UHP28_2_12A Datasheet, PDF (3/9 Pages) Murata Manufacturing Co., Ltd. – Isolated, 12 Amp Half Brick, 48VIN/28.2VOUT DC/DC Converters

Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage, full-load conditions, unless noted. ⁽¹⁾
Input
Input Voltage Range
See Ordering Guide
Start-Up Threshold
34 Volts
Undervoltage Shutdown
32 Volts
Voltage Transients (100msec, no damage) +100 Volts max.
Overvoltage Shutdown
None ⁽⁷⁾
Reflected (Back) Ripple Current ⁽²⁾
50mAp-p
Input Current:
Full Load Conditions
Inrush Transient
Output Short Circuit
No Load
Low Line (VIN = VMIN)
Standby Mode
(Off, UV, OT, OC shutdown)
See Ordering Guide
1A²sec
200mA
75mA
9.37 Amps
10mA max.
Internal Input Filter
Pi-type
Recommended External Fuse
18 Amps slow blow
Reverse Polarity Protection
See fuse information
Remote On/Off Control: ⁽⁵⁾
Positive Logic ("P" model suffix)
Negative Logic ("N" model suffix)
ON = open pin or +2.8V to +12V max.
OFF = ground pin to +0.8V max.
ON = ground pin to +0.8V max.
OFF = open pin or +2.8V to +12V max.
Current
1mA
Output
Total Output Power
Voltage Output Range
Voltage Output Accuracy
342 Watts max.
See Ordering Guide
±1 % of Vnominal
Overvoltage Protection ⁽¹⁴⁾
Method
Voltage Adjustment Range ⁽¹²⁾
Temperature Coefficient
Minimum Loading
Remote Sense Compensation
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
Efficiency
Maximum Capacitive Loading (Resistive)
Isolation Voltage:
Input to Output
Input to Baseplate
Baseplate to Output
Isolation Resistance
Isolation Capacitance
Isolation Safety Rating
Current Limit Inception (98% of VOUT)
+125% of VOUT nominal
Magnetic feedback
+25.4V min. to +31V max.
±0.02% of VOUT range per °C
No minimum load
+1% max.
See Ordering Guide ⁽⁸⁾
See Ordering Guide and note ⁽¹⁰⁾
See Ordering Guide
3300μF (Low ESR <0.027 max.)
2250Vdc min.
1500Vdc min.
750Vdc min.
100M7
2000 pF
Basic insulation
16 Amps at cold start
15 Amps after warmup
Short Circuit ⁽⁶⁾
Protection Method
Short Circuit Current
Short Circuit Duration
Current limiting with hiccup autorestart
TBD
Continuous, output shorted to ground
(no damage)
UHP-28.2/12-D48
Isolated, 12 Amp Half Brick, 48VIN/28.2VOUT DC/DC Converters
Dynamic Characteristics
Dynamic Load Response (50-75-50%step) 100μsec to ±1% of final value
Load Step Peak Deviation
±600mV
Start-Up Time
(VIN on to VOUT regulated or On/Off to VOUT)
Switching Frequency
360msec for VOUT = nominal
320kHz
Environmental
Calculated MTBF ⁽⁴⁾
>3,000,000 Hours
Baseplate Temperature Range
(See derating curve) ^{(3) (13)}
–40 to +110°C max.
Storage Temperature Range
–55 to +125°C
Thermal Protection/Shutdown ⁽¹³⁾
+115°C
Relative Humidity
To 85% / +85°C, non-condensing
Acoustic Output 20Hz to 20kHz
No audible output in normal
office environments ⁽¹⁵⁾
Physical
Outline Dimensions
See Mechanical Specifications
Baseplate Material
Aluminum
Pin Material
Copper alloy
Weight
3.9 ounces (110 grams)
Electromagnetic Interference
Conducted and radiated
FCC part 15, class B, EN55022
(external filter required)
Safety
IEC/EN 60950 UL1012
UL/cUL 60950-1 CSA-C22.2 No.234
Surge, Shock, Vibration
ETSI 300-019-2-4
Flammability
ULV94-0
Absolute Maximum Ratings
Input Voltage
Continuous
Transient (100 msec max.)
On/Off Control
Input Reverse Polarity Protection
Output Overvoltage
Output Current ⁽⁷⁾
Storage Temperature
Lead Temperature (soldering 10 sec. max.)
to +75V
to +100V
–0.3 V min to +12V max.
See Fuse section ⁽¹¹⁾
VOUT +25% max.
Current-limited. Devices can
withstand sustained short circuit
without damage.
–55 to +125°C
+280°C
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the Perfor-
mance/Functional Specifications Table is not implied, nor recommended.
Performance/Functional Specification Notes:
(1) The UHP-28.2/12-D48 is tested and specified with external 1 || 10 μF ceramic/tantalum
output capacitors and a 22μF external input capacitor. All capacitors are low ESR types. These
capacitors are necessary to accommodate our test equipment and may not be required to
achieve specified performance in your applications. All models are stable and regulate within
spec under no-load conditions.
General conditions for Specifications are +25°C, VIN = nominal, VOUT = nominal, full load.
(2) Input Ripple Current is tested and specified over a 5Hz to 20MHz bandwidth. Input filtering is
CIN = 33μF tantalum, CBUS = 220μF electrolytic, LBUS = 12μH.
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