|
|
PDF ADuM4472 Data sheet ( Hoja de datos )
| Número de pieza | ADuM4472 | |
| Descripción | Isolated Switching Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADuM4472 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
Isolated Switching Regulator
with Quad-Channel Isolators
Data Sheet ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
FEATURES
Isolated PWM feedback with built in compensation
Primary side transformer driver for up to 2.5 W output power
with 5 V input voltage
Regulated adjustable output: 3.3 V to 24 V
Up to 80% efficiency
Quad dc-to-25 Mbps (NRZ) signal isolation channels
200 kHz to 1 MHz adjustable oscillator
Soft start function at power-up
Pulse-by-pulse overcurrent protection
Thermal shutdown
5000 V rms isolation
High common-mode transient immunity: >25 kV/μs
20-lead SOIC package with 8.3 mm creepage
High temperature operation: 105°C
APPLICATIONS
Power supply start-up bias and gate drives
Isolated sensor interfaces
Process controls
RS-232/RS-422/RS-485 transceivers
VDD1
VDDA
I/OA
I/OB
I/OC
I/OD
FUNCTIONAL BLOCK DIAGRAM
RECT
VISO
VREG
ADuM4470/
ADuM4471/
ADuM4472/
ADuM4473/
ADuM4474
PRIMARY
REG
CONTROLLER/
DRIVER
SECONDARY
CONTROLLER
INTERNAL
FEEDBACK
VDD2
5V
FB
OC
PRIMARY
DATA I/O
4-CHANNEL
GND1
CHA
CHB
CHC
SECONDARY
DATA I/O
4-CHANNEL
CHD
GND2
I/OA
I/OB
I/OC
I/OD
Figure 1.
GENERAL DESCRIPTION
The ADuM4470/ADuM4471/ADuM4472/ADuM4473/
ADuM44741 are quad-channel, digital isolators with a regu-
lated dc-to-dc isolated power supply controller and an internal
MOSFET driver. The dc-to-dc controller has an internal isolated
PWM feedback from the secondary side, based on the
iCoupler® chip scale transformer technology and complete loop
compensation. This eliminates the need to use an optocoupler
for feedback and compensates the loop for stability.
The ADuM447x isolators provide a more stable output voltage
and higher efficiency compared to unregulated isolated dc-
to-dc power supplies. The fully integrated feedback and loop
compensation in a wide-body SOIC package provide a smaller
form factor and 8.3 mm creepage distance solution.
The regulated feedback provides a relatively flat efficiency curve
over the full output power range. The ADuM447x enable a dc-
to-dc converter with a 3.3 V to 24 V isolated output voltage
range from either a 5.0 V or a 3.3 V input voltage, with an
output power of up to 2.5 W.
The ADuM447x isolators provide four independent isolation
channels in a variety of channel configurations and data rates.
(The x in ADuM447x throughout this data sheet stands for the
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474.)
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7075 329 B2. Other patents pending.
Rev. 0
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
©2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
Parameter
Logic High Output Voltages
Logic Low Output Voltages
AC SPECIFICATIONS
ADuM447xARIZ
Minimum Pulse Width
Maximum Data Rate
Propagation Delay
Pulse Width Distortion, |tPLH − tPHL|
Propagation Delay Skew
Channel-to-Channel Matching
ADuM447xCRIZ
Minimum Pulse Width
Maximum Data Rate
Propagation Delay
Pulse Width Distortion, |tPLH − tPHL|
Change vs. Temperature
Propagation Delay Skew
Channel-to-Channel Matching,
Codirectional Channels
Channel-to-Channel Matching,
Opposing Directional Channels
Output Rise/Fall Time (10% to 90%)
Common-Mode Transient Immunity
at Logic High Output
Common-Mode Transient Immunity
at Logic Low Output
Refresh Rate
Symbol
VOAH, VOBH,
VOCH, VODH
VOAL, VOBL,
VOCL, VODL
Min
VDDA − 0.3,
VISO − 0.3
VDDA − 0.5,
VISO − 0.5
PW
tPLH, tPHL
PWD
tPSK
tPSKCD/tPSKOD
PW
tPLH, tPHL
PWD
1
25
30
tPSK
tPSKCD
tPSKCD
tR/tF
|CMH|
|CML|
fr
25
25
Typ Max Unit
5.0 V
4.8 V
0.0 0.1 V
0.0 0.4 V
Test Conditions/Comments
IOx = −20 µA, VIx = VIxH
IOx = −4 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxH
IOx = 4 mA, VIx = VIxH
1000 ns
CL = 15 pF, CMOS signal levels
Mbps
CL = 15 pF, CMOS signal levels
55 100 ns
CL = 15 pF, CMOS signal levels
40 ns
CL = 15 pF, CMOS signal levels
50 ns
CL = 15 pF, CMOS signal levels
50 ns
CL = 15 pF, CMOS signal levels
40 ns
CL = 15 pF, CMOS signal levels
Mbps
CL = 15 pF, CMOS signal levels
45 60 ns
CL = 15 pF, CMOS signal levels
6 ns
CL = 15 pF, CMOS signal levels
5
ps/°C
CL = 15 pF, CMOS signal levels
15 ns
CL = 15 pF, CMOS signal levels
6 ns
CL = 15 pF, CMOS signal levels
15 ns
CL = 15 pF, CMOS signal levels
2.5 ns CL = 15 pF, CMOS signal levels
35
kV/µs
VIx = VDDA or VISO, VCM = 1000 V,
transient magnitude = 800 V
35
kV/µs
VIx = 0 V or VISO, VCM = 1000 V,
transient magnitude = 800 V
1.0 Mbps
1 VDD1 is the power supply for the push-pull transformer.
2 VDDA is the power supply of Side 1 of the ADuM447x.
3 The contributions of supply current values for all four channels are combined at identical data rates.
4 The VISO supply current is available for external use when all data rates are below 2 Mbps. At data rates above 2 Mbps, the data I/O channels draw additional current
proportional to the data rate. Additional supply current associated with an individual channel operating at a given data rate can be calculated as described in the
Power Consumption section. The dynamic I/O channel load must be treated as an external load and included in the VISO power budget.
