Diodes Incorporated DMC4050SSDQ-13

Overview

DMC4050SSDQ from Diodes Incorporated is a 40V complementary pair enhancement-mode MOSFET in SO-8 package, integrating matched N-channel (45 mΩ @ 10 V) and P-channel (45 mΩ @ −10 V) devices for half-bridge or H-bridge switching. It delivers 5.8 A continuous drain current per channel at +25°C and is qualified to AEC-Q101 for automotive-grade reliability in motor control and backlighting circuits.

For engineers reviewing the DMC4050SSDQ datasheet, DMC4050SSDQ pinout, DMC4050SSDQ application, or DMC4050SSDQ equivalent, this dual MOSFET supports precise gate-drive timing matching, low R_DS(ON) symmetry across polarities, and thermal derating validation for 3-phase BLDC motor drivers and CCFL inverters under automotive ambient conditions.

Technical Context

This device implements two discrete enhancement-mode MOSFETs-N-channel Q1 and P-channel Q2-in a single SO-8 thermally optimized leadframe. Each channel features independently characterized gate threshold voltages (±0.8–1.8 V), body diode forward voltage (±0.7–1.0 V), and matched R_DS(ON) values at both 10 V and 4.5 V gate drive, enabling symmetrical switching in bidirectional topologies.

Thermal design is supported by validated junction-to-ambient resistance of 58 °C/W (dual-die operation) and junction-to-lead resistance of 51 °C/W, with linear derating applied above +70°C ambient. Safe operating area curves confirm pulsed current capability up to ±24.9 A with 300 μs pulse width and D = 0.02 duty cycle.

Key Specifications

Pinout & Package

Package: SO-8 surface-mount plastic package with matte tin–annealed copper leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary MOSFET applications.

Compared with DMC3025LSDQ-13 and SI6926ADQ-T1-GE3, the DMC4050SSDQ uniquely balances voltage rating, matched on-resistance, and automotive qualification-making it the sole option among the three qualified to AEC-Q101 with symmetric 40 V/45 mΩ performance for safety-critical motor control.

Availability

DMC4050SSDQ is available at Aetrix Electronics and suitable for automotive motor control, display backlighting, seat heater regulation, and power window actuation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DMC4050SSDQ 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and consumer markets since 1959.

The DMC series targets automotive-grade power MOSFETs with AEC-Q101 qualification, emphasizing matched complementary pairs for space-constrained bidirectional switching in safety-compliant vehicle subsystems.

FAQ

What is the maximum continuous drain current for each channel at +70°C ambient?

At TA = +70°C, the N-channel supports 4.38 A and the P-channel supports −4.52 A under linear derating conditions (SO-8 on 25 mm × 25 mm FR4 with 1 oz copper). These values reflect thermal limits when one die is active; simultaneous dual-die operation reduces each to 4.2 A due to shared thermal resistance.

Does DMC4050SSDQ support 4.5 V logic-level gate drive for both channels?

Yes: the N-channel achieves 60 mΩ R_DS(ON) at V_GS = +4.5 V and ID = 3 A; the P-channel achieves 60 mΩ at V_GS = −4.5 V and ID = −3 A. Both meet datasheet specifications under these conditions, enabling direct interface with 5 V microcontrollers without level-shifting.

How is thermal performance affected when both MOSFETs operate simultaneously?

When both dies conduct power, thermal resistance drops to 58 °C/W (junction-to-ambient) and 14.3 W max power dissipation per channel. This reflects increased self-heating; derating curves show 20% reduction in safe operating area versus single-die operation at identical pulse widths and duty cycles.

Are the body diodes in DMC4050SSDQ suitable for synchronous rectification?

Yes: both channels feature low V_SD (0.7–1.0 V at ±1 A) and fast reverse recovery (t_rr not specified but inferred from low Q_GD/Q_GS ratios), making them appropriate for freewheeling in buck-derived topologies. However, external Schottky diodes are recommended for >200 kHz operation where body diode recovery may limit efficiency.