GENERAL DESCRIPTION

The ADuM3220/ADuM32211 are isolated, 4 A dual-channel gate drivers based on the Analog Devices, Inc., iCoupler? technology.

Combining high speed CMOS and monolithic transformer technol-

ogy, these isolation components provide outstanding performance

characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers. The ADuM3220/ADuM3221 provide digital isolation in two

independent isolation channels. They have a maximum

propagation delay of 60 ns and 5 ns channel-to-channel matching.

In comparison to gate drivers that employ high voltage level

translation method-ologies, the ADuM3220/ADuM3221 offer the benefit of true, galvanic isolation between the input and

each output, enabling voltage translation across the isolation barrier. The ADuM3220 has shoot-through protection logic, which prevents both outputs from being on at the same time, whereas the ADuM3221 allows both outputs to be on at the same time. Both parts offer a default output low characteristic as required for gate drive applications. The ADuM3220/ADuM3221 operate with an input supply voltage ranging from 3.0 V to 5.5 V, providing compatibility with lower

voltage systems. The outputs of the ADuM3220A/ADuM3221A

can be operated at supply voltages from 4.5 V to 18 V. The outputs of the ADuM3220B/ADuM3221B can be operated at supply voltages from 7.6 V to 18 V. The junction temperature of the ADuM3220/ADuM3221 is

specified from ?40°C to +125°C.

FEATURES 4 A peak output current

Precise timing characteristics 60 ns maximum isolator and driver propagation delay

5 ns maximum channel-to-channel matching

High junction temperature operation: 125°C 3.3 V to 5 V input logic

4.5 V to 18 V output drive UVLO at 2.5 V VDD1

ADuM3220A/ADuM3221A UVLO at 4.1 V VDD2

ADuM3220B/ADuM3221B UVLO at 7.0 V VDD2

Thermal shutdown protection at >150°C Output shoot-through logic protection on the ADuM3220

Default low output

High frequency operation: dc to 1 MHz

CMOS input logic levels High common-mode transient immunity: >25 kV/μs

Enhanced system-level ESD performance per IEC 61000-4-x Safety and regulatory approvals

UL recognition 2500 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A VDE certificate of conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 560 V peak Small footprint and low profile

Narrow body, RoHS-compliant, 8-lead SOIC

5 mm × 6 mm × 1.6 mm Qualified for automotive applications

APPLICATIONS

Isolated synchronous dc-to-dc converters

MOSFET/IGBT gate drivers