Datasheet

PAH-28 Vout, 350-Watt Series
Isolated, 350-Watt, Half-Brick DC-DC Converters
MDC_PAH-28Vout-350W.B05 Page 8 of 21
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FUNCTIONAL SPECIFICATIONS, PAH-28/12.5-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Minimum Typical/Nominal Maximum Units
Input Voltage, Continuous Full power operation 0 80 Vdc
Input Voltage, Transient
Operating or non-operating, tested:
100 mS max. duration
0 100 Vdc
Isolation Voltage Input to output 2250 Vdc
Input Reverse Polarity None, install external fuse None Vdc
On/Off Remote Control Power on or off, referred to -Vin 0 15 Vdc
Output Power 0 350 355.25 W
Output Current
Current-limited, no damage,
short-circuit protected
0 12.5 A
Storage Temperature Range Vin = Zero (no power) -55 125 ˚C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifi cations Table is not implied nor recommended.
INPUT
Operating voltage range 36 48 75 Vdc
Recommended External Fuse Fast blow 20 A
Turn On/Start-up threshold tested at 1/2 load Rising input voltage 33 34 35 Vdc
Turn Off/Undervoltage lockout tested at 1/2 load Falling input voltage 31 32 33 Vdc
Reverse Polarity Protection None, install external fuse None Vdc
Internal Filter Type Pi
Input current
Full Load Conditions Vin = nominal 7.84 8.04 A
Low Line Vin = minimum 10.57 10.84 A
Inrush Transient 2.5 5 A
2
-Sec.
Output in Short Circuit 60 100 mA
No Load Input Current Iout = minimum, unit=ON 80 100 mA
Shut-Down Mode Input Current 510mA
Refl ected (back) ripple current ➁
Measured at input with specifi ed fi lter 40 80 mA, pk-pk
GENERAL and SAFETY
Effi ciency
Vin=48V, full load, +25˚C. 92 93 %
@ Vin=Max 91.0 92.0 %
Isolation
Isolation Voltage
Input to output, continuous 2250 Vdc
Input to Baseplate, continuous 1500
Output to Baseplate, continuous 1500
Insulation Safety Rating basic
Isolation Resistance 10 Mohm
Isolation Capacitance 1,000 pF
Safety
Certifi ed to UL-60950-1, CSA-C22.2 No.60950-
1, IEC/EN60950-1, 2nd edition
Yes
Calculated MTBF
Per Telcordia SR332, issue 1 class 3, ground
fi xed, Tambient=+25˚C
1.2 Hours x 10
6
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency 380 420 460 KHz
Startup Time
Power On to Vout regulated
(100% resistive load)
25 50 mS
Startup Time Remote ON to 10% Vout (50% resistive load) 25 50 mS
Dynamic Load Response
50-75-50% load step, settling time to within
±1% of Vout di/dt = 1 A/µSec
2500 3500 µSec
Dynamic Load Peak Deviation same as above ±500 ±1000 mV
FEATURES and OPTIONS
Remote On/Off Control ➂
“N” suffi x:
Negative Logic, ON state ON = ground pin or external voltage –0.1 0.8 V
Negative Logic, OFF state OFF = pin open or external voltage 2.5 15 V
Control Current open collector/drain 1 2 mA
“P” suffi x:
Positive Logic, ON state ON = pin open or external voltage 3.5 15 V
Positive Logic, OFF state OFF = ground pin or external voltage 0 1 V
Control Current open collector/drain 1 2 mA
Remote Sense Compliance Vsense=Vout–Vload, Sense connected at load 10 % of Vout