ADUM3220 Datasheet, PDF (1/16 Pages) Analog Devices – 4 A Dual-Channel Gate Driver

FEATURES
4 A peak output current
Precise timing characteristics
60 ns maximum isolator and driver propagation delay
5 ns maximum channel-to-channel matching
High junction temperature operation: 125°C
3.3 V to 5 V input logic
4.5 V to 18 V output drive
UVLO at 2.5 V VDD1 and 4.1 V VDD2
Thermal shutdown protection at >150°C
Output shoot-through logic protection
Default low output
High frequency operation: dc to 1 MHz
CMOS input logic levels
High common-mode transient immunity: >25 kV/μs
Enhanced system-level ESD performance per IEC 61000-4-x
UL 1577 2500 V rms input-to-output withstand voltage
(pending)
Small footprint and low profile
Narrow body, RoHS-compliant, 8-lead SOIC
5 mm × 6 mm × 1.6 mm
APPLICATIONS
Isolated synchronous dc/dc converters
MOSFET/IGBT gate drivers
4 A Dual-Channel Gate Driver
ADuM3220
GENERAL DESCRIPTION
The ADuM3220¹ is a 4 A isolated, dual-channel gate driver
based on the Analog Devices, Inc., iCoupler® technology.
Combining high speed CMOS and monolithic transformer
technology, this isolation component provides outstanding
performance characteristics superior to the alternatives, such
as the combination of pulse transformers and gate drivers.
The ADuM3220 isolator provides two independent isolation
channels. It has a maximum propagation delay of 60 ns and 5 ns
channel-to-channel matching. In comparison to gate drivers
employing high voltage level translation methodologies, the
ADuM3220 offers the benefit of true, galvanic isolation
between the input and each output, enabling voltage translation
across the isolation barrier. The ADuM3220 has shoot-through
protection logic and a default output low characteristic as
required for gate drive applications. It operates with an input
supply voltage ranging from 3.0 V to 5.5 V, providing compat-
ibility with lower voltage systems. The outputs may be operated
at supply voltages from 5 V to 18 V, which supports typical gate
drive voltages for synchronous dc/dc converters.
The ADuM3220 isolator contains various circuit and layout
enhancements to provide increased capability relative to
system-level IEC 61000-4-x testing (ESD, burst, and surge).
The precise capability in these tests is strongly determined by
the design and layout of the user’s board or module. For more
information, see the AN-793 Application Note, ESD/Latch-Up
Considerations with iCoupler Isolation Products.
The ADuM3220 specifies the junction temperature from −40°C
to 125°C.
V_DD1 1
V_IA 2
V_IB 3
GND₁ 4
FUNCTIONAL BLOCK DIAGRAM
ADuM3220
ENCODE
DECODE
AND
LEVEL
SHIFT
8 V_DD2
7 V_OA
ENCODE
DECODE
AND
LEVEL
SHIFT
6 V_OB
5 GND₂
Figure 1.
1 _{Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.}
Rev. 0
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