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PDF ADuM3472 Data sheet ( Hoja de datos )
| Número de pieza | ADuM3472 | |
| Descripción | PWM Controller and Transformer Driver | |
| Fabricantes | Analog Devices | |
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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
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2010–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
ELECTRICAL CHARACTERISTICS—3.3 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
3.0 V ≤ VDD1 = VDDA ≤ 3.6 V; VDD2 = VREG = VISO = 3.3 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 = 3.3 V, VDD2 = VREG = VISO = 3.3 V.
Table 2.
Parameter
DC-TO-DC CONVERTER POWER SUPPLY
Isolated Output Voltage
Feedback Voltage Setpoint
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
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
I/O Input Currents
Symbol
VISO
VFB
VISO (LINE)
VISO (LOAD)
VISO (RIP)
VISO (N)
fSW
RON
Min
3.0
1.125
192
VUV+
VUV−
VUVH
IISO (MAX)
250
IDD1 (Q)
IDD1 (D)
IISO (LOAD)
IDD1 (MAX)
IIA, IIB, IIC, IID −10
Typ
3.3
1.25
1
1
50
100
1000
200
318
0.6
Max
3.6
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 = 3.0 V to 3.6 V
IISO = 20 mA to 100 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 = 3.3 V
70 % IISO = IISO (MAX)
IISO = 0 mA, f ≤ 1 MHz
9 20 mA
10 20 mA
11 20 mA
11 20 mA
12 20 mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
28 mA
29 mA
31 mA
32 mA
34 mA
CL = 15 pF, f = 12.5 MHz
244 mA
243 mA
241 mA
240 mA
238 mA
350 mA CL = 0 pF, f = 0 MHz, VDD1 = 3.3 V,
IISO = 250 mA
+0.01
+10
µA
Rev. B | Page 5 of 36
5 Page 
Data Sheet
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
PACKAGE CHARACTERISTICS
Table 5.
Parameter
RESISTANCE AND CAPACITANCE
Resistance (Input to Output)1
Capacitance (Input to Output)1
Input Capacitance2
IC Junction to Ambient Thermal
Resistance
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Symbol Min Typ Max Unit Test Conditions/Comments
RI-O 1012 Ω
CI-O 2.2 pF f = 1 MHz
CI 4.0 pF
θJA 50.5 °C/W Thermocouple is located at the center of
the package underside; test conducted on
a 4-layer board with thin traces3
TSSD
TSSD-HYS
150
20
°C TJ rising
°C
1 The device is considered a 2-terminal device: Pin 1 to Pin 10 are shorted together, and Pin 11 to Pin 20 are shorted together.
2 Input capacitance is from any input data pin to ground.
3 See the Thermal Analysis section for thermal model definitions.
REGULATORY APPROVALS
The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 are approved by the organizations listed in Table 6. Refer to Table 11
and the Insulation Lifetime section for more information about the recommended maximum working voltages for specific cross-insulation
waveforms and insulation levels.
Table 6.
UL
Recognized under the UL 1577 component
recognition program1
Single protection, 2500 V rms isolation
voltage
File E214100
CSA
Approved under CSA Component Acceptance
Notice #5A
Basic insulation per CSA 60950-1-03 and
IEC 60950-1, 600 V rms (848 V peak) maximum
working voltage
File 205078
VDE
Certified according to DIN V VDE V 0884-10
(VDE V 0884-10):2006-122
Reinforced insulation, 560 V peak
File 2471900-4880-0001
1 In accordance with UL 1577, each ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 is proof tested by applying an insulation test voltage of ≥3000 V rms
for 1 sec (current leakage detection limit = 10 µA).
2 In accordance with DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, each ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 is proof tested by applying
an insulation test voltage of ≥1050 V peak for 1 sec (partial discharge detection limit = 5 pC). The asterisk (*) marking branded on the component designates
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 7.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
2500
>5.1
Unit
V rms
mm
Minimum External Tracking (Creepage)
L(I02)
>5.1
mm
Minimum Internal Distance (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
0.017 min
>400
II
mm
V
Test Conditions/Comments
1-minute duration
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Distance through insulation
DIN IEC 112/VDE 0303, Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Rev. B | Page 11 of 36
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADuM3472.PDF ] | |
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