Texas Instruments DRV10963JUDSNR

Overview

DRV10963JUDSNR 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 includes intelligent lock detection and anti-voltage surge (AVS) protection.

For engineers reviewing the DRV10963JUDSNR datasheet, DRV10963JUDSNR pinout, DRV10963JUDSNR application, or DRV10963JUDSNR equivalent, key selection criteria include its USON-10 thermal package, FG/FGS speed feedback configuration, PWM-based amplitude control with 0.2% resolution, and integrated protection against lock, short circuit, UVLO, and thermal overload.

Technical Context

The DRV10963JUDSNR implements a proprietary sensorless, window-less 180° sinusoidal commutation scheme that minimizes torque ripple and acoustic noise. Its closed-loop operation relies on back-EMF zero-crossing detection without Hall sensors or external position feedback.

Motor start-up uses configurable open-loop alignment (TAlign), acceleration rate (RAcc), and handoff threshold (HOffth) before transitioning to closed-loop control. Direction is controlled dynamically via the FR pin, and speed is set by a 9-bit PWM duty cycle input (15–100 kHz range) with programmable minimum operating thresholds (5%, 10%, 13%, or none).

Key Specifications

Pinout & Package

The DRV10963JUDSNR is housed in a 3.00 mm × 3.00 mm, 10-pin USON (Ultra Thin Small Outline No-lead) package with an exposed thermal pad on the bottom requiring connection to PCB ground for 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 DRV10963JUDSNR, DRV10970PWP offers higher current and voltage headroom but larger footprint and no USON thermal efficiency, while MP6532DJ-LF-Z provides greater peak drive capability at the cost of losing autonomous lock recovery and OTP-configurable startup behavior.

Availability

DRV10963JUDSNR is available at Aetrix Electronics and suitable for notebook CPU fans, game console cooling systems, and ASIC/FPGA thermal management requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for DRV10963JUDSNR 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 high-reliability power management solutions for industrial, automotive, and computing markets.

The DRV10963JUDSNR belongs to TI's precision motor driver product line, engineered specifically for low-noise, low-component-count, sensorless BLDC fan control in portable and thermally sensitive computing platforms.

FAQ

What is the recommended PCB layout practice for thermal management of the DRV10963JUDSNR?

The DRV10963JUDSNR requires the exposed thermal pad on the underside of its USON-10 package to be soldered to a solid copper ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner or bottom-layer ground. This achieves the specified R_θJB = 15.8 °C/W and prevents junction temperature exceedance above 125°C under 500-mA continuous load. Avoid floating or undersized pads.

How does the DRV10963JUDSNR implement sensorless commutation without Hall effect sensors?

The DRV10963JUDSNR uses back-EMF zero-crossing detection during active phase intervals to estimate rotor position. It applies a proprietary window-less 180° sinusoidal control algorithm that continuously monitors induced voltages on undriven phases, enabling smooth, ultra-quiet rotation without external position sensors or timing windows-critical for fan applications where acoustic noise must be minimized.

Can the DRV10963JUDSNR drive motors with different pole pair counts, and how is RPM calculated from the FG signal?

Yes-the DRV10963JUDSNR supports any BLDC motor; RPM is derived from FG frequency using motor-specific pole pair count (PP). With FGS = 1, RPM = (FREQ_FG × 60)/PP; with FGS = 0 and FGOPT = 1, RPM = (FREQ_FG × 120)/PP; and with FGS = 0 and FGOPT = 0, RPM = (FREQ_FG × 180)/PP. The FG output toggles per 1, 2, or 3 electrical cycles depending on OTP and FGS state.

What protection features are integrated into the DRV10963JUDSNR, and how do they respond to faults?

The DRV10963JUDSNR integrates lock detection (five independent schemes), short-circuit protection (>1.8 A), thermal shutdown (160°C), UVLO (2.1 V), and anti-voltage surge (AVS). Upon lock or short-circuit detection, it places motor phases in high-impedance state, activates AVS to route inductive energy to GND, and attempts auto-restart after TOFF_LOCK (5 s) or fault clearance-no external reset required.

Is the DRV10963JUDSNR pin-compatible with other devices in the DRV109xx family, such as DRV10970 or DRV10983?

No-DRV10963JUDSNR is not pin-compatible with DRV10970 (16-pin HTSSOP) or DRV10983 (10-pin USON but different pin mapping and feature set). Its USON-10 pinout is unique to the DRV10963 family variant; substitution requires PCB redesign. Always verify pin functions and thermal pad connections before replacement.