Texas Instruments DRV10963JJDSNT

Overview

DRV10963JJDSNT 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 per phase, features 180° sinusoidal control, and includes intelligent lock detection and anti-voltage surge (AVS) protection.

For engineers reviewing the DRV10963JJDSNT datasheet, DRV10963JJDSNT pinout, DRV10963JJDSNT application, or DRV10963JJDSNT equivalent, key selection considerations include its 10-pin USON 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 DRV10963JJDSNT implements a proprietary sensorless, window-less 180° sinusoidal commutation algorithm that eliminates torque ripple and enables silent operation in low-inertia fans. Its closed-loop control relies on back-EMF zero-crossing detection without Hall sensors or external timing components.

It integrates six N-channel power MOSFETs with total H+L R_DS(on) < 1.5 Ω, supports dynamic direction reversal via FR pin, and provides configurable spin-up parameters (align time, accelerate rate, handoff threshold) via OTP settings. Motor speed is reported via open-drain FG output with selectable toggle ratio (1×, 2×, or 3× electrical cycles) controlled by FGS and OTP bit FGOPT.

Key Specifications

Pinout & Package

DRV10963JJDSNT is housed in a 3.00 mm × 3.00 mm, 10-pin USON package with an exposed thermal pad on the bottom for enhanced heat dissipation in space-constrained fan modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV10974RTWR and MP6532DJ-LF-Z, the DRV10963JJDSNT delivers best-in-class acoustic performance and thermal efficiency for 5 V, low-power fan applications-leveraging its proprietary sinusoidal control, configurable lock detection, and AVS protection without requiring host communication or external sensing.

Availability

DRV10963JJDSNT is available at Aetrix Electronics and suitable for notebook CPU fan control, game station thermal management, and ASIC cooling applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for DRV10963JJDSNT 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 DRV10963JJDSNT belongs to TI's precision motor driver product line, engineered specifically for ultra-quiet, low-external-component-count cooling solutions in portable and compact electronic systems.

FAQ

What is the recommended minimum PCB copper area for the thermal pad of DRV10963JJDSNT?

The DRV10963JJDSNT thermal pad must be soldered to a minimum 30 mm² exposed copper area on the PCB, connected to GND with ≥4 thermal vias (0.3 mm diameter, filled or plated) to achieve the specified R_θJB of 15.8°C/W. Insufficient thermal relief increases junction temperature beyond 125°C under 500 mA load, triggering thermal shutdown and disrupting fan operation. Always verify thermal performance using the layout guidelines in SLAS955A Section 10.2.

Can the DRV10963JJDSNT drive a 4-wire brushless fan with tachometer and PWM inputs?

Yes, the DRV10963JJDSNT is fully compatible with standard 4-wire BLDC fans: its PWM pin accepts the industry-standard 25 kHz PWM speed command signal, and its open-drain FG pin outputs a tachometer signal synchronized to motor rotation. The FGS pin allows configuration of FG toggle ratio to match the fan's pole-pair count, ensuring accurate RPM reporting to the host system. No level-shifting or external conditioning is required.

How does the DRV10963JJDSNT handle motor startup under high static load, such as a dusty or obstructed fan?

The DRV10963JJDSNT employs five independent lock detection schemes-including Open Loop Stuck and BEMF Abnormal-to identify stalled conditions during startup. If obstruction is detected, it halts drive, activates AVS to dissipate inductive energy safely to ground, waits TOFF_LOCK (5 s), then retries spin-up with the same OTP-configured align time and accelerate rate. This prevents MOSFET overheating and ensures reliable recovery without host intervention.

Is the FG output of DRV10963JJDSNT compatible with 3.3 V microcontrollers?

Yes, the FG pin is an open-drain output rated for 7.5 V max, allowing direct connection to 3.3 V MCU GPIOs with a 4.7 kΩ pull-up to 3.3 V. Its sink current capability (5 mA typical at 0.3 V) ensures clean logic-low transitions, and built-in short-circuit protection (ISC_FG = 13–25 mA) safeguards against accidental VCC shorts. No additional buffering or voltage translation is needed for 3.3 V system interfacing.

What is the impact of setting MINOP_DC[1:0] = 3 (13% minimum duty cycle) on DRV10963JJDSNT fan behavior?

Setting MINOP_DC[1:0] = 3 configures the DRV10963JJDSNT to maintain minimum 13% PWM duty cycle during active operation-preventing unintended shutdown at low speeds. Below 13%, output is clamped at 13%; below 1.5%, the device enters sleep mode (15 µA). This setting improves low-speed stability in high-friction fans but reduces minimum controllable RPM. It is factory-programmed and cannot be altered in-circuit.