Diodes Incorporated DGD21844S14-13

Overview

DGD21844S14-13 from Diodes Incorporated is a high-voltage, high-speed half-bridge gate driver IC designed to control two N-channel MOSFETs or IGBTs in bootstrap-configured power stages. It supports 600V high-side floating operation, delivers 1.4A source / 1.8A sink peak output current, and features programmable deadtime via external resistor (280–520 ns), operating across –40°C to +125°C in SO-14 package. It is used in DC-DC converters and motor control inverters requiring robust high-side switching.

For engineers reviewing the DGD21844S14-13 datasheet, DGD21844S14-13 pinout, DGD21844S14-13 application, or DGD21844S14-13 equivalent, key selection criteria include bootstrap-compatible 600V high-side capability, TTL/CMOS logic compatibility down to 3.3V, Schmitt-triggered inputs with internal pull-down, independent UVLO for high/low-side supplies, and negative transient-tolerant outputs.

Technical Context

The DGD21844S14-13 integrates dual independent gate drivers with isolated high-side floating architecture using bootstrap biasing, enabling VS-referenced operation up to 600V offset. Its logic inputs (IN, SD*) accept 3.3V–5V TTL/CMOS levels and drive HO/LO outputs with matched propagation delays (tDMON ≤ 90 ns, tDMOFF ≤ 40 ns) and fast edge rates (tR ≤ 60 ns, tF ≤ 35 ns).

Deadtime is externally programmed via resistor on DT pin (280–520 ns range), preventing shoot-through in half-bridge topologies. Undervoltage lockout (UVLO) independently monitors VCC (8.0–9.8V threshold) and VB/VS supply rails, while output stages tolerate negative transients at COM and VS terminals-critical for noisy power stage environments.

Key Specifications

Pinout & Package

Package: SO-14 (Type TH), surface-mount, lead-free, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS21844PbF and UCC27211DR, the DGD21844S14-13 offers integrated deadtime tuning and tighter propagation matching at lower cost, making it optimal for cost-sensitive industrial inverters and mid-power SMPS where design simplicity and BOM reduction are prioritized.

Availability

DGD21844S14-13 is available at Aetrix Electronics and suitable for DC-DC converters, motor control inverters, and AC-DC power supplies requiring stable component supply and long-term industrial lifecycle support.

Supply support for DGD21844S14-13 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, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The DGD21844 belongs to Diodes' high-voltage gate driver product line, engineered specifically for reliable half-bridge control in energy-efficient power conversion systems operating up to 600V bus voltages.

FAQ

What is the maximum allowable dVS/dt for the DGD21844S14-13?

The DGD21844S14-13 is rated for a maximum high-side floating supply transient rate of 50 V/ns, as specified in its Absolute Maximum Ratings table. This value defines the upper limit of slew rate the VS pin can tolerate without risking internal latch-up or false triggering. Designers must ensure PCB layout minimizes parasitic inductance in the VS return path and use appropriate snubbing or gate resistors to keep actual dVS/dt below this threshold in high-frequency switching applications.

Can the DGD21844S14-13 drive IGBTs directly without external components?

Yes-the DGD21844S14-13 is explicitly characterized to drive both N-channel MOSFETs and IGBTs in half-bridge configurations. Its 1.4A source / 1.8A sink output current, 600V high-side capability, and negative transient tolerance meet typical IGBT gate drive requirements for devices rated up to 600V/50A. No external boost or level-shift circuitry is needed, though gate resistors should be selected to control switching speed and minimize EMI per the target IGBT's datasheet recommendations.

Is the DGD21844S14-13 still in active production?

No-the official Diodes Incorporated datasheet (DS38337 Rev. 4-4, July 2021) states "OBSOLETE – PART DISCONTINUED" and recommends migrating to DGD21844M. However, Aetrix Electronics maintains legacy inventory and offers last-time-buy support, including full traceability, extended warranty, and technical documentation for ongoing production and repair programs requiring this specific SO-14 variant.

How does the programmable deadtime function work electrically?

The DT pin connects to an internal current source that charges an internal capacitor; the external resistor sets the charging time constant, which directly determines the minimum non-overlap interval between LO turn-off and HO turn-on (and vice versa). With RDT = 0 Ω, deadtime is 280–520 ns; with RDT = 200 kΩ, it extends to 4–5 µs. The relationship is monotonic and factory-characterized-no calibration is required, and the feature operates across the full temperature and supply range without external timing components.