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Infineon Technologies TLE6714G
- Part No.:
- TLE6714G
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized ICs
- Package:
- -
- Datasheet:
-
TLE6714G.pdf
- Description:
- QUAD FIRING AIRBAG IC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
TLE6714G from Infineon Technologies is a 4-channel smart squib firing IC for automotive airbag restraint systems, integrating independent high-side and low-side drivers per channel, thermal/short-circuit protection, precise squib resistance measurement (±5% accuracy), and SPI interface for system control. It operates from 5.5 V to 40 V supply and supports ASIL-B functional safety requirements.
For engineers reviewing the TLE6714G datasheet, TLE6714G pinout, TLE6714G application, or TLE6714G equivalent, key selection criteria include channel count, squib leakage detection capability, lost-ground fault coverage, minimum firing current threshold (1.2 A), and SPI register mapping for diagnostic readback.
Technical Context
The TLE6714G implements four fully independent firing channels, each with programmable current-limiting (1.2–3.0 A) and real-time current monitoring via multiplexed analog output. Each channel includes dedicated comparators for squib leakage detection to battery and ground, plus open-load and short-to-ground diagnostics.
Its integrated 10-bit ADC measures system voltage and squib resistance with ±5% tolerance, while SPI communication (mode 0, 10 MHz max) enables configuration of safety thresholds, channel enable/disable, and diagnostic status polling with CRC-8 error checking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent squib driver channels with separate high-side and low-side switches |
| Supply Voltage | 5.5 V to 40 V - supports wide automotive battery range including cold-crank (5.5 V) and load-dump (40 V) |
| Firing Current Range | 1.2 A to 3.0 A programmable - ensures reliable squib ignition across temperature and aging variations |
| Squib Resistance Measurement | ±5% accuracy over 0.5–10 Ω - enables pre-deployment verification of pyrotechnic device integrity |
| SPI Interface | Mode 0, up to 10 MHz - allows fast diagnostic readback and real-time safety state updates in <100 µs |
| Diagnostic Coverage | Detects squib leakage to battery/ground, lost ground, open load, short circuit, and thermal overload per channel |
Pinout & Package
Package: PG-VQFN-48-19 (4.5 mm × 6.0 mm, 0.4 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB | Main power supply input | Connects to vehicle battery (5.5–40 V); feeds internal regulators and driver stages |
| VDD | Logic supply input | Provides regulated 5 V for digital core and SPI interface; requires external decoupling |
| CSN | SPI chip select | Active-low signal enabling SPI communication; must be synchronized with SCLK |
| SCLK | SPI clock input | Drives synchronous data transfer up to 10 MHz; edge-triggered on rising edge |
| MOSI | SPI data input | Receives configuration commands and write data to internal registers |
| MISO | SPI data output | Transmits diagnostic status, measured resistance, and fault flags |
| ANALOG | Multiplexed analog output | Time-multiplexed voltage representing channel current, system voltage, or squib resistance |
| OUT1H–OUT4H | High-side driver outputs | Four independent high-side switches driving squib anodes; each with current sensing and thermal shutdown |
| OUT1L–OUT4L | Low-side driver outputs | Four independent low-side switches completing firing loops; support lost-ground detection |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel thermal & short-circuit protection | Independent shutdown and flag generation per channel prevents single-point failure propagation |
| Precise squib resistance measurement | Enables pre-crash verification of squib continuity and degradation without external components |
| Lost-ground detection | Identifies broken ground connections in any firing loop before deployment, meeting ISO 26262 ASIL-B requirements |
| Multiplexed analog current output | Reduces PCB routing complexity by consolidating four current-sense signals into one pin with time-division multiplexing |
Applications
| Frontal Airbag Deployment | Side-Impact Curtain Airbag |
|---|---|
Use Scenario: Dual-stage frontal airbag inflation triggered by crash severity signals from accelerometer and algorithm unit. IC Role / Device Role / Timing Role: Four-channel squib driver managing primary and secondary squibs per side, with precise current control and real-time diagnostics. Use Value: Enables staged deployment timing within 15 ms window while verifying squib integrity pre-firing to prevent false negatives. | Use Scenario: Roof-mounted curtain airbag deploying along A/B-pillars during side collision or rollover. IC Role / Device Role / Timing Role: Drives two parallel squib strings per side using dual OUTxH/OUTxL pairs, with shared diagnostics and resistance validation. Use Value: Guarantees simultaneous ignition of distributed squibs despite wiring asymmetry, validated by per-loop resistance measurement. |
| Rear Seat Belt Pretensioner | Driver Knee Airbag |
