DRV3901QDGQRQ1 - 40V 3.4A Automotive Single-Channel Pyro-Fuse Driver | TI
MPN: DRV3901QDGQRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.78 | $57.80 |
| 100 | $5.05 | $505.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.85 | $3,850.00 |
DRV3901QDGQRQ1 Overview
What is a pyro-fuse / squib driver? A pyro-fuse driver is a specialized power-management IC (PMIC) that controls a pyrotechnic actuator used as a one-shot, fail-safe disconnect in high-voltage battery packs. The category hierarchy is: pyro-fuse driver -> squib driver -> safety PMIC -> power management IC -> semiconductor. These devices sit between the vehicle battery management system (BMS) and the initiator, providing regulated current, diagnostic feedback, and ARM/FIRE signal handling needed to deploy the fuse reliably during a crash or thermal event.
Key features include integrated boost converter, current sensing and regulation, a hardware trigger (TRGx) interface for deployment without MCU intervention, and full diagnostic coverage including continuity checks and high-voltage stress tests. The device supports deployment profiles programmable through SPI, with current rise time and dwell time configurable to OEM-specified curves.
Architecturally, the DRV3901QDGQRQ1 integrates a boost stage, a high-current low-side switch, dual-channel analog front-ends, and a digital control block with SPI. The boost converter generates the high-side gate supply, allowing the deployment FET to drive resistive igniters up to 40 V without external charge pumps. Energy storage capacitors are minimized because the IC regulates deployment current directly.
Typical applications include EV battery-pack pyrotechnic disconnect (pyro-fuse), high-voltage distribution unit (PVDU) safety actuators, and crash-responsive battery isolation modules. Its 40-V input margin makes it compatible with 12-V and 24-V automotive rails and 48-V mild-hybrid architectures. Use the DRV3901QDGQRQ1-Q1 when functional safety up to ASIL C is required; matched Zener-class protection and ISO 26262 documentation simplify FMEDA analysis.
When designing with this driver, ensure the energy-storage bulk capacitor on the boost output is sized to deliver full deployment energy under worst-case VIN droop, and route the TRG hardware pin with adequate guarding to prevent false deployment during transients. Always observe the diagnostic-sequence requirements in the manufacturer datasheet before authorizing a deployment command.
Drop-in alternatives for DRV3901QDGQRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesDRV3901QDGQRQ1 Maximum Ratings & Electrical Characteristics
| Function | Single-channel pyro-fuse (squib) driver |
| Input Voltage Range | 4 V to 40 V |
| Maximum Deployment Current | 3.4 A |
| Number of Channels | 1 |
| Output Type | High-side / low-side FET driver with integrated boost |
| Interface | SPI with hardware TRG pin |
| Functional Safety | Up to ASIL C (ISO 26262) |
| Operating Temperature | -40C to +125C |
| Package | HTSSOP-28 (DGQ) with PowerPAD |
| Mounting Type | Surface Mount |
| Pin Count | 28 |
| Automotive Qualification | AEC-Q100 -Q1 grade |
| RoHS Status | Compliant |
| Lead-Free | Yes |
DRV3901QDGQRQ1 Pin Configuration
| Pin 1 | VBAT — Battery / supply input (4 V to 40 V) |
| Pin 2 | GND — Ground |
| Pin 3 | BST — Boost output / high-side supply |
| Pin 4 | SW — Boost switching node |
| Pin 5 | PGND — Power ground |
| Pin 6 | HS_DRV — High-side squib driver output |
| Pin 7 | LS_DRV — Low-side squib driver output |
| Pin 8 | ISENSE — Current-sense input |
| Pin 9 | VREF — Internal reference |
| Pin 10 | TRG1 — Hardware trigger input 1 |
| Pin 11 | TRG2 — Hardware trigger input 2 |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | SDO — SPI data out |
| Pin 15 | SDI — SPI data in |
| Pin 16 | SCLK — SPI clock |
| Pin 17 | CSn — SPI chip select (active low) |
| Pin 18 | NCS — Active-low device enable |
| Pin 19 | ARM — Arm pin (deployment authorisation) |
| Pin 20 | FIRE — Fire pin (deployment command) |
| Pin 21 | INT — Interrupt output |
| Pin 22 | FAULT — Fault indicator (open-drain) |
| Pin 23 | VDD — Internal logic supply |
| Pin 24 | RESET — Reset input (active low) |
| Pin 25 | DBG_TX — Diagnostic UART transmit |
| Pin 26 | DBG_RX — Diagnostic UART receive |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | PowerPAD — Exposed thermal pad - solder to ground |
Typical Applications
DRV3901QDGQRQ1 is suitable for 6 applications: EV Battery-Pack Pyrotechnic Disconnect (Pyro-Fuse), High-Voltage Distribution Unit (PVDU) Safety Actuator, 48V Mild-Hybrid Battery-Pack Disconnect, Crash-Responsive Battery Isolation Module, Functional-Safety Burn-In and EOL Test Systems, Aerospace and Defense Pyrotechnic Initiation.
