Texas Instruments DRV3256PEPAPRQ1

Overview

DRV3256PEPAPRQ1 from Texas Instruments is an AEC-Q100 Grade 0 (–40°C to +150°C) automotive 3-phase gate driver unit for 48-V motor drives, delivering 2-A source / 2.5-A sink peak gate current, supporting 90-V MOSFET V_DS transients and 105-V bootstrap voltage, with integrated 3x shunt amplifiers and dual high-side/low-side Active Short Circuit (ASC) functionality - deployed in eTurbo, EPS, and 48-V starter-generator systems.

For engineers reviewing the DRV3256PEPAPRQ1 datasheet, DRV3256PEPAPRQ1 pinout, DRV3256PEPAPRQ1 application, or DRV3256PEPAPRQ1 equivalent, key selection criteria include ASC configuration flexibility, 48-V split-supply architecture (12-V/48-V), functional safety documentation support for ASIL D, and HTQFP-64 thermal pad layout compliance.

Technical Context

The DRV3256PEPAPRQ1 implements a three N-channel half-bridge gate driver architecture with charge-pump-assisted bootstrap circuitry enabling 100% duty-cycle PWM control and 95-V DC-link transient tolerance. Its 12-V/48-V split supply eliminates level-shifting complexity while maintaining robust gate drive under wide input voltage variation (20–90 V).

It integrates three configurable current shunt amplifiers for low-side sensing and a programmable ASC function supporting simultaneous high-side and low-side MOSFET shorting - controlled via dedicated nASCIN pin or SPI register - with fault handling and indicator pin reporting. All protection monitors (V_DS, V_GS, R_shunt, battery, thermal, regulator, clock, and analog BIST) feed into a unified fault management system.

Key Specifications

Pinout & Package

DRV3256PEPAPRQ1 uses the thermally enhanced HTQFP-64 (PAP) package (10.0 mm × 10.0 mm, 1.2 mm max height) with exposed thermal pad requiring PCB soldering for thermal and mechanical integrity per TI SLMA002/SLMA004 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase gate driver applications.

Compared with DRV3256EPAPRQ1 and DRV3256BEPAPRQ1, the DRV3256PEPAPRQ1 uniquely combines full 3x shunt amp integration, dual-mode ASC, and extended safety register set - making it the only variant qualified for ASIL D-compliant 48-V motor drives requiring both current feedback and hardware-faulted short-circuit response.

Availability

DRV3256PEPAPRQ1 is available at Aetrix Electronics and suitable for automotive 48-V motor drive applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant gate driver performance - including electric power steering, eTurbo actuation, and belt-integrated starter generators.

Supply support for DRV3256PEPAPRQ1 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 leadership in high-reliability power management and motor control solutions.

The DRV3256-Q1 product line was engineered specifically for high-power 48-V automotive motor drives - emphasizing functional safety, thermal robustness, and integration density to replace multi-chip gate driver + sensing + protection subsystems.

FAQ

What distinguishes DRV3256PEPAPRQ1 from other variants in the DRV3256-Q1 family?

The DRV3256PEPAPRQ1 includes watchdog timer functionality, VGLPU_CTRL, PVDD_UV2_LVL2, and SD_MODE_SEL register bits not present in DRV3256EPAPRQ1 or DRV3256BEPAPRQ1. These features enable enhanced functional safety diagnostics and flexible supply supervision - critical for ASIL D system designs in EPS and BISG applications. The DRV3256PEPAPRQ1 also retains all core capabilities of the base DRV3256-Q1: 3x shunt amps, dual high-side/low-side ASC, and 95-V DC-link rating.

Does DRV3256PEPAPRQ1 support 100% duty-cycle PWM operation?

Yes, DRV3256PEPAPRQ1 supports 100% duty-cycle PWM using its integrated charge-pump-assisted bootstrap architecture. This eliminates reliance on external bootstrap diodes and capacitors, reduces component count, and ensures reliable high-side FET turn-on even during sustained conduction - essential for applications like HVAC compressor hold modes or EPS assist latching.

What is the purpose of the nASCIN pin on DRV3256PEPAPRQ1?

The nASCIN pin on DRV3256PEPAPRQ1 provides hardware-level activation of the Active Short Circuit function. When pulled low, it immediately forces both high-side and low-side MOSFETs in all three phases into conduction - creating a controlled motor short for rapid fault containment. This bypasses SPI latency and firmware execution, ensuring sub-microsecond response critical for overspeed or overcurrent events in eTurbo and EPS systems.

Can DRV3256PEPAPRQ1 operate with a single 48-V supply, or does it require the 12-V/48-V split supply?

DRV3256PEPAPRQ1 requires the specified 12-V/48-V split supply architecture: 12-V for logic and gate driver bias (AVDD, DVDD), and 48-V for the high-side gate drive supply (PVDD). It cannot operate from a single 48-V rail. This architecture minimizes power loss in level-shifting circuits and maintains stable gate drive under wide PVDD variation (20–90 V), as confirmed in the device's electrical characteristics table and simplified schematic.

How does the thermal management of DRV3256PEPAPRQ1 meet AEC-Q100 Grade 0 requirements?

DRV3256PEPAPRQ1 meets AEC-Q100 Grade 0 (–40°C to +150°C) via its HTQFP-64 PowerPAD package with exposed thermal pad, which must be soldered to a dedicated PCB copper pour. Internal thermal warning (at 135°C) and shutdown (at 150°C) thresholds are monitored continuously, with status reported via nFAULT and SPI registers. Layout adherence to TI's SLMA002/SLMA004 guidelines ensures junction temperature remains within spec under 2.5-A sink current and 150°C ambient.