Toshiba Semiconductor and Storage TB67S112PG,HJ

Overview

TB67S112PG from Toshiba Electronic Devices & Storage Corporation is a parallel-input, dual-channel sink-type solenoid driver IC fabricated in BiCD process. It delivers 50 V output voltage and 1.5 A/channel (absolute max), with integrated thermal shutdown, overcurrent detection, and UVLO protection - used in industrial valve control, pneumatic actuators, and relay replacement circuits.

For engineers reviewing the TB67S112PG datasheet, TB67S112PG pinout, TB67S112PG application, or TB67S112PG equivalent, key selection criteria include its 0.3 Ω (typ.) output MOSFET on-resistance, dual-channel independent control via IN1/IN2, open-drain ERR fault reporting, and DIP-16 package suitability for high-current discrete actuator interfaces.

Technical Context

The TB67S112PG implements two independent N-channel power MOSFET output stages with built-in current-sense and thermal monitoring. Each channel features automatic recovery after overcurrent (ISD) or thermal shutdown (TSD) events, with configurable blanking times (1.25 μs ISD mask, 2–8 μs TSD mask) to suppress switching noise false triggers.

Its logic interface accepts standard TTL/CMOS-level inputs (VIN(H) ≥ 2.0 V, VIN(L) ≤ 0.8 V) with 100–300 mV hysteresis, while the ERR pin provides open-drain fault signaling requiring external pull-up (10–100 kΩ). The device operates across VM = 4.5–47 V and supports unipolar stepper motor drive when paired with a second TB67S112PG.

Key Specifications

Pinout & Package

Package: DIP16-P-300-2.54A (16-pin dual in-line, 2.54 mm pitch, 1.11 g typical weight).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solenoid driver applications.

Compared with TB67H301FNG and TPIC2603DWR, the TB67S112PG offers balanced performance for fixed-function parallel-driven solenoids: it delivers 1.5 A at 50 V in a through-hole DIP-16 package with full protection integration - eliminating external components needed by TPIC2603DWR and avoiding the complexity of SPI configuration required by TB67H301FNG.

Availability

TB67S112PG is available at Aetrix Electronics and suitable for industrial valve control, pneumatic actuator interface, relay replacement modules, and unipolar stepper motor drive applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TB67S112PG 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 power management, motor driver, and analog ICs for industrial, automotive, and consumer applications.

The TB67S series targets robust, cost-effective solenoid and unipolar stepper control in factory automation and equipment - emphasizing integrated protection, high-voltage tolerance, and simplified PCB layout with multiple ground pins.

FAQ

What is the maximum continuous output current per channel for the TB67S112PG?

The TB67S112PG has an absolute maximum output current rating of 1.5 A per channel. In continuous operation at Ta = 25°C, the recommended maximum is 0.75–1.5 A depending on PCB thermal design; derating applies above 25°C (21.6 mW/°C on standard 50 mm × 50 mm board). The TB67S112PG integrates overcurrent detection that triggers at 2.1–5.0 A to protect against short-circuit faults.

How does the ERR pin function on the TB67S112PG?

The ERR pin on the TB67S112PG is an open-drain N-channel MOSFET output that pulls low only during thermal shutdown (TSD). During normal operation, it remains in high-impedance (Hi-Z) state. To use this signal, an external pull-up resistor (10–100 kΩ to VIN(H)) is required. The TB67S112PG does not drive ERR high actively - it relies on the external pull-up to indicate fault-free status.

Can the TB67S112PG drive a unipolar stepper motor alone?

No, a single TB67S112PG cannot fully drive a standard 4-wire unipolar stepper motor. It provides only two sink outputs (OUT1/OUT2), whereas unipolar stepper control requires independent switching of all four phase coils. The datasheet explicitly states that "two chips" are needed - meaning two TB67S112PG ICs - to achieve full 4-phase sequencing for unipolar stepper operation.

What is the purpose of the COM pin on the TB67S112PG?

On the TB67S112PG, the COM pin serves as the common return path for solenoid or coil loads. It connects internally to the source terminals of the output MOSFETs and must be tied either directly to VM (for basic operation) or to a zener-clamped node (to absorb back-EMF energy). Proper COM routing is critical: incorrect connection can cause output failure or damage, as specified in Toshiba's mounting guidelines.

Does the TB67S112PG require external flyback diodes for inductive loads?

No, the TB67S112PG integrates internal regenerative diodes across each output stage, with a forward voltage of 0.5–1.5 V at 1.5 A. These diodes provide freewheeling paths for inductive kickback during turn-off. However, for high-energy loads (e.g., large solenoids or motors), external zener clamping between COM and VM is still recommended to limit voltage overshoot beyond the 50 V rating - as noted in the application circuit example.