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Embedded Power for
Business-Critical Continuity
ATCR250-48D12-03J
Rev. 05.06.11_112
ATCR250 Series
1 of 3
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, cUL 60950-1
TUV EN60950-1
Electrical Specifications
Input
Input ra­nge:
-36 V to -72 VDC
Transient:
-100 VDC (< 1 ms)
External Input Capacitance: 82uF max
Inrush Current:
11 A typ
Inrush Duration:
< 2ms
Undervoltage Lockout:
Overvoltage Lockout:
Efficiency:
-36 < VIN
-77.5 VIN < 72 VDC
89% @ 250W
Output
Nominal Setpoint:
Total Regulation Band1:
Output Current:
Current Limit:
Short Circuit:
Ripple and Noise2:
Overvoltage:
Undervoltage:
External Output Capacitance:
12 V Intermediate Bus
12.2 V
11.4 - 12.6 V
0 - 20.83 A
118% lo, max (typ)
Shutdown/Autorecovery
50 mVp-p
Vo > 13.4 VDC
NA
1000 uF min
3.3 V Management Bus
3.32V
3.20 - 3.40 V
0 - 4.5 A
130% lo, max (typ)
40 mVp-p
Vo > 3.6 VDC (typ)
Vo < 3.0 VDC (typ)
100 uF min
Control/Monitoring
ON/OFF+ and ON/OFF-:
I2C Serial Bus Interface:
Remote activation of Module. See ATCR250 Application Note
For digital monitoring (Vout, Vin, Temp, lin) referenced to
secondary side
Isolation Characteristic
Input to Output Isolation Voltage: 2250 VDC
Input to Output Insulation:
Basic
Environmental Specifications
Operating ambient temperature range:
Storage temperature:
MTBF:
-25 °C to +85 °C ambient
-40 °C to +125 °C
> 1 MHrs @ 25 °C 100% Load (Target)
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Embedded Power for
Business-Critical Continuity
Part Number System with Options
Product
Family
ATCR
Rated O/P Power
250
ATCA Product
Series
250 Watts
Input Voltage
Ouput Voltage
48 -
D12-03
-36 to -72 VDC
Dual Output:
12.0V @ 20.83A - Intermediate Bus
3.3V @ 4.5A - Management Bus
RoHS Compliance
J
J = RoHS 6/6
Rev. 05.06.11_112
ATCR250 Series
2 of 3
Pin Assignments
Pin Number/Pin Name
Function
Note
1. -48VA
2. -48VB
3. Reserved
Power input from A’ bus
Power input from B’ bus
For future use
Connects to ATCAZone 1 connector pin 33 via external 12 A fuse
Connects to ATCAZone 1 connector pin 34 via external 12 A fuse
4. Hold Up Trim
Hold up voltage trim
Connects a resistor between this pin and pin 11 to trim hold up voltage
5. RTN A
6. RTN B
7. ENA
8. ENB
9. C_CL-
10. HU-
11. HU+OUT
12. HU+IN
13. ON/OFF-
14. ON/OFF+
15. B_OK#
Power return from A’ bus
Connects to ATCAZone 1 connector pin 28 via external 15 A fuse
Power return from B’ bus
Connects to ATCAZone 1 connector pin 29 via external 15 A fuse
When connected to RTN A, turns ON isolated open Connects to ATCAZone 1 connector pin 32 via external 1 A fuse. Used to signal to
collector A enabled’ device (See Note 3)
management system correct board insertion and presence of A’ bus
When connected to RTN B, turns ON isolated open Connects to ATCAZone 1 connector pin 27 via external 1 A fuse. Used to signal to
collector B enabled’ device (See Note 3)
management system correct board insertion and presence of B’ bus
Connection to module of auxiliary capacitor hold Utilizes greater capacitance in a given can size of lower voltage capacitors.
up array -ve
Clamped to -50V wrt HU+OUT when pin 4 is open.
Connection to module of hold up capacitor
array -ve
Connection from on board filter and
management circuits to hold up capacitor
May also connect to input of boost module to reduce hold up storage area
array +ve
Connection to main power converter from hold up
capacitor array +ve
May also connect to output of boost module to reduce hold up storage area
Current from pin to turn main output ON
Fully floating remote ON/OFF signal, may be used with management system or
ATCA ENABLE_A/B via R-D network
Current into pin to turn main output ON
Fully floating remote ON/OFF signal, may be used with management system or
ATCA ENABLE_A/B via R-D network
Open collector signal, monitors status of B feed Low when OK
16. A_OK#
17. A2
18. INTRPT
19. A1
20. SCL
21. A0
22. SDA
23., 24. 3V3 RTN
25., 26. 3V3 OUT
Open collector signal, monitors status of B feed
Interrupt Alarm
Clock
Data
Management power return and I2C
3V3, 14.85 W management power
Low when OK
I2C lines, address strapping
I2C Register out of limits, LM80 pin INT#’ direct connection
I2C lines, address strapping
I2C lines, clock line input
I2C lines, address strapping
I2C lines, serial data
Also return for A_OK#’ and ‘B_OK#’ signals
Externally connected to ATCA Zone 1 connector pin 26
27., 28. 3V3 TRIM
Trim pin for management power
29. 12V RTN
12V return
Externally connected to ATCA Zone 1 connector pin 26
30. 12V OUT
12V power
Notes:
1. Regulation band over line, load and temperature.
2. Measured at 20 MHz with external 10 mF Tantalum in parallel with 1 mF ceramic, 25V rated low ESR type capacitors across each output.
3. All specifications are typical at nominal line, TA = 25 °C unless otherwise indicated.
4. All specifications are subject to change without notice.
5. Technical Reference Notes and Application Notes should be consulted for complete product details
6. Warranty 2 years.
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Mechanical Drawing
ATCR250-48D12-03J
Embedded Power for
Business-Critical Continuity
­Americas
5810 Van Allen Way
Carlsbad, CA 92008
USA
Telephone: +1 760 930 4600
Facsimile: +1 760 930 0698
Rev. 05.06.11_112
ATCR250 Series
3 of 3
Europe (UK)
Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX
United Kingdom
Telephone: +44 (0) 1384 842 211
Facsimile: +44 (0) 1384 843 355
Asia (HK)
14/F, Lu Plaza
2 Wing Yip Street
Kwun Tong, Kowloon
Hong Kong
Telephone: +852 2176 3333
Facsimile: +852 2176 3888
For global contact, visit:
www.Emerson.com/EmbeddedPower
techsupport.embeddedpower
@emerson.com
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