Toshiba Semiconductor and Storage TB6586BFG,EL,DRY

Overview

TB6586BFG,EL,DRY from Toshiba Electronic Devices & Storage Corporation is a three-phase full-wave brushless motor controller IC designed for low-speed motor fan applications. It integrates Hall amplifiers, triangular-wave PWM generation, 120°/150° selectable energization, built-in 5 V regulator (35 mA), and overcurrent protection with 0.5 V threshold on RS pin.

For engineers reviewing the TB6586BFG,EL,DRY datasheet, TB6586BFG,EL,DRY pinout, TB6586BFG,EL,DRY application, or TB6586BFG,EL,DRY equivalent, key selection considerations include bootstrap-supported high-side drive capability, FG pulse count select (1 or 3 ppr), lead angle correction via analog LA input (0–5 V), and minimum ON duty of 0.6 μs for precise low-speed commutation control.

Technical Context

The TB6586BFG,EL,DRY implements a Hall-sensor-based commutation engine with dual energization modes (120° or 150°) selected via RESET pin voltage level (≤0.8 V or ≥6.35 V). Its internal oscillator sets carrier frequency (16.2–22 kHz) using external RC network on OSC/R and OSC/C pins.

It features integrated Hall differential amplifiers with ±7.5 mV hysteresis and 1.6 μs digital filtering, plus real-time lead angle correction (0°–28° in 16 steps) driven by analog LA input referenced to Vrefout. The FG output supports configurable pulses-per-revolution (1 or 3 per electrical 360°) via FGC pin logic level.

Key Specifications

Pinout & Package

P-SSOP24-0613-1.00-001: 24-pin plastic shrink small outline package (0.65 mm pitch), 8.6 × 7.8 × 1.7 mm body, gull-wing leads, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN32F0A and MP6532GQ-Z, the TB6586BFG,EL,DRY delivers optimized analog-domain Hall processing, hardware-selectable energization, and bootstrap-timed refresh - making it ideal for cost-sensitive, high-volume fan modules where deterministic timing and minimal external components are critical.

Availability

TB6586BFG,EL,DRY is available at Aetrix Electronics and suitable for CPU cooler fan control, server chassis fan modules, industrial blower systems, and automotive HVAC fan applications requiring stable component supply and long-term production continuity.

Supply support for TB6586BFG,EL,DRY 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor solutions for industrial, automotive, and consumer applications, with core expertise in power management and motor control ICs.

The TB6586BFG,EL,DRY belongs to Toshiba's BLDC motor controller product line, engineered specifically for low-noise, low-speed fan applications where Hall-based commutation, bootstrap gate drive, and integrated analog peripherals reduce system-level design complexity.

FAQ

What is the function of the RESET pin on the TB6586BFG,EL,DRY?

The RESET pin on the TB6586BFG,EL,DRY selects the motor energization mode: applying ≤0.8 V enables 150° conduction for smoother torque, while ≥6.35 V selects 120° conduction for higher efficiency. At intermediate voltages, the device remains in reset state with all outputs disabled. This hardware-selectable feature allows configuration without MCU firmware changes, and the internal counter continues operating during reset to maintain FG output continuity.

How does the TB6586BFG,EL,DRY support bootstrap gate drive for high-side MOSFETs?

The TB6586BFG,EL,DRY supports bootstrap gate drive through its dedicated UL/VL/WL low-side outputs and UH/VH/WH high-side outputs, combined with internal timing that enables controlled low-side refresh cycles. When VSP is set between 1.0 V and 2.1 V, the IC outputs fixed-duty ON signals to UL/VL/WL while keeping UH/VH/WH low - charging external bootstrap capacitors. This eliminates the need for external charge pumps and simplifies high-side gate drive design in three-phase BLDC systems.

Can the TB6586BFG,EL,DRY operate without an external crystal or resonator?

Yes, the TB6586BFG,EL,DRY operates without an external crystal or resonator. It uses an internal oscillator whose frequency is set by an external RC network connected to OSC/R (Pin 13) and OSC/C (Pin 12). Typical values - 9.1 kΩ resistor and 390 pF capacitor - yield a 5 MHz oscillation frequency, which is divided internally to generate the 19.8 kHz PWM carrier. This RC-based timing eliminates BOM cost and layout complexity associated with crystals while maintaining sufficient stability for fan-speed control.

What is the purpose of the FGC pin on the TB6586BFG,EL,DRY?

The FGC pin on the TB6586BFG,EL,DRY selects the number of pulses per electrical revolution generated at the FG output: logic High yields one pulse per 360° electrical angle (ideal for coarse speed monitoring), while logic Low or open yields three pulses per 360° (enabling finer RPM resolution). This selection is implemented entirely in hardware, allowing tachometer granularity to be configured at board level without firmware modification - supporting both simple speed feedback and more precise closed-loop control schemes.

Does the TB6586BFG,EL,DRY include overvoltage or thermal protection?

The TB6586BFG,EL,DRY includes VCC undervoltage lockout (activation at 5.0 V, release at 6.0 V) and overcurrent protection triggered at 0.5 V on the RS pin, but it does not integrate thermal shutdown or overvoltage clamp circuitry. Protection relies on external design: proper heatsinking per Rth(j-a) = 125°C/W, use of fuse-rated power supplies, and inclusion of flyback diodes or TVS devices on motor power lines to suppress back-EMF transients. These omissions reflect its role as a controller IC - external power stages must implement full fault coverage.