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ADUM7234

Analog Devices
Part Number ADUM7234
Manufacturer Analog Devices
Description ISOLATED PRECISION HALF-BRIDGE DRIVER
Published Feb 8, 2010
Detailed Description Data Sheet FEATURES Isolated high-side and low-side outputs Working voltage High side or low side relative to input: ±35...
Datasheet PDF File ADUM7234 PDF File

ADUM7234
ADUM7234

Overview
Data Sheet FEATURES 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 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 APPLICATIONS Isolated IGBT/MOSFET gate drives Plasma displays Industrial inverters Switching power supplies Isolated, Precision Half-Bridge Driver, 4 A Output ADuM7234 GENERAL DESCRIPTION The ADuM72341 is an isolated, half-bridge gate driver that uses 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 that use high voltage level translation methodologies, the ADuM7234 offers the benefit of true, galvanic isolation between the input and each output and between each input.
Each output can be operated at 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 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 VIA 2 ENCODE DECODE VIB 3 VDD1 4 GND1 5 DISABLE 6 VDD1 7 ENCODE DECODE NC 8 Figure 1.
16 VDDA 15...


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