Datasheet

PAH-28 Vout, 350-Watt Series
Isolated, 350-Watt, Half-Brick DC-DC Converters
MDC_PAH-28Vout-350W.B05 Page 3 of 21
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FUNCTIONAL SPECIFICATIONS, PAH-28/12.5-D24
ABSOLUTE MAXIMUM RATINGS Conditions Minimum Typical/Nominal Maximum Units
Input Voltage, Continuous 0 36 Vdc
Input Voltage, Transient 100 mS max. duration 50 Vdc
Isolation Voltage Input to output 2250 Vdc
On/Off Remote Control Power on, referred to -Vin 0 13.5 Vdc
Output Power 0 357 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 18 24 36 Vdc
Start-up threshold 14.5 16.5 Vdc
Undervoltage shutdown 11.5 14 Vdc
Internal Filter Type Pi Vdc
External Input fuse 35 A
Input current
Full Load Conditions Vin = nominal 15.77 16.26 A
Low Line input current Vin = minimum 22 A
Inrush Transient Vin = 24V. 1 A
2
-Sec.
Short Circuit input current 0.03 0.10 A
No Load input current Iout = minimum, unit=ON 80 100 mA
Shut-Down input currrent(Off, UV, OT) 515mA
Back Ripple Current 80 120 mA, pk-pk
GENERAL and SAFETY
Effi ciency Vin=24V, full load 91.5 92.5 %
Isolation
Isolation Voltage
Input to output 2250 Vdc
Input to Baseplate 1500 Vdc
Output to Baseplate 1500 Vdc
Insulation Safety Rating Basic
Isolation Resistance 10 M
Isolation Capacitance 1500 pF
Safety
Certifi ed to UL-60950-1, CSA-C22.2 No.60950-
1, IEC/EN60950-1, 2nd edition (pending)
Pending
Calculated MTBF
Per Telcordia SR-332, Issue 2, Method 1, Class
1, Ground Fixed, Tcase=+25°C
1200 Hours x 10
3
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency 300 KHz
Turn On Time
Startup Delay Vin On to 10% Vout or Remote On to 10% Vout 25 35 mS
Rise Time 10% Vout to 90% Vout 28 35 mS
Vout Rise Time
From 0%~100% 28 35 mS
Dynamic Load Response 50-75-50%, 1A/µs,within 1% of Vout 100 µSec
Dynamic Load Peak Deviation same as above ±200 ±400 mV
FEATURES and OPTIONS
Remote On/Off Control
“P” suffi x:
Positive Logic, ON state ON = pin open or external voltage 3.5 13.5 V
Positive Logic, OFF state OFF = ground pin or external voltage 0 1 V
Control Current open collector/drain 1 2 mA
“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 13.5 V
Control Current open collector/drain 1 2 mA
Remote Sense Compliance
Sense pins connected externally to respective
Vout pins
2 % of Vout