Diodes Incorporated DGD2181MS8-13

Overview

DGD2181MS8-13 from Diodes Incorporated is a high-voltage, high-speed dual-channel gate driver IC for half-bridge N-channel MOSFET/IGBT control. It features independent high-side (600V bootstrap operation) and low-side drivers, 1.9A source / 2.3A sink peak output current, TTL/CMOS-compatible 3.3V logic inputs, and operates from –40°C to +125°C in SO-8 package. Used in DC-DC converters and motor controls where fast switching and robust shoot-through immunity are required.

For engineers reviewing the DGD2181MS8-13 datasheet, DGD2181MS8-13 pinout, DGD2181MS8-13 application, or DGD2181MS8-13 equivalent, key selection criteria include high-side floating voltage capability (VS up to 600V), propagation delay matching (<35 ns), undervoltage lockout thresholds (VCCUV± ≈ 7.4–9.8 V), and SO-8 thermal resistance (RθJA = 200 °C/W).

Technical Context

The DGD2181MS8-13 integrates two independent gate drivers with matched timing: tON (180–270 ns) and tOFF (220–330 ns) at VS = 0V or 600V, and delay matching ≤35 ns between HO and LO. Its high-side driver uses bootstrap architecture with VB referenced to VS, enabling operation with VS up to 600V and dVS/dt tolerance of 50 V/ns.

Logic inputs HIN and LIN feature Schmitt-triggered thresholds (VIH ≥2.5 V, VIL ≤0.8 V) and internal pull-downs; both drivers include independent undervoltage lockout (VBSUV± and VCCUV±) and tolerate negative transients on outputs. The device supports wide VCC (10–20 V) and logic supply compatibility down to 3.3V.

Key Specifications

Pinout & Package

Package: SO-8 (Type TH), surface-mount, lead-free, RoHS-compliant, moisture sensitivity level 3 per J-STD-020. Dimensions: 4.90 mm × 6.00 mm × 1.45 mm (D × E × A2), 0.075 g weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IRS2181STRPBF and UCC27211DR, the DGD2181MS8-13 uniquely balances 3.3V logic compatibility, 600V high-side capability, and SO-8 footprint - making it optimal for cost-sensitive, space-constrained industrial converters where bootstrap remains acceptable.

Availability

DGD2181MS8-13 is available at Aetrix Electronics and suitable for DC-DC converters, motor controls, and AC-DC power supplies requiring stable component supply across extended temperature ranges and high-voltage reliability.

Supply support for DGD2181MS8-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DGD2181MS8-13 belongs to Diodes' high-voltage gate driver product line, engineered specifically for efficient, robust half-bridge switching in industrial power conversion and motor drive systems.

FAQ

What is the maximum allowable dV/dt on the VS pin?

The DGD2181MS8-13 specifies a maximum dVS/dt of 50 V/ns under recommended operating conditions. This rating ensures reliable high-side driver operation during fast-switching events in hard-switched topologies. Exceeding this rate may cause false triggering or latch-up; layout practices such as minimized loop area and local decoupling are critical to maintain compliance.

Can HIN and LIN be driven with overlapping signals?

No - simultaneous high states on HIN and LIN will cause both HO and LO to activate, creating a shoot-through condition that can destroy external MOSFETs. The device does not include built-in dead-time insertion; external PWM controllers or gate-drive logic must enforce non-overlapping timing with minimum dead time ≥100 ns.

Is an external bootstrap diode required, and what specification is recommended?

Yes - a fast-recovery or Schottky diode is required between VB and VS to charge the bootstrap capacitor during LO conduction. Diodes Incorporated recommends a 100V/1A Schottky (e.g., RB050M-30) with trr <35 ns and VF <0.5 V at 100 mA to minimize voltage drop and ensure reliable high-side turn-on at high duty cycles.

Does the DGD2181MS8-13 support 5V-only logic interfaces?

Yes - while optimized for 3.3V compatibility, the HIN and LIN inputs function correctly with 5V TTL/CMOS logic. VIH minimum is 2.5 V across VCC = 10–20 V, and input leakage remains below 60 µA at VIN = 5 V, ensuring noise margin and compatibility with legacy 5V microcontrollers and gate driver ICs.