PAH 28Vout, 450-Watt Series
Isolated, 450-Watt, Half-Brick DC-DC Converter
FUNCTIONAL SPECIFICATIONS, PAH-28/16-D48
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Minimum
Typical/Nominal
Maximum
Units
Vdc
Conditions ➀
Full power operation
0
80
Operating or non-operating, tested:
100 mS max. duration
Input Voltage, Transient
0
100
Vdc
Isolation Voltage
Input to output
None, install external fuse
Power on or off, referred to -Vin
2250
Vdc
Vdc
Vdc
W
Input Reverse Polarity
On/Off Remote Control
Output Power
None
448
0
0
15
454.72
Current-limited, no damage,
short-circuit protected
Vin = Zero (no power)
Output Current
0
16
A
Storage Temperature Range
-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 Specifications Table is not implied nor recommended.
INPUT
Operating voltage range
Recommended External Fuse
Turn On/Start-up threshold tested at 1/2 load
Turn Off/Undervoltage lockout tested at 1/2 load
Reverse Polarity Protection
Internal Filter Type
36
48
75
20
35
33
Vdc
A
Vdc
Vdc
Vdc
Fast blow
Rising input voltage
Falling input voltage
None, install external fuse
33
31
34
32
None
Pi
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
Vin = nominal
Vin = minimum
9.98
13.53
5
60
80
10.19
13.88
7
200
100
10
A
A
A2-Sec.
mA
No Load Input Current
Iout = minimum, unit=ON
mA
mA
mA, pk-pk
Shut-Down Mode Input Current
Reflected (back) ripple current ➁
GENERAL and SAFETY
5
40
Measured at input with specified filter
80
Vin=48V, full load, +25˚C.
@ Vin=Max
93
91.0
93.5
92.0
%
%
Efficiency
Isolation
Input to output, continuous
Input to Baseplate, continuous
Output to Baseplate, continuous
2250
1500
1500
basic
10
Vdc
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Mohm
pF
1,000
Certified to UL-60950-1, CSA-C22.2 No.60950-1,
IEC/EN60950-1, 2nd edition
Per Telcordia SR332, issue 1 class 3, ground
fixed, Tambient=+25˚C
Safety
Yes
1.4
Calculated MTBF
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
380
420
25
460
50
KHz
mS
Power On to Vout regulated
(100% resistive load)
Startup Time
Startup Time
Remote ON to 10% Vout (50% resistive load)
50-75-50% load step, settling time to within
1% of Vout di/dt = 1 A/μSec
25
50
mS
Dynamic Load Response
2500
500
3500
1000
μSec
mV
Dynamic Load Peak Deviation
FEATURES and OPTIONS
Remote On/Off Control ➂
“N” suffix:
same as above
Negative Logic, ON state
Negative Logic, OFF state
Control Current
ON = ground pin or external voltage
OFF = pin open or external voltage
open collector/drain
–0.1
2.5
0.8
15
2
V
V
mA
1
1
“P” suffix:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
ON = pin open or external voltage
OFF = ground pin or external votlage
open collector/drain
3.5
0
15
1
2
V
V
mA
Remote Sense Compliance
Vsense=Vout–Vload, Sense connected at load
10
% of Vout
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MDC_PAH-28Vout-450W.B04 Page 3 of 16
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