5 The power demands of the quiescent operation of the data channels were not separated from the power supply section. Efficiency includes the quiescent power
consumed by the I/O channels as part of the internal power consumption.
6 This current is available for driving external loads at the VISO output. All channels are simultaneously driven at a maximum data rate of 25 Mbps with full capacitive load
representing the maximum dynamic load conditions. Refer to the Power Consumption section for calculation of available current at less than the maximum data rate.
Rev. 0 | Page 5 of 36
5 Page 
Data Sheet
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
Parameter
I/O Input Currents
Logic High Input Threshold
Logic Low Input Threshold
Logic High Output Voltages
Logic Low Output Voltages
AC SPECIFICATIONS
ADuM447xARIZ
Minimum Pulse Width
Maximum Data Rate
Propagation Delay
Pulse Width Distortion, |tPLH − tPHL|
Propagation Delay Skew
Channel-to-Channel Matching
ADuM447xCRIZ
Minimum Pulse Width
Maximum Data Rate
Propagation Delay
Pulse Width Distortion, |tPLH − tPHL|
Change vs. Temperature
Propagation Delay Skew
Channel-to-Channel Matching,
Codirectional Channels
Channel-to-Channel Matching,
Opposing Directional Channels
Output Rise/Fall Time (10% to 90%)
Common-Mode Transient Immunity
at Logic High Output
Common-Mode Transient Immunity
at Logic Low Output
Refresh Rate
Symbol
IIA, IIB, IIC, IID
VIH
VIL
VOAH, VOBH,
VOCH, VODH
VOAL, VOBL,
VOCL, VODL
Min
−20
2.0
VDDA − 0.3,
VISO − 0.3
VDDA − 0.5,
VISO − 0.5
PW
tPLH, tPHL
PWD
tPSK
tPSKCD/tPSKOD
PW
tPLH, tPHL
PWD
1
25
30
tPSK
tPSKCD
tPSKCD
tR/tF
|CMH|
|CML|
fr
25
25
Typ Max Unit
+0.01 +20 µA
V
0.8 V
5.0 V
4.8 V
0.0 0.1 V
0.0 0.4 V
Test Conditions/Comments
IOx = −20 µA, VIx = VIxH
IOx = −4 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxH
IOx = 4 mA, VIx = VIxH
1000 ns
CL = 15 pF, CMOS signal levels
Mbps
CL = 15 pF, CMOS signal levels
55 100 ns
CL = 15 pF, CMOS signal levels
40 ns
CL = 15 pF, CMOS signal levels
50 ns
CL = 15 pF, CMOS signal levels
50 ns
CL = 15 pF, CMOS signal levels
40 ns
CL = 15 pF, CMOS signal levels
Mbps
CL = 15 pF, CMOS signal levels
45 60 ns
CL = 15 pF, CMOS signal levels
6 ns
CL = 15 pF, CMOS signal levels
5
ps/°C
CL = 15 pF, CMOS signal levels
15 ns
CL = 15 pF, CMOS signal levels
6 ns
CL = 15 pF, CMOS signal levels
15 ns
CL = 15 pF, CMOS signal levels
2.5 ns CL = 15 pF, CMOS signal levels
35
kV/µs
VIx = VDDA or VISO, VCM = 1000 V,
transient magnitude = 800 V
35
kV/µs
VIx = 0 V or VISO, VCM = 1000 V,
transient magnitude = 800 V
1.0 Mbps
1 VDD1 is the power supply for the push-pull transformer.
2 VDDA is the power supply of Side 1 of the ADuM447x.
3 The contributions of supply current values for all four channels are combined at identical data rates.
4 The VISO supply current is available for external use when all data rates are below 2 Mbps. At data rates above 2 Mbps, the data I/O channels draw additional current
proportional to the data rate. Additional supply current associated with an individual channel operating at a given data rate can be calculated as described in the
Power Consumption section. The dynamic I/O channel load must be treated as an external load and included in the VISO power budget.
5 The power demands of the quiescent operation of the data channels were not separated from the power supply section. Efficiency includes the quiescent power
consumed by the I/O channels as part of the internal power consumption.
6 This current is available for driving external loads at the VISO output. All channels are simultaneously driven at a maximum data rate of 25 Mbps with full capacitive
load representing the maximum dynamic load conditions. Refer to the Power Consumption section for calculation of available current at less than the maximum
data rate.
Rev. 0 | Page 11 of 36
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADuM4472.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADuM4470 | Isolated Switching Regulator | Analog Devices |
| ADuM4471 | Isolated Switching Regulator | Analog Devices |
| ADuM4472 | Isolated Switching Regulator | Analog Devices |
| ADuM4473 | Isolated Switching Regulator | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |