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Texas Instruments TPIC71004TDCARQ1
- Part No.:
- TPIC71004TDCARQ1
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-PowerTFSOP (0.240", 6.10mm Width)
- Datasheet:
-
TPIC71004TDCARQ1.pdf
- Description:
- IC INTFACE SPECIALIZED 48HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,790
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Product details
Overview
TPIC71004TDCARQ1 from Texas Instruments is a quad-channel automotive-grade squib driver IC for airbag deployment systems, integrating four independent high-side and low-side drivers with programmable firing current (1.2 A or 1.75 A), 2 ms / 0.5 ms typical dwell time, and SPI-controlled diagnostics. It operates across –40°C to 105°C and features 40-V pin tolerance on all I/O except power/ground rails.
For engineers reviewing the TPIC71004TDCARQ1 datasheet, TPIC71004TDCARQ1 pinout, TPIC71004TDCARQ1 application, or TPIC71004TDCARQ1 equivalent, key selection considerations include its dual-current-mode squib drive capability, integrated loop diagnostics (Zx/ZMx leakage/resistance measurement), thermal protection architecture, and HTSSOP-48 PowerPad™ package with independent high/low-side switch control logic.
Technical Context
The TPIC71004TDCARQ1 implements four fully independent squib channels, each with thermally protected high-side (current-regulated) and low-side (RDS(on)-mode) drivers. Firing voltage range is 10 V–35 V (transients to 40 V), with programmable dwell time up to 8.2 ms via SPI-mapped registers.
Diagnostics include real-time squib resistance measurement, inter-channel and battery/ground leakage detection (functional without load), and analog multiplexed output via AMX_OUT. Safety logic requires coordinated TZ0=H and IWD=L inputs plus valid SPI configuration sequence to enable deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Firing Current Options | 1.2 A min or 1.75 A min (SPI-selectable per channel group; low-side fixed higher) |
| Dwell Time Range | Programmable up to 8.2 ms; typical 2 ms (1.2 A) or 0.5 ms (1.75 A) |
| Operating Temp | –40°C to 105°C ambient; qualified for automotive AEC-Q100 Grade 1 |
| Pin Voltage Rating | 40 V absolute max on all I/O pins except GNDx, AGND, DGND, VCC5, VDDIO, AMX_OUT |
| Package | HTSSOP-48 (DCA) with exposed PowerPad™ for thermal dissipation |
| SPI Interface | Slave-only with parity check; used for register config, status readback, and fault reporting |
| Diagnostic Coverage | Measures squib resistance, Zx/ZMx leakage to battery/ground/inter-channel, no-load functional |
Pinout & Package
TPIC71004TDCARQ1 uses a thermally enhanced 48-pin HTSSOP (DCA) package with exposed PowerPad™ for improved heat transfer. Pin numbering follows standard counter-clockwise layout starting from Pin 1 (RESET_N) at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET_N | Active-low reset input | Asynchronous hardware reset; released high by µC/power supply after voltage stabilization |
| TZ0 | Hardware deployment enable | Must be high to allow deployment; part of dual-safety logic with IWD=L |
| IWD | Watchdog input | Must be low to permit deployment; complements TZ0 for fail-safe activation |
| VZ0–VZ3 | High-side driver output rails | Connect to squib anode; support 10–35 V firing voltage, 40 V transient tolerance |
| Z0–Z3 | Low-side driver output terminals | Connect to squib cathode; sink deployment/diagnostic current with avalanche protection |
| ZM0–ZM3 | Diagnostic sense inputs | Enable squib resistance/leakage measurement without load; routed to internal ADC mux |
| AMX_OUT | Analog multiplexed output | Single-pin buffered analog output for diagnostic voltage readings (e.g., squib voltage drop) |
| SCLK/CS_N/SIMO/SOMI | SPI interface signals | Full-duplex slave interface with parity; configures registers and reads fault status |
Key Features
| Feature | Design Value |
|---|---|
| Independent high/low-side control | Each channel's HS and LS switches controlled separately via SPI, enabling precise timing sequencing (HS off → LS off +100 µs) |
