Datasheet ADUM7234 (Analog Devices)

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Isolated, Precision Half-Bridge Driver, 4 A Output Data Sheet ADuM7234 FEATURES GENERAL DESCRIPTION Isolated high-side and low-side outputs
The ADuM72341 is an isolated, half-bridge gate driver that
Working voltage
uses the Analog Devices, Inc., iCoupler® technology to provide
High side or low side relative to input: ±350 V peak
independent and isolated high-side and low-side outputs.
High side/low side differential: 350 V peak
Combining high speed CMOS and monolithic transformer
4 A peak output current
technology, this isolation component provides outstanding
High frequency operation: 1 MHz maximum
performance characteristics superior to optocoupler-based
High common-mode transient immunity: >25 kV/µs
solutions.
High temperature operation: 105°C
By avoiding the use of LEDs and photodiodes, this iCoupler gate
Narrow body, 16-lead SOIC
drive device is able to provide precision timing characteristics
Safety and regulatory approvals
not possible with optocouplers. Furthermore, the reliability and
UL recognition
performance stability problems associated with optocoupler
1000 V rms for 1 minute per UL 1577
LEDs are avoided.
APPLICATIONS
In comparison to gate drivers that use high voltage level
Isolated IGBT/MOSFET gate drives
translation methodologies, the ADuM7234 offers the benefit
Plasma displays
of true, galvanic isolation between the input and each output
Industrial inverters
and between each input. Each output can be operated at up to
Switching power supplies
±350 V peak relative to the input, thereby supporting low-side switching to negative voltages. The differential voltage between the high side and low side can be as high as 350 V peak. As a result, the ADuM7234 provides reliable control over the switching characteristics of IGBT/MOSFET configurations over a wide range of positive or negative switching voltages.
FUNCTIONAL BLOCK DIAGRAM NC 1 ADuM7234 16 VDDA VIA 2 ENCODE DECODE 15 VOA VIB 3 14 GNDA VDD1 4 13 NC GND1 5 12 NC DISABLE 6 11 VDDB VDD1 7 ENCODE DECODE 10 VOB
001
NC 8 9 GNDB
07990- Figure 1. 1 Protected by U.S. Patents 5,952,849 and 6,291,907.
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Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Electrical Characteristics Package Characteristics Insulation and Safety-Related Specifications Recommended Operating Conditions Regulatory Information Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Applications Information Common-Mode Transient Immunity Insulation Lifetime Outline Dimensions Ordering Guide