Transformer Driver. ADuM3472 Datasheet

ADuM3472 Driver. Datasheet pdf. Equivalent

ADuM3472 Datasheet
Recommendation ADuM3472 Datasheet
Part ADuM3472
Description PWM Controller and Transformer Driver
Feature ADuM3472; Data Sheet PWM Controller and Transformer Driver with Quad-Channel Isolators ADuM3470/ADuM3471/ADuM.
Manufacture Analog Devices
Datasheet
Download ADuM3472 Datasheet




Analog Devices ADuM3472
Data Sheet
PWM Controller and Transformer
Driver with Quad-Channel Isolators
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
FEATURES
Isolated PWM controller
Integrated transformer driver
Regulated adjustable output: 3.3 V to 24 V
2 W output power
70% efficiency at guaranteed load of 400 mA at 5.0 V output
Quad dc-to-25 Mbps (NRZ) signal isolation channels
20-lead SSOP package
High temperature operation: 105°C maximum
High common-mode transient immunity: >25 kV/µs
200 kHz to 1 MHz adjustable oscillator frequency
Soft start function at power-up
Pulse-by-pulse overcurrent protection
Thermal shutdown
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
Qualified for automotive applications
APPLICATIONS
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
Power supply start-up bias and gate drives
Isolated sensor interfaces
Process controls
Automotive
GENERAL DESCRIPTION
The ADuM3470/ADuM3471/ADuM3472/ADuM3473/
ADuM3474 devices1 are quad-channel digital isolators with an
integrated PWM controller and transformer driver for an isolated
dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler®
technology, the dc-to-dc converter provides up to 2 W of regulated,
isolated power at 3.3 V to 24 V from a 5.0 V input supply or from
a 3.3 V supply. This eliminates the need for a separate, isolated
dc-to-dc converter in 2 W isolated designs. The iCoupler chip scale
transformer technology is used to isolate the logic signals, and the
integrated transformer driver with isolated secondary side control
provides higher efficiency for the isolated dc-to-dc converter. The
result is a small form factor, total isolation solution. The ADuM347x
isolators provide four independent isolation channels in a variety of
channel configurations and data rates (see the Ordering Guide).
VDD1
VDDA
VIA/VOA
VIB/VOB
VIC/VOC
VID/VOD
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
FUNCTIONAL BLOCK DIAGRAMS
T1
RECT
X1 X2
VREG
ADuM3470/ADuM3471/
ADuM3472/ADuM3473/
DRIVER
ADuM3474
REG
PRIMARY
CONVERTER
FB
SECONDA RY
CONTROLLER
CH A
VDD2
5V
FB
OC
VISO
PRIMARY
DATA
I/O
4CH
CH B
CH C
CH D
SECONDA RY
DATA
I/O
4CH
GND1
GND2
Figure 1. Functional Block Diagram
VIA/VOA
VIB/VOB
VIC/VOC
VID/VOD
ADuM3470
ADuM3471
ADuM3472
ADuM3473
ADuM3474
Figure 2. Block Diagrams of I/O Channels
Rev. B
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Tel: 781.329.4700 ©2010–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com



