Analog Devices Inc. ADUM4221-1BRIZ-RL

Overview

ADUM4221-1BRIZ-RL from Analog Devices is an isolated half-bridge gate driver with adjustable dead time, 4 A peak output current, 44 ns max propagation delay, and dual 4.5 V to 35 V output supply rails (VDDA/VDDB). It features CMOS input logic (2.5 V–6.5 V), 150 kV/μs CMTI, and thermal shutdown, designed for driving IGBTs/MOSFETs in high-voltage switching power supplies.

For engineers reviewing the ADUM4221-1BRIZ-RL datasheet, ADUM4221-1BRIZ-RL pinout, ADUM4221-1BRIZ-RL application, or ADUM4221-1BRIZ-RL equivalent, key selection criteria include dead-time adjustability via external resistor, single-PWM-input architecture, reinforced 5700 V_rms isolation, and operation up to 125°C junction temperature in wide-body SOIC_IC packaging.

Technical Context

The ADUM4221-1BRIZ-RL implements iCoupler® digital isolation with monolithic transformers to separate input logic (GND1-referenced) from independently powered high-side (GNDA/VDDA) and low-side (GNDB/VDDB) gate drive outputs. Its control logic includes built-in overlap protection and a dedicated DT pin that sets dead time by resistor-to-GND1 connection.

Unlike the dual-input ADUM4221 or no-dead-time ADUM4221-2, this variant accepts a single PWM input and generates complementary noninverting (VOA) and inverting (VOB) outputs with precise timing-t_DLH/t_DHL ≤ 33 ns, t_PSK ≤ 22 ns, and t_PWD ≤ 16 ns-enabling robust GaN/SiC half-bridge switching without external timing circuitry.

Key Specifications

Pinout & Package

ADUM4221-1BRIZ-RL uses a 16-lead wide-body SOIC_IC package (RI-16-2) with increased creepage (8.3 mm) for reinforced isolation. Pin 1 is PWM input; Pins 3 & 8 are tied VDD1; Pin 5 is DISABLE; Pin 6 is DT; Pins 10/15 are VOB/VOA; Pins 11/16 are VDDB/VDDA; Pins 4/9/14 are GND1/GNDB/GNDA; Pins 2/7/12/13 are NC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8271BD-IS and UCC5390SCD, ADUM4221-1BRIZ-RL uniquely combines 4 A drive, sub-44 ns timing, resistor-programmable dead time, and 5700 V_rms reinforced isolation in a single SOIC_IC package-reducing design risk in high-reliability, high-frequency power conversion.

Availability

ADUM4221-1BRIZ-RL is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, server PSUs, and EV onboard chargers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADUM4221-1BRIZ-RL 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

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and power management.

The ADuM4221 family was developed to address the demand for robust, high-speed isolated gate drivers in next-generation SiC/GaN-based power converters-emphasizing timing accuracy, thermal resilience, and regulatory-compliant reinforced isolation.

FAQ

What is the function of the DT pin on the ADUM4221-1BRIZ-RL?

The DT pin on the ADUM4221-1BRIZ-RL sets the dead time between VOA and VOB transitions using an external resistor connected to GND1. With R_DT = 10 kΩ to 500 kΩ, dead time ranges from 48 ns to 2831 ns. This prevents shoot-through in half-bridge configurations. The ADUM4221-1BRIZ-RL does not operate correctly if the DT pin is left floating or shorted to VDD1.

Does the ADUM4221-1BRIZ-RL support asymmetric output supply voltages?

Yes, the ADUM4221-1BRIZ-RL supports independent output supplies: VDDA powers the high-side output (VOA) and can range from 4.5 V to 35 V, while VDDB powers the low-side output (VOB) over the same range. This allows asymmetric configurations-for example, 15 V for VDDA and 12 V for VDDB-to optimize gate drive strength and power loss in SiC/GaN topologies.

What is the maximum operating junction temperature for the ADUM4221-1BRIZ-RL?

The ADUM4221-1BRIZ-RL has a maximum operating junction temperature of +125°C, with thermal shutdown (TSD) activating at +155°C and releasing at +125°C due to 30°C hysteresis. This ensures reliable operation in high-ambient environments such as enclosed power supplies and automotive under-hood applications where the ADUM4221-1BRIZ-RL is commonly deployed.

How does the DISABLE pin affect the outputs of the ADUM4221-1BRIZ-RL?

The DISABLE pin on the ADUM4221-1BRIZ-RL is active-high: when pulled high (≥2.0 V), it forces both VOA and VOB outputs low regardless of the PWM input state or dead time setting. This provides fail-safe gate control during fault conditions. When DISABLE is low or open (with internal pull-down), normal PWM-driven operation resumes. The ADUM4221-1BRIZ-RL maintains this behavior across its full temperature and supply range.

What safety certifications apply to the ADUM4221-1BRIZ-RL?

The ADUM4221-1BRIZ-RL carries pending UL 1577 (5700 V_rms, 1 min), CSA Component Acceptance Notice 5A, and VDE V 0884-11 (VIORM = 849 V_peak) certifications. It meets reinforced insulation requirements per IEC 62368-1 and IEC 60601-1 (2 MOPP), supporting use in medical and industrial equipment where galvanic isolation integrity is critical to system safety.