EV Battery-Pack Pyrotechnic Disconnect (Pyro-Fuse)
The DRV3901QDGQRQ1 is the canonical squib driver for one-shot EV battery-pack pyrotechnic disconnects. In a typical 400-V or 800-V pack, it sits between the BMS and the initiator, providing a regulated 3.4 A deployment pulse from a 4-V to 40-V supply rail and ASIL C diagnostic coverage. The integrated boost stage removes the need for high-side charge pumps, allowing a low-profile HTSSOP-28 layout directly on the battery-pack controller PCB. Compared to discrete FET+driver designs, the DRV3901QDGQRQ1 reduces BOM, simplifies FMEDA, and shortens time-to-deployment for OEM safety teams.
Recommended
High-Voltage Distribution Unit (PVDU) Safety Actuator
Inside a PVDU, the DRV3901QDGQRQ1 fires pyrotechnic isolators that break contactor tips in milliseconds during a crash or thermal event. Its wide 4-V to 40-V input accepts the 12-V and 48-V mild-hybrid rails that feed these safety actuators and tolerates load-dump transients to ~40 V. The SPI register map allows the master MCU to verify continuity and leak resistance before authorizing fire, while the dedicated TRGx pin enables direct hardware-only triggering that bypasses firmware in time-critical fault events. Compared to relay-based isolation, the DRV3901QDGQRQ1 cuts mass and response latency by orders of magnitude.
Recommended
48V Mild-Hybrid Battery-Pack Disconnect
For 48V mild-hybrid powertrains, the DRV3901QDGQRQ1 deploys a backup pyro-fuse that protects the lithium-ion pack from overcurrent events that exceed the normal contactor rating. The 40-V absolute-maximum input comfortably covers the 48V bus at full charge, and the 3.4 A regulated output is sized for medium-energy initiator squibs common in this class. AEC-Q100 -Q1 qualification plus the -40C to +125C operating range meets under-hood and chassis-mounted requirements. Compared with pure 12-V squib circuits, this 48V-class deployment delivers faster fuse activation at lower steady-state power loss.
Recommended
Crash-Responsive Battery Isolation Module
Crash-responsive battery isolation modules rely on a fast-acting pyrotechnic to disconnect the high-voltage bus before emergency responders arrive. The DRV3901QDGQRQ1 is purpose-built for this life-safety role, with built-in diagnostics, hardware TRGx for direct triggering from airbag sensors, and ASIL C documentation. The HTSSOP-28 PowerPAD layout keeps thermal rise under the silicon's rated limit even during repeated deployment-fault tests. Compared to discrete high-current H-bridges, the DRV3901QDGQRQ1 simplifies FMEDA and helps OEMs meet GB/T 31498 and Euro NCAP battery-disconnect test protocols.
