Texas Instruments DRV10963JUDSNT

Overview

DRV10963JUDSNT from Texas Instruments is a three-phase, sensorless BLDC motor driver IC with integrated power MOSFETs, designed for ultra-quiet CPU fan applications. It operates from 2.1 V to 5.5 V, delivers up to 500 mA output current, features 180° sinusoidal control, and integrates lock detection, short-circuit protection, and anti-voltage surge (AVS) functionality.

For engineers reviewing the DRV10963JUDSNT datasheet, DRV10963JUDSNT pinout, DRV10963JUDSNT application, or DRV10963JUDSNT equivalent, key selection considerations include its USON-10 package thermal performance, FG/FGS speed feedback configuration, PWM-based amplitude control resolution (0.2%), and OTP-configurable spin-up parameters (HOffth, TAlign, RAcc) for reliable motor start-up across diverse fan loads.

Technical Context

The DRV10963JUDSNT implements a proprietary sensorless, window-less 180° sinusoidal commutation scheme that minimizes torque ripple and acoustic noise. Its control loop dynamically estimates back-EMF without Hall sensors or external components, enabling closed-loop operation after open-loop spin-up.

It integrates six N-channel power MOSFETs with total H+L R_DS(on) < 1.5 Ω, supports direction reversal via FR pin, and provides configurable FG output toggling (1×, 2×, or 3× per electrical cycle) based on FGS state and OTP setting FGOPT. Lock detection employs five independent schemes-including frequency overflow, BEMF abnormality, and speed abnormality-to ensure robust stall recovery.

Key Specifications

Pinout & Package

DRV10963JUDSNT is housed in a 3.00 mm × 3.00 mm, 10-pin USON (DSN) package with an exposed thermal pad on the bottom, requiring connection to PCB ground for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV10963JUDSNT, DRV10970RGER offers higher voltage/current headroom but lacks OTP-configurable spin-up tuning for low-voltage fans, while MP6532DJ-LF-Z shifts complexity to firmware and removes integrated protection features-making DRV10963JUDSNT optimal for cost-sensitive, drop-in 5 V fan replacements requiring zero firmware development.

Availability

DRV10963JUDSNT is available at Aetrix Electronics and suitable for notebook CPU fans, game station cooling systems, and ASIC thermal management requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for DRV10963JUDSNT 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, with decades of expertise in motor control ICs.

The DRV10963JUDSNT belongs to TI's low-voltage, integrated BLDC driver product line, engineered specifically for ultra-quiet, high-efficiency cooling in space-constrained portable and consumer electronics.

FAQ

What is the recommended decoupling capacitor for DRV10963JUDSNT VCC pin?

A minimum 2.2 µF X5R/X7R ceramic capacitor placed within 2 mm of the VCC pin is required per the datasheet. This value ensures stable operation during PWM transients and prevents UVLO triggering. Additional 0.1 µF local bypass is recommended. The DRV10963JUDSNT datasheet specifies this as mandatory for reliable motor start-up and noise immunity.

Can the DRV10963JUDSNT operate with a 3.3 V supply?

Yes, the DRV10963JUDSNT supports 2.1 V to 5.5 V input, making it fully compatible with 3.3 V systems. At 3.3 V, the align duty cycle automatically adjusts to ~60% (per Table 2), ensuring sufficient torque for fan start-up. All logic thresholds (e.g., VIH_PWM = 2.3 V) remain valid, and FG output remains functional with appropriate pull-up.

How does the DRV10963JUDSNT handle motor lock conditions?

The DRV10963JUDSNT employs five independent lock detection schemes-including frequency overflow (>3 kHz), BEMF abnormality, and speed abnormality-and responds by placing motor phases in high-impedance state, activating AVS, and attempting automatic restart after TOFF_LOCK (5 s). This behavior is fully hardware-implemented and requires no external intervention. The DRV10963JUDSNT design ensures safe thermal and electrical recovery without MCU involvement.

Is the FG output of DRV10963JUDSNT compatible with 1.8 V microcontrollers?

Yes, the FG pin is open-drain and can be pulled up to any voltage between 1.8 V and 5.5 V. When using a 1.8 V pull-up, the output low voltage (VOL) remains ≤0.3 V at 5 mA sink current, satisfying 1.8 V logic low thresholds. The DRV10963JUDSNT datasheet confirms interoperability with mixed-voltage systems via externally selectable pull-up.

What is the purpose of the FGS pin on DRV10963JUDSNT?

The FGS pin selects the FG output toggle rate: when FGS = 1, FG toggles once per electrical cycle; when FGS = 0, the rate depends on OTP setting FGOPT (1× or 2× per cycle). This latched configuration allows mechanical RPM calculation using motor pole-pair count. The DRV10963JUDSNT uses FGS exclusively for this static configuration-no dynamic reconfiguration is supported after power-up.