High Voltage, Isolated Gate Driver with
Internal Miller Clamp, 2 A Output
Data Sheet
ADuM4121/ADuM4121-1
FEATURES GENERAL DESCRIPTION
1
2 A peak output current (<2 R ) The ADuM4121/ADuM4121-1 are 2 A isolated, single-channel
DSON
2.5 V to 6.5 V input
drivers that employ Analog Devices, Inc.s iCoupler technology
4.5 V to 35 V output
to provide precision isolation. The ADuM4121/ADuM4121-1
Undervoltage lockout (UVLO) at 2.5 V V
DD1 provide 5 kV rms isolation in the wide-body, 8-lead SOIC package.
Multiple UVLO options on V
DD2 Combining high speed CMOS and monolithic transformer
Grade A: 4.4 V (typical) UVLO on V
DD2 technology, these isolation components provide outstanding
Grade B: 7.3 V (typical) UVLO on V
DD2 performance characteristics superior to alternatives such as the
Grade C: 11.3 V (typical) UVLO on V
DD2 combination of pulse transformers and gate drivers.
Precise timing characteristics
The ADuM4121/ADuM4121-1 operate with an input supply
53 ns maximum isolator and driver propagation delay
ranging from 2.5 V to 6.5 V, providing compatibility with lower
CMOS input logic levels
voltage systems. In comparison to gate drivers that employ high
High common-mode transient immunity: >150 kV/s
voltage level translation methodologies, the ADuM4121/
High junction temperature operation: 125C
ADuM4121-1 offer the benefit of true, galvanic isolation
Default low output
between the input and the output.
Internal Miller clamp
The ADuM4121/ADuM4121-1 include an internal Miller clamp
Safety and regulatory approvals (pending)
that activates at 2 V on the falling edge of the gate drive output,
UL recognition per UL 1577
supplying the driven gate with a lower impedance path to reduce
5 kV rms for 1-minute withstand
the chance of Miller capacitance induced turn on.
CSA Component Acceptance Notice 5A
VDE certificate of conformity (pending)
Options exists to allow the thermal shutdown to be enabled or
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
disabled. As a result, the ADuM4121/ADuM4121-1 provide
V = 849 V peak
IORM
reliable control over the switching characteristics of insulated
Wide-body, 8-lead SOIC
gate bipolar transistor (IGBT)/metal oxide semiconductor field,
effect transistor (MOSFET) configurations over a wide range of
APPLICATIONS
switching voltages.
Switching power supplies
Isolated IGBT/MOSFET gate drives
Industrial inverters
Gallium nitride (GaN)/silicon carbide (SiC) power devices
FUNCTIONAL BLOCK DIAGRAM
UVLO TSD
ADuM4121/
1 8
V V
DD1 DD2
ADuM4121-1
DECODE
AND
2 ENCODE 7 V
V + OUT
I
LOGIC
V
I 3 6 CLAMP
2V
4 5
GND GND
1 UVLO 2
Figure 1.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.
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14967-001ADuM4121/ADuM4121-1 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1 ESD Caution...................................................................................6
Applications ....................................................................................... 1 Pin Configuration and Function Descriptions ..............................7
General Description ......................................................................... 1 Typical Performance Characteristics ..............................................8
Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 11
Revision History ............................................................................... 2 Applications Information .............................................................. 12
Specifications ..................................................................................... 3 Printed Circuit Board (PCB) Layout ....................................... 12
Electrical Characteristics ............................................................. 3 Propagation Delay-Related Parameters ................................... 12
Regulatory Information ............................................................... 4 Undervoltage Lockout ............................................................... 12
Package Characteristics ............................................................... 4 Output Load Characteristics ..................................................... 13
Insulation and Safety-Related Specifications ............................ 5 Power Dissipation....................................................................... 13
DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Insulation Lifetime ..................................................................... 14
Characteristics .............................................................................. 5
Typical Applications ................................................................... 14
Recommended Operating Conditions ...................................... 5
Outline Dimensions ....................................................................... 16
Absolute Maximum Ratings ............................................................ 6
Ordering Guide .......................................................................... 16
REVISION HISTORY
10/2016Revision 0: Initial Version
Rev. 0| Page 2 of 16