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The L9679P is an advanced airbag system chip solution targeted for mature airbag market and integrated safety markets. This device is family compatible with the L9678 and L9680 devices. Safety system integration is enabled through higher power supply currents and integrated PSI-5 satellite interface.
High frequency power supply design allows further cost reduction by using smaller and less expensive external components. All switching regulators operate at 1.882 MHz while buck converters have integrated synchronous rectifiers.
Additional attention is given to system integrity and diagnostics. The reserve capacitor is electrically isolated from the boost regulator by a 50 mA nominal fixed current source, controlling in-rush an additional capacitor discharge fixed current source is integrated to diagnose the reserve capacitor value and ESR. The same current sources can be used to discharge the capacitor at shutdown.
Thanks to low quiescent current, the device can be directly connected to battery. In this way, the device start-up and shutdown are controlled through the wake-up input function. The power supply and crossover function are controlled automatically through the internal state machine.
The user can select both ECU logic voltage (VCCat 3.3 V or 5.0 V) and energy reserve output voltage (at either 23 V or 33 V). Deployment voltage is set to a maximum of 25 V for all profiles and can be controlled through external safing switch circuit using the high side safing switch reference enabled through the system SPI interface or the arming logic.主要特性
- AEC-Q100 qualified
- Boost regulator for energy reserve
- 1.882 MHz operation, Iload= 55 mA max
- Output voltage user selectable, 23 V/ 33 V ±5%
- Capacitor value & ESR diagnostics
- Boost regulator for PSI-5 SYNC pulse
- 1.882 MHz operation,
- Output voltage, 12 V/14.75 V, user configurable
- Buck regulator for remote sensor
- 1.882 MHz operation
- Output voltage, 7.2 V/9 V ±4%, user configurable
- Buck regulator for micro controller unit
- 1.882 MHz operation
- Output voltage user selectable, 3.3 V or 5.0 V ±3%
- Integrated energy reserve crossover switch
- 3 Ω - 912 mA max
- Switch active output indicator
- Battery voltage monitor & shutdown control with Wake-up control
- System voltage diagnostics with integrated ADC
- Squib deployment drivers
- 8 channel HSD/LSD
- 25 V max deployment voltage
- Various deployment profiles
- Current monitoring
- Rmeasure, STB, STG & Leakage diagnostics
- High & low side driver FET tests
- High side safing switch regulator and enable control
- Two channel remote sensor interface
- PSI-5 satellite sensors
- Three channel GPO, HSD or LSD configurable, with PWM 0-100% control
- Nine channel hall-effect, resistive or switch sensor interface
- User customizable safing logic
- Specific disarm signal for passenger airbag
- Temporal and algorithmic Watchdog timers
- End of life disposal interface
- Temperature sensor
- 32 bit SPI communications
- 5.5 V minimum operating voltage at device battery pin
- Operating temperature, -40 to 95 °C
- Packaging - 100 pin
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L9679P |
批量生产
|
TQFP 100 14x14x1.0 | 汽车应用 | Ecopack2 | |
| L9679PTR |
批量生产
|
TQFP 100 14x14x1.0 | 汽车应用 | Ecopack2 |
(**) 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 。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| L9679P | 没有经销商，请联系我们的销售办事处 |
批量生产
|
EAR99 | NEC | Tray | TQFP 100 14x14x1.0 | - | - | MALAYSIA | 4.9 / 1k | ||
| L9679PTR | 1 distributors |
批量生产
|
EAR99 | NEC | Tape And Reel | TQFP 100 14x14x1.0 | - | - | MALAYSIA | 4.9 / 1k | ||
供货状态
批量生产ECCN (US)
EAR99Budgetary Price (US$)*/Qty
4.9 / 1k供货状态
批量生产ECCN (US)
EAR99Budgetary Price (US$)*/Qty
4.9 / 1k