Texas Instruments DRV8304SRHAR

Overview

DRV8304SRHAR from Texas Instruments is a 38-V, 3-phase smart gate driver IC for BLDC motor control, integrating three half-bridge drivers, triple current-sense amplifiers (CSA), high-side charge pump, low-side linear regulator, and comprehensive protection. It supports 6–38 V supply, 15–150 mA peak source/30–300 mA peak sink gate drive, and adjustable CSA gain (5–40 V/V). Used in field-oriented control (FOC) of drone propulsion and robotic joint actuators.

For engineers reviewing the DRV8304SRHAR datasheet, DRV8304SRHAR pinout, DRV8304SRHAR application, or DRV8304SRHAR equivalent, key selection criteria include its hardware-configurable PWM modes (1x/3x/6x/independent), integrated VDS overcurrent detection with programmable trip points (0.15–1.8 V), AUTOCAL offset calibration, and 40-pin VQFN package with exposed thermal pad for thermal management in compact motor-control PCBs.

Technical Context

The DRV8304SRHAR implements smart gate-drive (SGD) architecture with VGS hand-shake logic and minimum dead-time insertion (120 ns typical) to prevent shoot-through during N-channel MOSFET switching. Its integrated high-side doubler charge pump delivers 7–11.5 V gate drive across 6–38 V VM, while the low-side linear regulator supplies 3.3 V/30 mA for external logic.

It embeds three independent current-shunt amplifiers with bidirectional support, selectable gain (5/10/20/40 V/V), ±1.25 mV max input offset (at G=40, VREF=3.3 V), and 260–1550 ns settling time depending on gain setting - enabling precise phase-current sensing for FOC algorithms without external op-amps or discrete gain resistors.

Key Specifications

Pinout & Package

DRV8304SRHAR is housed in a 40-pin VQFN package (RHA suffix) with 0.4 mm pitch and an exposed thermal pad for enhanced power dissipation. Thermal resistance R_θJA = 35.1 °C/W enables reliable operation up to 125 °C ambient when properly mounted on a 2-layer PCB with thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV8305PAPR, DRV8304SRHAR offers simpler hardware-only configuration and lower BOM cost; compared with MP6532GQ-Z, it eliminates external high-side supply components and provides superior thermal protection granularity - making it optimal for space-constrained, self-contained motor modules.

Availability

DRV8304SRHAR is available at Aetrix Electronics and suitable for drone propulsion systems, robotic joint actuators, CPAP airflow control, smart appliance pumps, and BLDC motor modules requiring stable component supply and long-term production continuity.

Supply support for DRV8304SRHAR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in motor control ICs and power management solutions.

The DRV8304SRHAR belongs to TI's high-integration smart gate driver product line, designed specifically for compact, efficient, and reliable 3-phase BLDC motor control in consumer, medical, and industrial equipment.

FAQ

What is the maximum operating voltage for the DRV8304SRHAR?

The DRV8304SRHAR has an absolute maximum VM rating of 40 V, with recommended operation from 6 V to 38 V. Its charge pump supports high-side gate drive up to 11.5 V even at VM = 6 V, ensuring robust N-MOSFET switching across the full input range. This makes DRV8304SRHAR suitable for both 12 V and 24 V battery-powered systems.

How does the AUTOCAL feature work on the DRV8304SRHAR?

The AUTOCAL feature on the DRV8304SRHAR performs automatic offset calibration of its integrated current-shunt amplifiers. When the CAL pin is driven high, the device internally shorts the CSA inputs and measures residual offset, then applies correction to achieve <±1.25 mV error (at G=40). This occurs in hardware without MCU intervention, ensuring consistent current-sense accuracy across temperature and unit variance in DRV8304SRHAR-based designs.

Can the DRV8304SRHAR drive both high-side and low-side N-channel MOSFETs without external components?

Yes, the DRV8304SRHAR integrates a high-side charge pump (VCP) and low-side linear regulator to generate gate drive voltages for external N-channel MOSFETs. It delivers 7–11.5 V to high-side gates and 7.5–12.5 V to low-side gates - eliminating the need for external bootstrap capacitors, level shifters, or gate resistors. This full integration is confirmed in the DRV8304SRHAR datasheet Section 7.3.

What protection features are built into the DRV8304SRHAR?

The DRV8304SRHAR includes VM undervoltage lockout (UVLO), charge pump UVLO, MOSFET VDS overcurrent protection (OCP), shoot-through prevention, gate-driver fault detection, thermal warning (120–140 °C), and thermal shutdown (150–170 °C). All protections feed into the open-drain nFAULT pin, enabling immediate system-level response. These features are fully documented in Section 6.5 of the DRV8304SRHAR datasheet.

Is the DRV8304SRHAR pin-compatible with other devices in the DRV830x family?

No, the DRV8304SRHAR is not pin-compatible with SPI variants like DRV8305PAPR despite identical packaging - differences in pin function (e.g., nSCS/SCLK/SDI/SDO vs GAIN/IDRIVE/MODE) prevent direct substitution. However, the DRV8304SRHAR shares the same 40-pin VQFN (RHA) footprint and thermal pad layout as DRV8305PAPR, allowing mechanical compatibility with minor PCB redesign for signal routing.