Diodes Incorporated DGD21904S14-13

Overview

DGD21904S14-13 from Diodes Incorporated is a high-voltage, high-speed dual-channel gate driver IC for half-bridge N-channel MOSFET/IGBT control, featuring 600V high-side floating operation in bootstrap configuration, 4.5A typical sink/source output current per channel, and TTL/CMOS-compatible 3.3V logic inputs. It operates across –40°C to +125°C and is housed in an SO-14 package, targeting high-efficiency DC-DC converters and motor control inverters.

For engineers reviewing the DGD21904S14-13 datasheet, DGD21904S14-13 pinout, DGD21904S14-13 application, or DGD21904S14-13 equivalent, key selection considerations include high-side dV/dt immunity (50 V/ns), matched propagation delays (<50 ns), undervoltage lockout thresholds (7.6–9.8 V), and SO-14 thermal resistance (145 °C/W) under JEDEC 2-layer FR-4 conditions.

Technical Context

The DGD21904S14-13 integrates independent high-side and low-side drivers with isolated floating supply (VB/VS) and fixed logic supply (VCC/VSS). Its high-side driver uses bootstrap architecture with internal level-shifting and Schmitt-triggered HIN input, enabling reliable 600V offset switching under fast transient conditions.

Both outputs feature matched turn-on/turn-off propagation delays (typ. 140 ns) and tight delay matching (<50 ns), minimizing shoot-through risk in half-bridge topologies. Undervoltage lockout (UVLO) is implemented separately for VB and VCC rails with 0.6 V hysteresis, ensuring safe startup and fault recovery.

Key Specifications

Pinout & Package

Package: SO-14 (Type TH), surface-mount, lead-free, RoHS-compliant molded plastic case with UL 94V-0 rating and 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 IRS21844SPbF and DGD21904M, the DGD21904S14-13 offers optimal 3.3 V logic compatibility and proven thermal performance in SO-14, but its obsolete status makes DGD21904M the preferred long-term choice for volume production and automotive-qualified programs.

Availability

DGD21904S14-13 is available at Aetrix Electronics and suitable for DC-DC converters, motor controls, and AC-DC power supplies requiring stable component supply despite its obsolete status-inventory is held for legacy system repair and end-of-life support.

Supply support for DGD21904S14-13 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 high-reliability power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.

The DGD21904 belongs to Diodes' high-voltage gate driver product line, engineered specifically for robust half-bridge control in high-efficiency power conversion systems operating up to 600 V with demanding thermal and timing requirements.

FAQ

Is DGD21904S14-13 still in active production?

No-DGD21904S14-13 is officially obsolete and discontinued by Diodes Incorporated as of October 2024. The recommended replacement is DGD21904M, which shares identical pinout, electrical specifications, and SO-14 packaging while offering enhanced ESD robustness (HBM 8 kV) and ongoing production support.

Can DGD21904S14-13 drive IGBTs reliably at 20 kHz?

Yes-its 4.5 A typical output current, 25 ns rise time, and 140 ns propagation delay support reliable IGBT gate driving up to 20 kHz in hard-switched half-bridge configurations. Thermal derating must be applied above 85°C ambient due to SO-14's 145 °C/W RθJA on standard PCBs.

What is the minimum bootstrap capacitor value for 600 V operation?

For 600 V high-side operation at 100 kHz with 50% duty cycle, a minimum 100 nF ceramic capacitor (X7R, 1 kV rating) is recommended. This ensures sufficient charge retention during low-side off-time while maintaining <1 V droop across VB–VS under 4.5 A peak current demand.

Are the NC pins (4, 8, 9, 10, 14) electrically isolated or internally tied?

All NC pins (4, 8, 9, 10, 14) have no internal connection-confirmed by Diodes' mechanical drawings and pin description table. They must remain unconnected on PCB layout; soldering or routing to ground/power violates SO-14 mechanical integrity and may induce parasitic coupling.