Isolated, Precision
Half-Bridge Driver, 0.1 A Output
ADuM1234
FEATURES
GENERAL DESCRIPTION
Isolated high-side and low-side outputs
High side or low side relative to input: 700 VPEAK
High-side/low-side differential: 700 VPEAK
0.1 A peak output current
The ADuM12341 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.
CMOS input threshold levels
High frequency operation: 5 MHz maximum
High common-mode transient immunity: >75 kV/μs
High temperature operation: 105°C
Wide body, RoHS compliant, 16-lead SOIC
UL1577 2500 V rms input-to-output withstand voltage
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.
APPLICATIONS
Isolated IGBT/MOSFET gate drives
Plasma displays
Industrial inverters
In comparison to gate drivers employing high voltage level
translation methodologies, the ADuM1234 offers the benefit
of true, galvanic isolation between the input and each output.
Each output can be operated up to ±±77 VPEAK relative to the
input, thereby supporting low-side switching to negative voltages.
The differential voltage between the high side and low side can be
Switching power supplies
as high as ±77 VPEAK
.
As a result, the ADuM1234 provides reliable control over the
switching characteristics of IGBT/MOSFET configurations over
a wide range of positive or negative switching voltages.
FUNCTIONAL BLOCK DIAGRAM
ADuM1234
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
V
V
V
IA
DDA
OA
ENCODE
DECODE
IB
V
GND
NC
DD1
A
GND
1
DISABLE
NC
NC
V
V
DDB
ENCODE
DECODE
NC
OB
V
GND
B
DD1
NC = NO CONNECT
Figure 1.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329. Other patents pending.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2007 Analog Devices, Inc. All rights reserved.
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