current limiting protection, and thermal shutdown.
F1
+Vin
Barrier
+Vout
Case ground
External
DC
Power
Source
Open = On
Controller
and Power
NOTE: A minimum of 470µF
of capacitance is required
on the output to ensure
Cout stable operation. An ESR
equal to or less than 0.02
is also required.
Trim
On/Off
Control
Reference and
Error Amplifier
logic)
-Vin
-Vout
Figure 1. Simplified Schematic
Typical topology is shown. Some models may vary slightly.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_PAH-28Vout-350W.B06
Page 1 of 21
PAH-28 Vout, 350-Watt Series
Isolated, 350-Watt, Half-Brick DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
V
OUT
(Volts)
28
28
Input
Regulation (Max.)
Line
±0.125%
±0.25%
Root Model
➀
PAH-28/12.5-D24
PAH-28/12.5-D48
I
OUT
(Amps,
Max.)
12.5
12.5
Power
(Watts)
350
350
R/N (mV pk-pk)
Typ.
75
100
Max.
200
300
Load
±0.25%
±0.25%
V
IN
Nom.
(Volts)
24
48
Range
(Volts)
18-36
36-75
I
IN
, no
load
(mA)
80
80
I
IN
, full
load
(Amps)
15.7
7.84
Efficiency
Min.
91%
91.5%
Typ.
92.5%
93%
Dimensions
(inches)
2.3 x 2.4 x 0.5
2.3 x 2.4 x 0.5
➀
Please refer to the part number structure for additional ordering part numbers and options.
➁
All specifications are at nominal line voltage and full load, +25°C. unless otherwise noted. See
detailed specifications.
➂
Full power continuous output requires baseplate installation. Please refer to the derating curves.
PART NUMBER STRUCTURE
PAH
-
28
/
12.5
-
D48 N Bx H Lx
-
C
Power Amplifier
Half-Brick
Nominal Output Voltage
Maximum Output Current
in Amps
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
On/Off Control Logic
N
= Negative logic
P
= Positive logic
Pin length option
Blank
= standard pin length 0.180 in. (4.57 mm)
L1
= 0.110 in. (2.79 mm)
*
L2
= 0.145 in. (3.68 mm)
*
Conformal coating (optional)
Blank
= no coating, standard
H
= Coating added
*
Baseplate (installed on all models)
B
= Baseplate installed with standard M3-12.7 threaded rivet (typ. 4)
B1
= Baseplate installed with unthreaded insert
(see Mechanical section for details).
RoHS Hazardous Materials compliance
C =
RoHS-6 (no lead), standard, does not claim EU exemption 7b – lead in solder
*
Minimum order quantity is required.
Samples available with standard pin
length only.
Note:
Some model number combinations may
not be available. See website or contact
your local Murata sales representative.
www.murata-ps.com/support
MDC_PAH-28Vout-350W.B06
Page 2 of 21
PAH-28 Vout, 350-Watt Series
Isolated, 350-Watt, Half-Brick DC-DC Converters
FUNCTIONAL SPECIFICATIONS, PAH-28/12.5-D24
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
On/Off Remote Control
Output Power
Output Current
Conditions
100 mS max. duration
Input to output
Power on, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
50
2250
13.5
357
Units
Vdc
Vdc
Vdc
Vdc
W
0
0
Current-limited, no damage, short-circuit
0
12.5
A
protected
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 Specifications Table is not implied nor recommended.
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