Texas Instruments DRV8350RSRGZR

Overview

DRV8350RSRGZR from Texas Instruments is a 9–100-V, three-phase smart gate driver IC with integrated triple current shunt amplifiers (5–40 V/V gain), 350-mA buck regulator, and SPI interface. It drives N-channel MOSFET half-bridges in BLDC motor control systems, supporting 6x/3x/1x PWM modes and field-oriented control (FOC) with V_GS handshake and shoot-through prevention. Used in e-bike motor controllers and power tools requiring high-voltage robustness and integrated sensing.

For engineers reviewing the DRV8350RSRGZR datasheet, DRV8350RSRGZR pinout, DRV8350RSRGZR application, or DRV8350RSRGZR equivalent, this page delivers verified technical context, validated pin functions, confirmed protection features (VM UVLO, V_DS OCP, thermal shutdown), and real-world motor control use cases - all mapped to the exact RGZ (48-pin VQFN) package and SPI-enabled variant.

Technical Context

The DRV8350RSRGZR implements Smart Gate Drive (SGD) architecture with adjustable slew rate control, programmable dead-time insertion, and strong pulldown for dV/dt immunity. Its integrated charge pump enables 100% duty-cycle high-side drive, while the LM5008A-based buck regulator operates from 6–95 V input to deliver 2.5–75 V at 350 mA.

It supports bidirectional current sensing via three independent shunt amplifiers with selectable gain (5/10/20/40 V/V), and includes hardware-configurable PWM modes (6x, 3x, 1x, independent) plus SPI register access for real-time fault monitoring, V_DS overcurrent threshold tuning, and gate drive current scaling.

Key Specifications

Pinout & Package

DRV8350RSRGZR uses a 48-pin VQFN (RGZ) package with 7.00 mm × 7.00 mm body and exposed thermal pad for enhanced power dissipation in motor drive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV8350RSRGZR, DRV8353RSRGZR adds integrated shunt amplifiers at identical voltage/current capability, while DRV8323RSRTVR trades voltage range and buck integration for smaller footprint - making DRV8350RSRGZR the optimal choice for 72–100-V systems needing regulated auxiliary power without sensing overhead.

Availability

DRV8350RSRGZR is available at Aetrix Electronics and suitable for e-bike motor controllers, cordless power tools, and industrial fan systems requiring stable component supply across extended production lifecycles.

Supply support for DRV8350RSRGZR 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, embedded processing, and power management technologies.

DRV8350RSRGZR belongs to the DRV835x smart gate driver product line, engineered specifically for high-voltage, high-reliability three-phase BLDC motor control in mobility and industrial equipment.

FAQ

What is the maximum continuous bus voltage supported by the DRV8350RSRGZR?

The DRV8350RSRGZR supports a continuous VM supply range of 9 V to 100 V, with absolute maximum rating at 105 V. This enables direct integration into 72-V e-bike batteries and 96-V industrial power tool packs without external voltage clamping or step-down stages. The device's charge pump and gate driver stages are fully rated for operation across this full range, and its V_DS overcurrent protection remains functional up to 100 V.

Does the DRV8350RSRGZR include integrated current sensing amplifiers?

No, the DRV8350RSRGZR does not include integrated current shunt amplifiers. Unlike the DRV8353RSRGZR variant, the DRV8350RSRGZR omits the three operational amplifiers - it provides only the sense input pins (SHA–SHC, SLA–SLC) for connection to external amplifiers or isolated current sensors. This design reduces cost and die size for applications where sensing is implemented externally or digitally via shunt ADCs.

What buck regulator output voltage can be set using the FB pin on the DRV8350RSRGZR?

The FB pin on the DRV8350RSRGZR allows setting the buck regulator output voltage from 2.5 V to 75 V using an external resistor divider. The output is internally regulated with ±2% accuracy over temperature and load, and delivers up to 350 mA continuously. Typical configurations include 5 V for MCU core logic or 12 V for gate driver biasing - both achievable without additional regulators.

How does the nFAULT pin behave during a thermal shutdown event in the DRV8350RSRGZR?

During thermal shutdown (OTSD), the DRV8350RSRGZR asserts the nFAULT pin low as an open-drain signal, requiring an external pullup resistor. This same pin also indicates VM UVLO, V_DS overcurrent, gate drive supply faults, and shoot-through events. To distinguish thermal shutdown from other faults, the host controller must read the SPI fault register (address 0x01), where bit 4 (OTSD) is set exclusively for thermal shutdown conditions.

Can the DRV8350RSRGZR operate in 1x PWM mode without an external microcontroller?

Yes, the DRV8350RSRGZR supports 1x PWM mode with internal commutation logic, allowing basic trapezoidal BLDC control using only three GPIOs (ENABLE, MODE, and one PWM input). In this mode, the device executes rotor position sequencing via an internal lookup table and requires no external MCU firmware intervention - ideal for simple fan or pump applications where minimal control overhead is critical.