ADUM1234_15 Datasheet, PDF (1/12 Pages) Analog Devices – Isolated, Precision Half-Bridge Driver, 0.1 A Output

Data Sheet
FEATURES
Isolated high-side and low-side outputs
High side or low side relative to input: ±700 V peak
High-side/low-side differential: 700 V peak
0.1 A peak output current
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
Safety and regulatory approvals
UL recognition
2500 V rms for 1 minute per UL 1577
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
APPLICATIONS
Isolated IGBT/MOSFET gate drives
Plasma displays
Industrial inverters
Switching power supplies
Isolated, Precision Half-Bridge
Driver, 0.1 A Output
ADuM1234
GENERAL DESCRIPTION
The ADuM1234¹ 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 ADuM1234 offers the benefit of true galvanic
isolation between the input and each output. Each output can be
operated up to ±700 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 700 V peak.
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
V_IA 1
ADuM1234
16 V_DDA
V_IB 2
ENCODE
DECODE
15 V_OA
V_DD1 3
14 GND_A
GND₁ 4
13 NC
DISABLE 5
12 NC
NC 6
NC 7
ENCODE
DECODE
V_DD1 8
NC = NO CONNECT
Figure 1.
11 V_DDB
10 V_OB
9 GND_B
1 _{Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.}
Rev. A
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