Analog Devices ADuM3472
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—5 V Primary Input Supply/
5 V Secondary Isolated Supply ................................................... 3
Electrical Characteristics—3.3 V Primary Input Supply/
3.3 V Secondary Isolated Supply ................................................ 5
Electrical Characteristics—5 V Primary Input Supply/
3.3 V Secondary Isolated Supply ................................................ 7
Electrical Characteristics—5 V Primary Input Supply/
15 V Secondary Isolated Supply ................................................. 9
Package Characteristics ............................................................. 11
Regulatory Approvals................................................................. 11
Insulation and Safety-Related Specifications.......................... 11
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
Insulation Characteristics.......................................................... 12
Recommended Operating Conditions .................................... 12
Absolute Maximum Ratings.......................................................... 13
ESD Caution................................................................................ 13
Pin Configurations and Function Descriptions ......................... 14
REVISION HISTORY
5/14—Rev. A to Rev. B
Change to Table 4 ............................................................................. 9
7/13—Rev. 0 to Rev. A
Changed VDD1 Pin to NC Pin ....................................... Throughout
Changes to Features Section, Applications Section,
General Description Section, and Figure 1 ................................... 1
Created Hyperlink for Safety and Regulatory Approvals
Entry in Features Section................................................................. 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 5
Changes to Table 3............................................................................ 7
Changes to Table 4............................................................................ 9
Changes to Regulatory Approvals Section .................................. 11
Changes to Figure 3 and Table 9................................................... 12
Changes to Figure 4 and Table 12................................................. 14
Changes to Figure 5 and Table 13................................................. 15
Typical Performance Characteristics ........................................... 19
Terminology .................................................................................... 24
Applications Information .............................................................. 25
Application Schematics ............................................................. 25
Transformer Design ................................................................... 26
Transformer Turns Ratio........................................................... 26
Transformer ET Constant ......................................................... 27
Transformer Primary Inductance and Resistance ................. 27
Transformer Isolation Voltage .................................................. 27
Switching Frequency.................................................................. 27
Transient Response .................................................................... 27
Component Selection ................................................................ 27
Printed Circuit Board (PCB) Layout ....................................... 28
Thermal Analysis ....................................................................... 28
Propagation Delay-Related Parameters................................... 28
DC Correctness and Magnetic Field Immunity..................... 29
Power Consumption .................................................................. 30
Power Considerations................................................................ 30
Insulation Lifetime ..................................................................... 31
Outline Dimensions ....................................................................... 32
Ordering Guide .......................................................................... 33
Automotive Products ................................................................. 33
Changes to Figure 6 and Table 14................................................. 16
Changes to Figure 7 and Table 15................................................. 17
Changes to Figure 8, Table 16, and Table 17............................... 18
Change to Figure 9 ......................................................................... 19
Changes to Terminology Section ................................................. 24
Changes to Applications Information Section, Application
Schematics Section, Figure 38, Figure 39, and Figure 40 .......... 25
Changes to Transformer Turns Ratio Section ............................ 26
Changes to Transformer ET Constant Section,
Transient Response Section, and Table 19 .................................. 27
Changes to Figure 41...................................................................... 28
Changes to Power Consumption Section and Figure 45........... 30
Changes to Insulation Lifetime Section and Figure 48 ............. 31
Changes to Ordering Guide .......................................................... 33
Added Automotive Products Section .......................................... 33
10/10—Revision 0: Initial Version
Rev. B | Page 2 of 36



Analog Devices ADuM3472
Data Sheet
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/5 V SECONDARY ISOLATED SUPPLY
4.5 V ≤ VDD1 = VDDA ≤ 5.5 V; VDD2 = VREG = VISO = 5.0 V; fSW = 500 kHz; all voltages are relative to their respective grounds (see the
application schematic in Figure 38). All minimum/maximum specifications apply over the entire recommended operating range, unless
otherwise noted. All typical specifications are at TA = 25°C, VDD1 = VDDA = 5.0 V, VDD2 = VREG = VISO = 5.0 V.
Table 1.
Parameter
DC-TO-DC CONVERTER POWER SUPPLY
Isolated Output Voltage
Feedback Voltage Setpoint
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
Symbol
VISO
VFB
VISO (LINE)
VISO (LOAD)
VISO (RIP)
VISO (N)
fSW
Switch On Resistance
Undervoltage Lockout, VDD1, VDD2
Supplies
Positive Going Threshold
Negative Going Threshold
Hysteresis
DC to 2 Mbps Data Rate1
Maximum Output Supply Current2
Efficiency at Maximum Output
Supply Current3
iCOUPLER DATA CHANNELS
DC to 2 Mbps Data Rate1
IDD1 Supply Current, No VISO Load
ADuM3470
ADuM3471
ADuM3472
ADuM3473
ADuM3474
25 Mbps Data Rate (C Grade Only)
IDD1 Supply Current, No VISO Load
ADuM3470
ADuM3471
ADuM3472
ADuM3473
ADuM3474
Available VISO Supply Current4
ADuM3470
ADuM3471
ADuM3472
ADuM3473
ADuM3474
IDD1 Supply Current, Full VISO Load
RON
VUV+
VUV−
VUVH
IISO (MAX)
IDD1 (Q)
IDD1 (D)
IISO (LOAD)
IDD1 (MAX)
Min
4.5
1.125
192
400
Typ
5.0
1.25
1
1
50
100
1000
200
318
0.5
Max
5.5
1.375
10
2
515
Unit Test Conditions/Comments
V
V
mV/V
%
mV p-p
mV p-p
kHz
kHz
kHz
Ω
IISO = 0 mA, VISO = VFB × (R1 + R2)/R2
IISO = 0 mA
IISO = 50 mA, VDD1 = 4.5 V to 5.5 V
IISO = 50 mA to 200 mA
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
ROC = 50 kΩ
ROC = 270 kΩ
VOC = VDD2 (open loop)
2.8 V
2.6 V
0.2 V
f ≤ 1 MHz
mA VISO = 5.0 V
70 % IISO = IISO (MAX)
14 30
15 30
16 30
17 30
18 30
44
46
48
50
52
390
388
386
384
382
550
IISO = 0 mA, f ≤ 1 MHz
mA
mA
mA
mA
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
mA
mA
mA
mA
mA
CL = 15 pF, f = 12.5 MHz
mA
mA
mA
mA
mA
mA CL = 0 pF, f = 0 MHz, VDD1 = 5 V,
IISO = 400 mA
Rev. B | Page 3 of 36







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