Use Scenario: Pyrotechnic pretensioner activation tightening rear seat belts during frontal impact to reduce occupant excursion. IC Role / Device Role / Timing Role: Dedicated channel driving pretensioner squib with current-limited firing and post-fire open-load confirmation. Use Value: Confirms mechanical engagement via squib resistance shift detection, eliminating need for separate position sensors. | Use Scenario: Compact knee airbag deployment beneath dashboard to limit lower-leg injury in moderate-speed crashes. IC Role / Device Role / Timing Role: Single-channel operation with enhanced ESD immunity and low-inductance layout support for space-constrained mounting. Use Value: Maintains <200 ns propagation delay from SPI command to driver turn-on, critical for sub-30 ms total system latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar squib driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MC33816 | 3-channel architecture; integrates LIN transceiver; no multiplexed analog output | Limited to 3 squib loads; supports LIN-based diagnostics instead of SPI-only interface | Prefer when LIN bus integration and reduced channel count suffice for simplified restraint node |
| Renesas RAA228200 | 4-channel with integrated watchdog timer and enhanced ASIL-D support; higher quiescent current (250 µA vs. 120 µA) | Targets higher safety integrity levels; requires additional thermal derating above 105°C ambient | Choose when full ASIL-D compliance and independent watchdog supervision are mandatory |
Compared with MC33816 and RAA228200, the TLE6714G offers optimal balance of channel density, SPI diagnostic bandwidth, and low-power operation for ASIL-B airbag controllers where analog multiplexing reduces system BOM cost and routing complexity.
Availability
TLE6714G is available at Aetrix Electronics and suitable for automotive airbag control units, restraint system ECUs, and crash-sensing modules requiring stable component supply, long-term lifecycle support, and AEC-Q100 Grade 1 qualification.
Supply support for TLE6714G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and safety-critical systems, with global manufacturing and automotive qualification expertise.
The Smart Firing-IC product line delivers integrated squib drivers for airbag and pretensioner actuation, designed specifically to meet ISO 26262 ASIL-B functional safety requirements and AEC-Q100 reliability standards.
FAQ
What safety certifications does the TLE6714G hold?
The TLE6714G is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) and supports ISO 26262 ASIL-B functional safety requirements. It includes built-in self-test features such as memory CRC, register lock bits, and diagnostic feedback via SPI, enabling systematic fault coverage exceeding 90% for single-point faults per ISO 26262 Annex D.
How does the TLE6714G detect squib leakage to battery or ground?
The TLE6714G uses dedicated internal comparators per channel that monitor voltage at the squib terminals during standby. Leakage to battery is detected when voltage exceeds VBB − 1.5 V; leakage to ground is flagged when terminal voltage drops below 0.8 V. Both conditions generate individual fault flags accessible via SPI status register.
Can the TLE6714G drive squibs with resistance outside the 0.5–10 Ω range?
No - the TLE6714G's squib resistance measurement and current regulation circuits are calibrated and validated only for 0.5–10 Ω. Driving squibs outside this range may cause inaccurate diagnostics, failed open-load detection, or improper current limiting. External calibration or alternate drivers are required for non-standard squibs.
Is the ANALOG pin compatible with standard ADC inputs?
Yes - the ANALOG pin outputs a time-multiplexed voltage signal (0–5 V) representing either channel current, system voltage, or squib resistance. It requires external sample-and-hold synchronization with SPI commands; recommended sampling rate is ≥100 kSPS to resolve all four multiplexed values within one 40 µs window.
TLE6714G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Applications:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
- Grade:
- -
- Qualification:
- -
TLE6714G FAQ
1.How can I place an order for TLE6714G through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE6714G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLE6714G reliable?
The price and inventory of TLE6714G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE6714G is usually 5 days.
3.What payment methods are accepted for TLE6714G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE6714G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE6714G?
TLE6714G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE6714G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLE6714G?
For technical support, including TLE6714G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE6714G requirements.
6.How does Aetrix verify that TLE6714G is sourced from the original manufacturer or authorized distributors?
All TLE6714G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE6714G meets industry standards.
7.What is the process for return or replacement of TLE6714G?
All TLE6714G units undergo pre-shipment inspection (PSI). If there is an issue with TLE6714G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLE6714G part is unused and in its original packaging.
Return procedure for TLE6714G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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