Toshiba Semiconductor and Storage TC78B015FTG,EL

Overview

TC78B015FTG from Toshiba Electronic Devices & Storage Corporation is a 3-phase brushless DC motor driver IC with 150-degree trapezoidal PWM chopper control, Hall-sensor interface for single-sensor operation, 22 V operating supply, 3 A output current capability, and integrated protection circuits including overcurrent (ISD), thermal shutdown (TSD), and under-voltage lockout (UVLO). It enables precise speed regulation in compact BLDC motor systems such as fans, pumps, and small appliances.

For engineers reviewing the TC78B015FTG datasheet, TC78B015FTG pinout, TC78B015FTG application, or TC78B015FTG equivalent, this page delivers verified functional architecture, validated pin-level circuit roles, confirmed motor-control timing behavior (DC excitation → forced commutation → 150° PWM drive), and real-world selection guidance for 1-sensor BLDC systems requiring soft switching, adjustable lead angle, and FG/lock detection outputs.

Technical Context

The TC78B015FTG implements a three-phase full-wave drive architecture with configurable 150-degree commutation logic, supporting Hall-element or Hall-IC inputs via differential U-phase terminals (HUP/HUM) with ±8 mV hysteresis and 0.5–3.5 V common-mode range. Its startup sequence executes DC excitation (configurable via TIP capacitor), followed by forced commutation (frequency set by FST terminal), then transitions to closed-loop 150° PWM drive upon position signal validation.

Motor control parameters are dynamically configured through analog voltage inputs: rotational speed command (TSP/VSP), minimum duty (MIN_SP), lead angle (LA with SEL_LA), FG division ratio (SEL_FG), and PWM frequency (FPWM). Internal oscillator (13 MHz typ., set by OSCCR resistor/capacitor) governs timing for commutation, while VREG provides a regulated 5 V reference (±0.3 V) for external biasing and internal logic.

Key Specifications

Pinout & Package

Package: P-WQFN36-0505-0.50-001 (36-pin, 5 mm × 5 mm, 0.5 mm pitch, exposed E-PAD for thermal dissipation). The E-PAD must be soldered to a GND plane for thermal management and electrical grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase BLDC motor driver applications.

Compared with DRV10983ZRTVR and BD63002MUV, the TC78B015FTG uniquely combines single-Hall support with auto lead angle, four selectable FG ratios, and comprehensive protection - making it optimal for space-constrained, high-diagnostic BLDC systems where reliability and tuning flexibility outweigh raw power density.

Availability

TC78B015FTG is available at Aetrix Electronics and suitable for computer cooling fans, automotive HVAC blowers, home appliance pumps, and industrial small conveyors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TC78B015FTG 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 high-reliability semiconductor solutions for motor control, power management, and interface applications, with decades of expertise in silicon monolithic ICs for industrial and consumer systems.

The TC78B015FTG belongs to Toshiba's dedicated BLDC motor driver family engineered for single-Hall sensor operation in compact, thermally constrained applications - emphasizing diagnostic completeness, startup robustness, and field-tunable commutation parameters.

FAQ

What is the maximum motor supply voltage supported by the TC78B015FTG?

The TC78B015FTG supports a motor supply voltage (VM) of 6–22 V in normal operation, with an absolute maximum rating of 25 V. Exceeding 22 V risks violating safe operating area limits under load, while operation below 6 V may prevent proper startup or cause UVLO activation. The TC78B015FTG includes under-voltage lockout that disables outputs until VM rises above 5.3 V and remains stable.

How does the TC78B015FTG handle motor startup with a single Hall sensor?

The TC78B015FTG executes a deterministic three-stage startup: DC excitation (duration set by TIP capacitor), forced commutation (frequency set by FST pin), then transition to 150-degree PWM drive once Hall signal frequency exceeds the FST threshold. This sequence ensures reliable rotor alignment and avoids indefinite stall, even with weak or noisy Hall signals - a core capability of the TC78B015FTG.

Can the TC78B015FTG drive motors without a Hall sensor?

No - the TC78B015FTG requires a Hall sensor input on HUP/HUM for rotor position detection and is not designed for sensorless (BEMF-based) operation. Its architecture, timing charts, and protection logic assume valid Hall edge transitions; removing the Hall sensor will prevent startup and trigger lock detection. For sensorless alternatives, consider the TC78H660FNG or DRV10983ZRTVR.

What is the purpose of the VREG pin on the TC78B015FTG?

The VREG pin on the TC78B015FTG outputs a regulated 5.0 V ±0.3 V reference (at −40 mA load) used to bias external components like the ILIM current-limit resistor, OSCCR timing network, Hall sensors, and voltage-divider networks for MIN_SP or LA. A 0.1 μF capacitor between VREG and SGND is mandatory for stability, as specified in the TC78B015FTG datasheet.

How is motor lock detection implemented in the TC78B015FTG?

The TC78B015FTG detects motor lock by monitoring Hall signal transitions during forced commutation or 150° drive. If no edge occurs within Ton (configurable via SEL_LD: 0.5 s or 1 s), LD_OUT goes low and outputs halt. Recovery requires either a 0% duty command for ≥2 ms or power cycle. This behavior is fully documented for the TC78B015FTG and integrates with external fault-handling logic via LD_OUT.

Does the TC78B015FTG support bidirectional rotation, and how is direction controlled?

Yes - the TC78B015FTG supports forward/reverse rotation via the CW/CCW pin: logic low enables clockwise (U→V→W), high enables counterclockwise (W→V→U). Direction changes during 150° drive trigger reverse brake until Hall frequency drops ≤40 Hz, then execute DC excitation → forced commutation → new-direction 150° drive. This ensures safe, jerk-free reversal - a defined feature of the TC78B015FTG.