| Load-free diagnostics | Zx/ZMx leakage measurements function without squib connected-enables pre-deployment system validation |
| Thermal shutdown with recovery | Over-temperature protection disables channel during extended dwell; auto-resets after cooling |
| Ratiometric ADC reference | External VA1/VA2 pins connect to µC ADC supply, enabling ratio-metric squib resistance calculation |
| No external clamping required | Internal substrate injection protection eliminates need for external TVS/clamps on squib pins during dynamic shorts |
Applications
| Frontal Airbag Module | Side-Curtain Airbag System |
|---|---|
Use Scenario: Dual-stage frontal airbag deployment requiring precise current-controlled squib firing and pre-crash self-test. IC Role / Device Role / Timing Role: Quad-channel squib driver providing synchronized high-side/low-side switching with programmable dwell and current levels per stage. Use Value: Enables staged inflation via 1.2 A (stage 1) and 1.75 A (stage 2) firing modes, validated using on-chip Zx/ZMx resistance measurement before crash. |
Use Scenario: Side-curtain airbag with distributed squibs across roof rail, requiring robust diagnostics under vibration and temperature cycling. IC Role / Device Role / Timing Role: Fault-tolerant squib driver performing continuous leakage monitoring between squib channels and ground/battery. Use Value: Detects latent insulation degradation (e.g., moisture ingress) via ZMx-to-ground leakage measurement-no squib load required for test execution. |
| Driver Knee Airbag | Passenger Presence Detection Integration |
Use Scenario: Compact knee airbag module where space constraints demand integrated diagnostics and minimal external components. IC Role / Device Role / Timing Role: High-density squib driver delivering 1.75 A firing current in <0.5 ms with built-in thermal protection and AMX_OUT analog reporting. Use Value: Eliminates need for external current-sense resistors and clamping diodes-reduces BOM count and PCB area while maintaining ASIL-B compliance. |
Use Scenario: Occupant classification system that validates squib integrity prior to enabling passenger airbag based on seat sensor input. IC Role / Device Role / Timing Role: SPI-configurable squib driver interfacing with vehicle body controller to report squib resistance and open/short status via status registers. Use Value: Enables conditional deployment authorization: only if squib resistance falls within 1.2–4.5 Ω range AND no ZMx leakage faults are latched. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar squib driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPIC71003TDCARQ1 | Triple-channel version; identical architecture, register map, and diagnostics but one fewer squib channel | Used in cost-optimized or space-constrained modules with ≤3 squibs (e.g., driver-only airbag + knee + side) | Select when full quad-channel capability is unnecessary and BOM simplification is prioritized |
| MC33816AEKR2 | NXP device with 4-channel architecture, but uses parallel control interface (not SPI); different fault reporting scheme and no AMX_OUT analog mux | Deployed in legacy platforms with microcontroller GPIO-based control and discrete ADC routing | Choose only when migrating from existing MC33816-based designs-no SPI compatibility or pin mapping |
Compared with TPIC71004TDCARQ1, TPIC71003TDCARQ1 reduces channel count without altering safety logic or diagnostic depth, while MC33816AEKR2 requires complete firmware and layout redesign due to non-SPI interface and absence of analog diagnostic output.
Availability
TPIC71004TDCARQ1 is available at Aetrix Electronics and suitable for frontal airbag modules, side-curtain systems, and driver knee airbag applications requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for TPIC71004TDCARQ1 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive ICs, with decades of experience in safety-critical automotive electronics.
The TPIC71004TDCARQ1 belongs to TI's automotive squib driver product line, designed specifically for ASIL-B compliant airbag control units requiring integrated diagnostics, dual-current firing modes, and robust transient protection.
