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PDF ATCR250 Data sheet ( Hoja de datos )
| Número de pieza | ATCR250 | |
| Descripción | Dual Input Bus Converter | |
| Fabricantes | Emerson | |
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Technical Reference Note
Embedded Power for
Business-Critical Continuity
ATCR250 Series
Dual Input Bus
Converter
Total Power: 250 Watts
Input Voltage: -48 VDC
Output: 12 V Intermediate Bus
3.3 V Management Bus
Special Features
• Optimized footprint for high density
ATCA applications
• Accepts inputs from -48 V and
B Feeds
• CISPR Class A EMI
• Adjustable Hold Up Voltage from 50
to 80 VDC
• I2C serial bus interface for monitoring
and reporting
• Programmable alarm
thresholds via I2C bus
• Hardware alarms via opto-
isolators for loss of A or B Feeds
• Comprehensive protection circuitry -
current, voltage and temperature
• EU directive 2002/95/EC
compliant for RoHS
Safety
• UL UL60950/UL2601**
• CSA CSA22.2 No. 234 Level 5
• VDE EN60950/EN60601-1**
• BABT Compliance to
EN60950/EN60601 BS7002
• CB Certificate and report
• CE Mark to LVD
Rev. 06.14.11
ATCR250 Series
1 of 16
Product Family:
Function:
Usage:
ATCR250
Dual Input Bus Converter
Definition:
The dual input ATCR250 bus converter provides AdvancedTCA (ATCA/
PICMG3.0) board designers a compact and rugged solution for generating
intermediate bus voltages in a footprint-optimized package.
The ATCR250 is more than a power converter. It also provides power
interface and power management functionality. The power interface
functions include ORing, filtering and inrush control, while power
management functionality is facilitated by both I2C serial bus and direct
high-speed interfaces.
Critical alarms, such as loss of A or B feeds, are hardware-implemented.
Other alarms are implemented over an I2C serial bus which is enhanced with
an interrupt pin.
The solution is provided in a 2.3 x 1.8 inch (59mm x 46mm) footprint and
provides an optimized solution for space-constrained systems that employ
distributed power architectures
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1 page  
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Embedded Power for
Business-Critical Continuity
Common Protection/Control
Characteristic
Overtemperature protection (IBC)
Overtemperature protection
(main unit)
Primary side threshold
Secondary side threshold
Primary side hysterisis
Secondary side hysterisis
Reliability and Service Life
Characteristic - Signal Name
Mean time between failure
Symbol
Top
Tpri
Tsec
Tpri_hys
Tsec_hys
Symbol
MTBF
Min Typ
120 125
116
116
Min Typ
TBD
Max
130
20
10
Max
Other Specifications
Characteristic - Signal Name
Switching frequency
Weight
Symbol
Fsw
Min Typ
400
120
Max
Rev. 06.14.11
ATCR250 Series
5 of 16
Units
°C
°C
°C
°C
°C
Notes and Conditions
The IBC shuts down, resulting in both shut down of
3.3 V and 12 V. Once the substrate temperature has
decreased by 5 °C, the IBC turns back on enabling
both voltages
Temperature sensors are on primary and secondary
side.
Once the thresholds have been exceeded, the 12
V output is disabled but the 3.3 V remains. The 12
V output can only be enabled by cycling power or
through the I2C interface provided that the tem-
perature has decreased below its hysterisis level.
Adjustable primary and secondary thresholds are
also provided and can be set lower than the fixed
thresholds. See Application Note.
Units
Hours
Notes and Conditions
Telcordia SR-332
Vin = Vin (nom); Iout = Iout (max); ambient 25 °C;
ground benign environment
Units
kHz
g
Notes and Conditions
As determined by IBC
Environmental Specifications
Characteristic - Signal Name
Thermal Performance
Symbol
Top
Min Typ
-25
Max
85
Units
°C
Notes and Conditions
See derating curves (Figures 1, 2, 3)
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5 Page 
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12 Vout
48 Vin
3.3 Vout
Figure 7: Turn-off Characteristic
Full Resistive Load (Input Power Removed)
Channel 1: 12 Vout; Channel 2: 3.3 Vout; Channel 3: 48 Vin
Inrush Current
Vinrush
Capacitor 82µF
Embedded Power for
Business-Critical Continuity
Rev. 06.14.11
ATCR250 Series
11 of 16
12 Vout
3.3 Vout
Figure 8: Typical Output Ripple and Noise Measurement
Channel 1: 12 Vout; Channel 2: 3.3 Vout
Vinrush
Capacitor 82µF
Inrush Current
Figure 9: Inrush Current (39.5 V)
Channel 2: Inrush Current;
Channel 1: Voltage Across Inrush Capacitor
I_12Vout
12 Vout
R/C Turn-on
signal
(Initial step is to change up capacitance)
Figure 11: Remote Control Turning-on Characteristic
Vin = 48 Volts, Turning-on into Full Load for 12 Vout & 3.3 Vout
Figure 10: Inrush Current (72 V)
Channel 2: Inrush Current;
Channel 1: Voltage Across Inrush Capacitor
R/C Turn-on
signal
12Vout
I 12 Vout
Figure 12: Remote Control Turning-off Characteristic
Vin = 48 Volts, Turning-off into Full Load for 12 Vout & 3.3 Vout
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11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ATCR250.PDF ] | |
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