製品概要
概要
The L9679P is a chip that can be used in advanced airbag systems for mature airbag markets or in cut-off battery systems for 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 (VCC at 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.
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特徴
- 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/pyroswitch 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
EDAシンボル / フットプリント / 3Dモデル
STMicroelectronics - L9679P
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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 | 材料宣誓書** |
|---|---|---|---|---|---|
| L9679P | 量産中 | TQFP 100 14x14x1.0 | オートモーティブ | Ecopack2 | |
| L9679PTR | 量産中 | TQFP 100 14x14x1.0 | オートモーティブ | 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
サンプル & 購入
| 製品型番 | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | パッケージ | 梱包タイプ | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L9679P | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください | ||||||||||
| L9679PTR | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください |
L9679P 量産中
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
L9679PTR 量産中
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）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。