Toshiba Semiconductor and Storage TB9058FNG,EL

Overview

TB9058FNG from Toshiba Electronic Devices & Storage Corporation is an AEC-Q100 qualified automotive DC servo motor driver IC with integrated LIN 1.3 slave interface, 1-channel H-bridge (R_on typ. = 2.2 Ω), 8-bit potentiometer ADC, and on-chip 5 V regulator. It executes closed-loop position control of brushed DC motors in vehicle HVAC actuators, throttle valves, and mirror adjusters using external potentiometer feedback and LIN command inputs.

For engineers reviewing the TB9058FNG datasheet, TB9058FNG pinout, TB9058FNG application, or TB9058FNG equivalent, this page delivers verified functional architecture, LIN baud rate configuration logic, H-bridge output behavior under emergency stop, potentiometer input impedance (2.5 MΩ pull-up), and thermal protection thresholds - all critical for automotive ECU integration and LIN network topology planning.

Technical Context

The TB9058FNG implements a dedicated LIN 1.3 slave protocol stack with hardware-level Synch Break/Field detection, ID parity validation (P0/P1), and enhanced checksum calculation over ID, DATA1, DATA2, and carry bits. Its internal 4 MHz oscillator enables stable timing for 2.4–19.2 kbps baud rates selected via SEL0/SEL1 pins.

Motor control logic compares 8-bit AD-converted potentiometer voltage (VPBR) against 8-bit target position (DATA1) to drive MT1/MT2 outputs in CW (MT1=H/MT2=L), CCW (MT1=L/MT2=H), or stopped (MT1=L/MT2=L) states. Protection includes ±1.5 A short-circuit current limit, overtemperature shutdown at T_j = 150 °C, and overvoltage detection at V_CC ≥ 26 V.

Key Specifications

Pinout & Package

Package: SSOP-24 (3.0 × 8.2 mm, 0.65 mm pitch), RoHS-compliant, AEC-Q100 qualified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive DC servo motor driver applications.

Compared with NCV7703B and RAA221000, the TB9058FNG uniquely integrates LIN 1.3 slave protocol, 8-bit potentiometer ADC, and H-bridge into one SSOP-24 package - reducing BOM count by 3–5 components and eliminating firmware development for basic position control loops.

Availability

TB9058FNG is available at Aetrix Electronics and suitable for automotive HVAC actuators, electronic throttle control units, and power mirror adjustment systems requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for TB9058FNG 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 automotive, industrial, and consumer applications, with core expertise in power management, motor control, and optical devices.

The TB9058FNG belongs to Toshiba's automotive LIN slave driver product line, engineered specifically for cost-sensitive, space-constrained brushed DC motor position control in vehicle body electronics where integration of communication, sensing, and drive functions reduces system complexity.

FAQ

What LIN protocol version does TB9058FNG implement?

TB9058FNG implements the LIN 1.3 Protocol Specification as a hardware slave node. It supports mandatory features including Synch Break/Field detection, ID parity (P0/P1), and enhanced checksum calculation over ID, DATA1, DATA2, and carry bits. The IC does not support LIN 2.x or later versions, and its protocol stack is fixed in silicon - no firmware update capability is provided. All timing parameters (e.g., 25,000 Tbit standby timeout) align strictly with LIN 1.3 conformance requirements.

How does TB9058FNG handle motor position feedback?

TB9058FNG uses its VPBR pin to read voltage from an external potentiometer connected across VREG and GND. An internal 8-bit ADC converts this analog signal with ≈7.5 ms latency after reset, providing position data used in real-time closed-loop control. The IC compares this value against the 8-bit target position (DATA1) received via LIN to determine CW, CCW, or stop states on MT1/MT2. No external ADC or microcontroller is required for basic position servo operation.

What protection mechanisms are built into TB9058FNG?

TB9058FNG integrates three primary protection mechanisms: (1) Driver short-circuit protection limits output current to ±1.5 A (typ.), triggering shutdown if exceeded; (2) Overtemperature protection disables outputs when junction temperature reaches 150 °C; (3) Overvoltage detection locks out operation if VCC exceeds 26 V (typ.). All protections are hardware-based with automatic recovery upon fault clearance - no software intervention required. These features ensure robust operation in harsh automotive environments.

Can TB9058FNG operate without an external microcontroller?

Yes, TB9058FNG operates autonomously as a standalone LIN slave node. It requires only an external potentiometer for position feedback and a 12 V motor supply - no external microcontroller is needed for core functions. The IC handles LIN communication, position comparison, H-bridge drive, and protection logic internally. External components are limited to passive filtering (e.g., 0.1 μF on VCC) and pull-up/down resistors for ID/SEL pins. This autonomy reduces system BOM and simplifies design for dedicated actuator applications.

What is the maximum number of TB9058FNG devices supported on a single LIN bus?

Up to 16 TB9058FNG devices can be connected as slaves on a single LIN bus. Each device is assigned a unique node ID (0–15) via hardware configuration of ID0–ID3 pins (open = 1, GND = 0). The LIN master communicates with individual slaves using their assigned IDs, and the TB9058FNG's hardware ID filter discards frames not matching its configured address. This scalability enables distributed actuator networks in modern vehicle architectures without bus contention or addressing conflicts.