setpoint. Boosting the input battery voltage allows using smaller ER capacitor values to store the energy needed for firing, even in case of ECU battery loss.
The device has been designed to deliver maximum safety and performance while still being energy efficient. A low-power operation strategy allows minimizing the idle consumption, keeping the device in an ultra low power state while still performing all the diagnostic.
The periodicity of the diagnostic sweeps can be programmed in order to comply with any FTTI. During such ultra low power state, the device is still sensitive to wake-up/trigger sources in order to be ready to fire.
Operation in conjunction with L99BM2C companion chip allows simplifying the software development, as many safety mechanisms are already implemented by L99BM2C.
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性能一览
- Very low power consumption:
- Less than 10 μA in deep-sleep mode (only trigger detection enabled)
- Less than 4 mA in low-power mode (trigger detection enabled, ER boost recharge active, cyclic diagnostics every 100 ms)
- Boost regulator to charge Energy Reserve (ER) with bang-bang control to reduce consumption
- FENH/FENL digital input triggers, compatible to level or PWM signals (16 kHz and 125 kHz), with line integrity check feature
- Autonomous cyclic diagnostic routine to ensure detection of all failures which may prevent safe deployment and/or cause inadvertent deployment
- Programmable deployment profile: current value and time duration can be adapted to different pyro-fuse igniters
- Firing strategy supporting multiple retry attempts based on user-selectabl
- FIRE_GOOD signal
- Embedded NVM for configuration parameters storage and runtime configuration integrity check
- Easy integration with L99BM2C companion CSA, implementing many of the safety mechanisms, thus allowing easy L99BM2P plug and play in the system
- Pyro-fuse deployment available down to a minimum operating battery voltage of 6 V
- 24-bit peripheral SPI for direct MCU/L99BM2P interface
- Compatible with pyro-fuses certified according LV-16 and USCAR-28
- Very low power consumption:
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STMicroelectronics - L99BM2P
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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** |
|---|---|---|---|---|---|---|---|
| L99BM2P-FN-TR | Active 产品已量产 | VFQFN 5X5X0.9 32+4L WETT. FLANKS | Industrial | Ecopack2 | - | - | |
| L99BM2P-FP-TR | Active 产品已量产 | TQFP 32 7x7x1.0 | Industrial | Ecopack2 | - | - | |
L99BM2P-FN-TR
Package:
VFQFN 5X5X0.9 32+4L WETT. FLANKSMaterial Declaration**:
L99BM2P-FP-TR
Package:
TQFP 32 7x7x1.0Material 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) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L99BM2P-FN-TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | ||||||||||
| L99BM2P-FP-TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 |
L99BM2P-FN-TR Active
L99BM2P-FP-TR Active