Diodes Incorporated DMHC3025LSD-13

Overview

DMHC3025LSD from Diodes Incorporated is a 30V complementary enhancement-mode MOSFET H-bridge in SO-8 package, integrating two N-channel (25 mΩ @ 10 V) and two P-channel (50 mΩ @ −10 V) devices for bidirectional DC motor control. It delivers 6.0 A continuous drain current (N-ch) and −4.2 A (P-ch) at 25°C with low gate drive requirements and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the DMHC3025LSD datasheet, DMHC3025LSD pinout, DMHC3025LSD application, or DMHC3025LSD equivalent, key selection criteria include on-resistance matching between complementary pairs, SO-8 thermal performance (R_θJA = 83°C/W), fast switching (t_F = 8.7 ns N-ch / 13.5 ns P-ch), and integrated body diode capability for regenerative braking in motor drives.

Technical Context

This H-bridge implements a fully integrated half-bridge topology per channel, enabling four-quadrant operation via independent gate control of N- and P-channel pairs. Its dual-complementary structure supports synchronous rectification and shoot-through prevention when driven with complementary PWM signals and dead-time insertion.

The device uses planar MOSFET technology optimized for low R_DS(ON) at 4.5 V gate drive (40 mΩ N-ch / 80 mΩ P-ch), enabling efficient operation from 5 V logic supplies. Thermal design is constrained by SO-8 package limitations (P_D = 1.5 W on FR-4 with 1-inch² copper), requiring careful PCB layout for heatsinking.

Key Specifications

Pinout & Package

Package: SO-8 surface-mount plastic package with matte tin–annealed copper leadframe, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge MOSFET applications.

Compared with DMHC3025LSDQ, the base DMHC3025LSD offers identical performance at lower cost for non-automotive designs, while Si7850DP trades qualification and package size for slightly higher conduction loss-making it viable only where thermal headroom exists and qualification is irrelevant.

Availability

DMHC3025LSD is available at Aetrix Electronics and suitable for DC motor control, DC-AC inverters, and industrial actuator drives requiring stable component supply, automotive-grade reliability without full PPAP overhead, and SO-8 thermal management compatibility.

Supply support for DMHC3025LSD 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 power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The DMHC3025LSD belongs to Diodes' Automotive-Grade Power MOSFET family, designed specifically for compact, high-efficiency H-bridge motor control in space- and thermal-constrained environments such as automotive HVAC, seat adjustment, and industrial robotics.

FAQ

What is the maximum safe operating frequency for DMHC3025LSD in PWM motor control?

DMHC3025LSD supports PWM frequencies up to 200 kHz based on its 8.7 ns N-channel fall time and 13.5 ns P-channel fall time, assuming adequate gate drive strength (≥2 A peak) and PCB layout minimizing parasitic inductance. At 100 kHz, total switching loss remains below 150 mW per channel with 50 % duty cycle and 24 V bus.

Can DMHC3025LSD drive a 24 V, 5 A DC motor directly without external gate drivers?

Yes-its N-channel gate threshold (1–2 V) and P-channel threshold (−1 to −2 V) allow direct drive from 3.3 V or 5 V MCUs, provided gate resistors limit peak current to <2 A and layout minimizes ringing. For robust 5 A continuous operation, a 1 Ω series gate resistor and local 100 nF bypass capacitor are recommended.

How does the body diode performance impact regenerative braking in motor applications?

The integrated body diodes have V_SD = 0.7–1.2 V (N-ch) and −0.7 to −1.2 V (P-ch) at 1.7 A, enabling efficient freewheeling and regenerative energy return during PWM off-times. Their 18.3 ns (N-ch) and 15.1 ns (P-ch) reverse recovery times minimize commutation loss and associated EMI in bidirectional motor control loops.

Is thermal derating required when operating DMHC3025LSD at 70°C ambient temperature?

Yes-its R_θJA = 83°C/W requires derating: at 70°C ambient, maximum allowable power dissipation drops to 0.96 W (from 1.5 W at 25°C), limiting continuous current to ~4.4 A (N-ch) or −3.1 A (P-ch) assuming worst-case R_DS(ON). Use of thermal vias and 2 oz copper improves margin by reducing effective R_θJA to ~50°C/W.