ATCR25048D12-03J Datasheet, PDF (1/3 Pages) Artesyn Technologies – 250 Watt Half-Brick Isolated DCDC Converter

POWER
Data Sheet
ATCR250 Series
250 Watt Half-Brick Isolated DCDC Converter
Total Power: 250 Watts
Input Voltage: -48 VDC
Output: 12 V Intermediate Bus
3.3 V Management Bus
SPECIAL FEATURES
ƒƒ Optimized footprint for high density
ATCA applications
ƒƒ Accepts inputs from -48 V A and B
feeds
ƒƒ CISPR Class A EMI
ƒƒ Adjustable Hold Up Voltage from
50 - 80 VDC
ƒƒ I²C serial bus interface for
monitoring and reporting
ƒƒ Programmable alarm thresholds
via I²C bus
ƒƒ Hardware alarms via opto-isolators
for loss of A or B feeds
ƒƒ Comprehensive protection
circuitry: current, voltage and
temperature
ƒƒ EU directive 2002/95/EC compliant
for RoHS
SAFETY
ƒƒ UL/cUL 60950-1
ƒƒ TÜV EN60950-1
Electrical Specifications
Input
Input ra­nge
-36 V to -72 VDC
Transient
-100 VDC (< 1 ms)
External input capacitance
82 µF max
Inrush current
11 A typical
Inrush duration
< 2 ms
Undervoltage lockout
-36 < Vin
Overvoltage lockout
-77.5 < Vin < 72 VDC
Efficiency
89% @ 250 W
Output
12 V Intermediate Bus
3.3 V Management Bus
Nominal setpoint
Total regulation band¹
12.2 V
11.4 - 12.6 V
3.32 V
3.20 - 3.40 V
Output current
0 - 20.83 A
0 - 4.5 A
Current limit
118% Io, max (typ)
130% Io, max (typ)
Short circuit
Ripple and noise²
Shutdown/Autorecovery
50 mV pk-pk
40 mV pk-pk
Overvoltage
Vo > 13.4 VDC
Vo > 3.6 VDC (typ)
Undervoltage
NA
Vo < 3.0 VDC (typ)
External output capacitance
1000 µF min
100 µF 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, Iin) referenced to secondary side.
Isolation Characteristic
Input to Output isolation voltage 2250 Vdc
Input to Output insulation
Basic