Toshiba Semiconductor and Storage TBD62781AFWG,EL

Overview

TBD62781AFWG,EL from Toshiba Electronic Devices & Storage Corporation is an 8-channel source-type DMOS transistor array IC designed for high-voltage, medium-current switching in industrial and automotive control systems. It delivers up to 50 V output voltage, −400 mA per channel (at 25°C), and features built-in pull-down resistors at outputs. Its P-SOP18 package supports compact PCB layouts in relay drivers, LED matrix controllers, and solenoid interface circuits.

For engineers reviewing the TBD62781AFWG,EL datasheet, TBD62781AFWG,EL pinout, TBD62781AFWG,EL application, or TBD62781AFWG,EL equivalent, key selection criteria include per-channel current capability under thermal derating, input logic threshold compatibility with 3.3 V/5 V microcontrollers, output ON-resistance at rated load, and thermal dissipation limits on standard FR-4 PCBs.

Technical Context

The TBD62781AFWG,EL integrates eight independent N-channel DMOS transistors in a single monolithic BiCD silicon die, each with a dedicated input and open-drain source-output configuration. Each channel includes a built-in pull-down resistor to ensure defined low-state behavior when inactive.

It operates with a wide VCC range (−0.5 V to 50 V), accepts TTL/CMOS-compatible inputs (VIN(ON) ≥ 2.0 V, VIN(OFF) ≤ 0.6 V), and exhibits fast switching (tON = 0.4 μs, tOFF = 2.0 μs) under 50 V supply and 125 Ω load conditions. No internal overcurrent or overvoltage protection is included - external fusing and layout-level fault mitigation are mandatory.

Key Specifications

Pinout & Package

P-SOP18-0812-1.27-001 surface-mount package: 18-pin, 1.27 mm pitch, 11.0 × 7.0 × 2.05 mm body, 0.48 g typical weight. Exposed thermal pad recommended for heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage DMOS array applications.

Compared with TBD62781AFWG,EL, TBD62783AFWG,EL offers identical form factor but trades lower conduction loss for higher thermal resistance, while ULN2803ADWR provides proven robustness in non-PWM applications at the expense of efficiency and bandwidth.

Availability

TBD62781AFWG,EL is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and printer peripheral design requiring stable component supply and long-lifecycle support.

Supply support for TBD62781AFWG,EL 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 is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and storage solutions with over 50 years of analog and mixed-signal design heritage.

The TBD62781AFWG,EL belongs to Toshiba's BiCD DMOS transistor array product line, engineered for high-reliability industrial switching where voltage tolerance, channel density, and thermal predictability are prioritized over ultra-low quiescent current.

FAQ

What is the maximum continuous output current per channel for TBD62781AFWG,EL at 85°C ambient?

The TBD62781AFWG,EL supports −370 mA per channel at Ta = 85°C with 10% duty cycle and Tj = 120°C (P-SOP18 package on specified PCB). This derated value accounts for thermal resistance and ensures safe junction temperature. For continuous DC operation at 85°C, limit current to ≤−160 mA per channel per datasheet Table 3. Always verify actual board-level thermal performance using IR imaging or thermocouple measurement.

Does TBD62781AFWG,EL include internal ESD or overvoltage protection?

No, the TBD62781AFWG,EL does not incorporate internal ESD protection diodes, overvoltage clamps, or overcurrent limiting circuitry. The absolute maximum ratings define hard limits - exceeding VCC > 50 V or IOUT > −500 mA risks immediate failure. System-level protection (TVS diodes on VCC, series resistors on inputs, fuse on VCC rail) is mandatory per Toshiba's usage precautions.

Can TBD62781AFWG,EL drive inductive loads like relays or solenoids directly?

Yes, the TBD62781AFWG,EL is qualified for inductive load switching, but external flyback diodes must be placed across each load (cathode to VCC, anode to output pin) to suppress back-EMF. Toshiba explicitly warns that unclamped inductive kick can exceed VCC rating and destroy the DMOS channel. Layout must minimize loop inductance between output pin, diode, and load.

Is the TBD62781AFWG,EL pin-compatible with the through-hole TBD62781APG variant?

No, the TBD62781AFWG,EL (P-SOP18) and TBD62781APG (P-DIP18) share identical pin functions and numbering but differ in physical package, pitch (1.27 mm vs. 2.54 mm), and thermal characteristics. They are functionally equivalent but not mechanically interchangeable - PCB redesign is required to swap between them.

What is the recommended minimum input voltage to guarantee reliable turn-on of TBD62781AFWG,EL?

The TBD62781AFWG,EL guarantees turn-on when VIN ≥ 2.0 V (min) under test condition IOUT ≥ −100 mA and VDS = 2.0 V. For robust operation across voltage and temperature variation, design with VIN ≥ 2.5 V. Input current remains ≤0.1 mA, so standard MCU GPIOs can drive it directly without buffer stages.