STMicroelectronics L6460TR

Overview

L6460TR from STMicroelectronics is a highly configurable SPI-controlled multi-motor driver IC integrating four full-bridge power stages, dual buck regulators, battery charging capability, 9-bit ADC, two op-amps, digital comparator, and 14 GPIOs. It supports simultaneous driving of up to two DC motors and one stepper motor (with 1/16 microstepping), operates from 13 V to 38 V, and delivers R_DS(on) of 0.60 Ω (bridges 1–2) and 0.85 Ω (bridges 3–4). It is used in industrial automation motion control systems requiring compact, integrated motor + power + sensing functionality.

For engineers reviewing the L6460TR datasheet, L6460TR pinout, L6460TR application, or L6460TR equivalent, key selection considerations include its programmable bridge configuration modes (full/half/super/switch), integrated power sequencing with fault signaling, low-power hibernate mode (~35 mW), and SPI-configurable motor control registers for stepper microstepping and current DAC tuning.

Technical Context

The L6460TR implements a hierarchical motor control architecture: bridges 1–2 are optimized for high-current DC motor drive or super-bridge parallel operation, while bridges 3–4 support stepper motor commutation (bipolar, 1/16 microstep), synchronous buck regulation (bridge 3), and battery charging or secondary switching regulation (bridge 4). Its internal supervisory system includes thermal warning/shutdown, overcurrent protection, and undervoltage lock-out, all reportable via SPI or nRESET pin.

Power management integrates three independent regulators: a linear main regulator (V_SupplyInt), a switching buck regulator, and a switching regulator controller - enabling flexible external supply design. The device uses an internal oscillator and supports multiple start-up modes (slave/master/single) determined by hardware pins, with full configuration retained in nonvolatile registers after power cycle.

Key Specifications

Pinout & Package

TQFP64 exposed pad package (10 mm × 10 mm, 0.5 mm pitch) with 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 multi-motor driver applications.

Compared with TB6600HG and DRV8711, the L6460TR uniquely integrates motor drive, power conversion, analog sensing, and supervisory functions in one TQFP64 package - reducing total system component count by up to 12 discrete ICs and simplifying functional safety validation for Class B motion control.

Availability

L6460TR is available at Aetrix Electronics and suitable for industrial CNC positioning, automated guided vehicle (AGV) drive, medical infusion pumps, and smart home HVAC actuators requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for L6460TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP portfolios and vertical manufacturing capabilities.

The L6460TR belongs to ST's high-integration motor control IC product line, designed specifically for space-constrained multi-motor systems requiring embedded intelligence, power efficiency, and functional safety-ready features - not just raw drive capability.

FAQ

What motor configurations does the L6460TR support?

The L6460TR supports multiple hardware-configurable topologies: two DC motors plus one stepper motor, four independent DC motors, or hybrid modes where bridges 3–4 operate as buck regulators or battery chargers. Configuration is set at startup via dedicated pins and can be modified dynamically via SPI registers without reset.

Does the L6460TR require external current sense resistors?

No - the L6460TR integrates a 9-bit ADC with 16-channel multiplexer and supports internal current sensing through its bridge voltage drop measurement feature. External shunts are optional for higher accuracy but not required for basic overcurrent protection or closed-loop control.

How is thermal protection implemented?

Thermal protection includes both warning and shutdown thresholds. A thermal warning flag is asserted via SPI status register at 125 °C, allowing firmware to reduce load before shutdown. Full thermal shutdown activates at 150 °C, forcing all bridges into high-impedance state and asserting nRESET. Both events are latched until cleared via SPI command or power cycle.

Can the L6460TR operate from a 24 V nominal supply?

Yes - the L6460TR is rated for 13 V to 38 V operation, making it fully compatible with standard 24 V industrial DC bus systems. Its internal regulators (linear and switching) maintain stable 3.3 V and 5 V outputs across this range, and bridge R_DS(on) remains within specification up to 38 V maximum.