FAQ
What is the maximum firing voltage supported by the TPIC71004TDCARQ1?
The TPIC71004TDCARQ1 supports a maximum average firing voltage of 35 V between VZx and Zx pins, with transient tolerance up to 40 V on all I/O pins except GNDx, AGND, DGND, VCC5, VDDIO, and AMX_OUT. This enables reliable operation under load-dump conditions common in 12 V automotive electrical systems. The TPIC71004TDCARQ1 maintains safe switching behavior even during short-to-ground events during deployment.
Does the TPIC71004TDCARQ1 require external clamping devices on squib pins?
No, the TPIC71004TDCARQ1 does not require external clamping devices on squib pins. Its internal architecture prevents substrate injection effects during dynamic shorts to ground, eliminating the need for external TVS diodes or clamps. This feature is confirmed in the datasheet's "Features" section and validated through TI's automotive qualification testing. The TPIC71004TDCARQ1 achieves this via integrated protection circuitry tied to the Zx/ZMx pin structure.
How does the TPIC71004TDCARQ1 perform squib resistance measurement without a connected load?
The TPIC71004TDCARQ1 performs squib resistance measurement using ZMx pins in conjunction with internal current sources and the AMX_OUT analog buffer-functioning even when no squib is physically connected. This allows pre-deployment verification of wiring integrity and connector contact. The TPIC71004TDCARQ1 leverages dedicated diagnostic registers and ratiometric VA1/VA2 reference inputs to compute resistance values directly in the host microcontroller.
What safety logic prevents inadvertent deployment in the TPIC71004TDCARQ1?
Inadvertent deployment in the TPIC71004TDCARQ1 is prevented by dual hardware safety inputs (TZ0 = high and IWD = low) combined with a valid SPI configuration sequence. Both conditions must be met simultaneously, and the high-side/low-side switches remain disabled until all registers are correctly programmed. The TPIC71004TDCARQ1 also enforces automatic turn-off sequencing (HS off first, then LS off after ~100 µs) to avoid latch-up or uncontrolled current flow.
Is the TPIC71004TDCARQ1 pin-compatible with other devices in the TPIC7100x-Q1 family?
The TPIC71004TDCARQ1 is pin-compatible with TPIC71003TDCARQ1 (triple-channel) and TPIC71002TDCARQ1 (dual-channel) within the same HTSSOP-48 (DCA) package footprint. All share identical pin functions, power domains, and SPI interface layout-only unused channel pins (e.g., VZ3/Z3/ZM3) are NC on lower-channel variants. This enables scalable design reuse across airbag module tiers while retaining the same PCB layout for the TPIC71004TDCARQ1 and its siblings.
TPIC71004TDCARQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-PowerTFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Airbag
- Interface:
- SPI Serial
- Voltage - Supply:
- -
- Supplier Device Package:
- 48-HTSSOP
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
TPIC71004TDCARQ1 FAQ
1.How can I place an order for TPIC71004TDCARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPIC71004TDCARQ1 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 TPIC71004TDCARQ1 reliable?
The price and inventory of TPIC71004TDCARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPIC71004TDCARQ1 is usually 5 days.
3.What payment methods are accepted for TPIC71004TDCARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPIC71004TDCARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPIC71004TDCARQ1?
TPIC71004TDCARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPIC71004TDCARQ1 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 TPIC71004TDCARQ1?
For technical support, including TPIC71004TDCARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPIC71004TDCARQ1 requirements.
6.How does Aetrix verify that TPIC71004TDCARQ1 is sourced from the original manufacturer or authorized distributors?
All TPIC71004TDCARQ1 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 TPIC71004TDCARQ1 meets industry standards.
7.What is the process for return or replacement of TPIC71004TDCARQ1?
All TPIC71004TDCARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPIC71004TDCARQ1, 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 TPIC71004TDCARQ1 part is unused and in its original packaging.
Return procedure for TPIC71004TDCARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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