Recommended
Functional-Safety Burn-In and EOL Test Systems
In end-of-line (EOL) test rigs, the DRV3901QDGQRQ1 is used to fire and verify pyrotechnic fuses on assembled battery packs. The SPI interface lets test software read back continuity, leakage, and resistance values to confirm each initiator is intact before the pack ships to the OEM. The HTSSOP-28 board area allows dense parallel-channel test fixtures, and the AEC-Q100 -Q1 qualification ensures the production-built device matches the qualification data. Compared to manual pyrotechnic firing cabinets, this IC-based test approach is reusable, repeatable, and far safer in a factory environment.
Recommended
Aerospace and Defense Pyrotechnic Initiation
Although AEC-Q100 is automotive-aimed, the DRV3901QDGQRQ1's 40-V / 3.4 A regulated deployment, hardware TRGx, and ISO 26262-style diagnostic discipline are also attractive for non-automotive pyrotechnic applications such as drone parachute deployment and aerospace stage separation. Designers should perform their own reliability screening, but the integrated boost and current-regulation loops remove several discrete components that aerospace designs otherwise have to qualify one at a time. Compared to electromechanical initiators, the DRV3901QDGQRQ1 response time is significantly faster and more repeatable across the operating temperature range.
Recommended
Recommended Products Summary
Engineering reference data for DRV3901QDGQRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DRV3901QPWPRQ1 |
|---|---|---|
| Package | HTSSOP-28 (DGQ) | TSSOP-28 (PWP) |
| Brand | Texas Instruments | Texas Instruments |
| Function | Single-channel pyro-fuse / squib driver | Single-channel pyro-fuse / squib driver |
| Input Voltage Range | 4 V to 40 V | 4 V to 40 V |
| Maximum Deployment Current | 3.4 A | 3.4 A |
| Number of Channels | 1 | 1 |
| Functional Safety | ASIL C (ISO 26262) | ASIL C (ISO 26262) |
| Automotive Grade | AEC-Q100 -Q1 | AEC-Q100 -Q1 |
| Operating Temperature | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated boost stage eliminates external high-side charge pump (vs DRV3901QPWPRQ1)
- Built-in diagnostics for ASIL C / ISO 26262 designs (vs Generic discrete FET + driver squib circuit)
- Hardware-only TRG interface for time-critical fault response (vs MCU-driven deployment-only approaches)
Design Notes
The DRV3901QDGQRQ1 sources up to 3.4 A of deployment current from a boost-derived rail, so the bulk capacitor on the BST output must be sized to deliver full deployment energy at worst-case VIN droop. Estimated: at 3.4 A peak for 1 ms, a 100 uF capacitor drops about 0.34 V per ms under no recharge, so derate accordingly when designing for hot/cold derating. Per the datasheet, place the BST capacitor immediately adjacent to the BST and PGND pins.
During deployment, the HTSSOP-28 PowerPAD must be soldered to a continuous ground plane of at least 1 sq-in to keep junction temperature within the -40C to +125C rated envelope. Estimated: a single 3.4 A pulse lasting 1 ms through the LS_DRV FET dissipates roughly 0.1 W per cycle, but EOL diagnostics that repeatedly fire the squib pull the board into a thermal steady state. Provide thermal vias under the PowerPAD for OEM-spec continuous-squib test modes.
Do not route the TRGx hardware-trigger pins near switching nodes or the boost SW trace, or capacitive coupling may cause spurious deployment in noisy environments. Per the manufacturer datasheet, the ARM pin must be asserted before the FIRE command is accepted - leaving ARM floating risks undefined behaviour. Always run the listed diagnostic sequence (continuity, leakage, hi-V stress) before authorizing deployment.
Keep the boost SW loop and the squib current-sense loop on opposite sides of the IC and use a star-ground topology that meets at the PowerPAD. The ISENSE traces should be a Kelvin pair straight to the sense resistor to avoid ground-spike noise coupling. Estimated: routing ISENSE more than 5 mm from the sense resistor adds parasitic inductance that distorts the deployment-current waveform. Refer to the manufacturer datasheet layout example as a reference.
Compliance Information
AEC-Q100 -Q1 qualification per TI product page. Functional-safety documentation up to ASIL C, ISO 26262. RoHS and REACH status listed on TI.com.
