Texas Instruments UCC21222D

Overview

UCC21222D from Texas Instruments is an isolated dual-channel gate driver IC designed for high-reliability power stage control in automotive and industrial systems. It delivers 4A peak source and 6A peak sink output current, supports 3kVRMS galvanic isolation with >125V/ns CMTI, operates across –40°C to +150°C junction temperature, and enables half-bridge, dual high-side, or dual low-side configurations - used in on-board battery chargers and high-voltage DC-DC converters.

For engineers reviewing the UCC21222D datasheet, UCC21222D pinout, UCC21222D application, or UCC21222D equivalent, this page provides verified technical context, real-world switching parameters (33ns typical propagation delay, 5ns max pulse-width distortion), safety certifications (UL 1577, VDE 0884-17), and validated alternative part guidance for robust gate drive design.

Technical Context

The UCC21222D integrates two independent isolated output channels with programmable dead time via external resistor on the DT pin, supporting interlocked or overlapping operation. Its input side (VCCI) is galvanically isolated from both output sides (VDDA/VSSA and VDDB/VSSB), each with dedicated UVLO (8V rising threshold) and fast disable functionality.

It employs capacitive isolation technology achieving 4242VPK reinforced insulation per VDE 0884-17 and 3000VRMS per UL 1577, with barrier capacitance of ~1.2pF and insulation resistance >10¹²Ω at 25°C. The device features integrated deglitch filtering (rejects <5ns transients) and active pull-down on outputs during fault conditions.

Key Specifications

Pinout & Package

UCC21222D is housed in a 16-pin SOIC (D package) with wide creepage (>4mm) and clearance (>4mm) for reinforced isolation compliance. The package supports surface-mount assembly and thermal dissipation via PCB copper area (RθJA = 80.2°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated dual-channel gate driver applications.

Compared with Si823H9BD-IS and ADUM4223BRIZ, the UCC21222D uniquely combines programmable dead time, independent secondary grounds, and automotive-grade temperature range - enabling flexible, space-efficient, and safety-certified gate drive in next-generation power converters.

Availability

UCC21222D is available at Aetrix Electronics and suitable for on-board battery chargers, high-voltage DC-DC converters, and automotive HVAC inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for UCC21222D 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability electronics.

The UCC21222D belongs to TI's isolated gate driver product line, engineered specifically for high-efficiency, high-power-density motor drives, EV charging, and industrial power conversion where robust isolation, precise timing, and extended temperature operation are essential.

FAQ

What is the isolation voltage rating of the UCC21222D?

The UCC21222D is certified to 3000VRMS isolation for 1 minute per UL 1577 and 4242VPK repetitive peak voltage per DIN EN IEC 60747-17 (VDE 0884-17). Its reinforced insulation barrier also meets GB4943.1-2022 and supports up to 850VRMS working voltage - making it suitable for high-voltage automotive and industrial applications where safety-critical isolation is required. The UCC21222D achieves this with capacitive isolation and >4mm creepage/clearance in the SOIC-16 package.

Does the UCC21222D support half-bridge configuration?

Yes, the UCC21222D supports half-bridge configuration by assigning one channel as high-side (OUTA) and the other as low-side (OUTB), with independent VDDA/VSSA and VDDB/VSSB supplies enabling true floating high-side drive. Its programmable DT pin allows precise dead-time insertion to prevent shoot-through, and its >125V/ns CMTI ensures reliable level-shifting under high dV/dt. The UCC21222D datasheet explicitly confirms half-bridge, dual high-side, and dual low-side modes - all enabled without external components.

What are the UVLO thresholds for VDD on the UCC21222D?

The UCC21222D uses an 8V UVLO option with a rising threshold of 8.5V (min) and falling threshold of 7.9V (max), providing 0.6V hysteresis. This ensures stable gate drive only when secondary supplies are sufficiently established - preventing partial turn-on of power devices during brownout or startup. The UCC21222D also includes independent VCCI UVLO (2.7V rising) and fast disable functionality, collectively safeguarding power stage integrity across all supply domains.

How is dead time programmed on the UCC21222D?

Dead time on the UCC21222D is programmed by connecting an external resistor (RDT) between the DT pin and GND: 0–150Ω yields interlocked outputs with ~0.2ns to 6ns dead time; 1.7–100kΩ sets precise dead time (e.g., 10kΩ → ~99ns). Floating or tying DT to VCCI disables interlock, allowing output overlap. The UCC21222D implements this entirely on-chip - no external logic or timers needed - and guarantees matching across temperature (±10ns variation from –40°C to +150°C).

What is the maximum operating temperature of the UCC21222D?

The UCC21222D is rated for a junction temperature range of –40°C to +150°C, fully qualified across this span per AEC-Q100 stress testing for automotive use. Its thermal resistance (RθJA = 80.2°C/W) and safety-limiting power curves (Figure 5-2) allow sustained operation at 150°C junction under appropriate PCB layout and airflow - making the UCC21222D suitable for under-hood EV systems and high-power industrial converters where ambient temperatures exceed 105°C.