ADUM7234 Isolated Precision Half-Bridge Driver, 4 A Output

The ADuM7234 is an isolated, half-bridge gate driver that employs the Analog Devices, Inc., iCoupler® technology to provide independent and isolated high-side and low-side outputs. Combining high speed CMOS and monolithic transformer technology, this isolation component provides outstanding performance characteristics superior to optocoupler-based solutions. By avoiding the use of LEDs and photodiodes, this iCoupler gate drive device is able to provide precision timing characteristics not possible with optocouplers. Furthermore, the reliability and performance stability problems associated with optocoupler LEDs are avoided.

In comparison to gate drivers employing high voltage level translation methodologies, the ADuM7234 offers the benefit of true, galvanic isolation between the input and each output. Each output may be operated up to ±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 may 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.

Applications

Isolated IGBT/MOSFET gate drives
Plasma displays
Industrial inverters
Switching power supplies

Features and Benefits

Isolated high-side and low-side outputs

Working voltage

High side or low side relative to input: ±350 V peak
High side/low side differential: 350 V peak

High side or low side relative to input: ±350 V peak

High side/low side differential: 350 V peak

4 A peak output current

High frequency operation: 1 MHz maximum

High common-mode transient immunity: >25 kV/µs

High temperature operation: 105°C

Narrow body, 16-lead SOIC

Safety and regulatory approvals

UL recognition 1000 V rms for 1 minute per UL 1577

UL recognition
1000 V rms for 1 minute per UL 1577

Interface & Isolation

Isolated Gate Drivers

Aerospace and Defense

Solutions

Reference Designs

CN0196 Design & Integration Files .ZIP

Data Sheets

Document	note
ADuM7234: Isolated, Precision Half-Bridge Driver, 4 A Output Data Sheet (Rev. B)	PDF 266 kB

Application Notes

Document	note
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)	PDF 406 kB
AN-913: Isolating I2C Interfaces (Rev. 0)	PDF 280 kB
AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)	PDF 282 kB
AN-740: iCoupler® Isolation in RS-232 Applications (Rev. 0)	PDF 716 kB
AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0)	PDF 234 kB
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)	PDF 246 kB
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)	PDF 181 kB