current limiting protection, and thermal shutdown.
F1
+Vin
Barrier
+Vout
Case ground
External
DC
Power
Source
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 0.02Ω
is also required.
Trim
On/Off
Control
Open = On
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-450W.B04
Page 1 of 16
PAH 28Vout, 450-Watt Series
Isolated, 450-Watt, Half-Brick DC-DC Converter
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
I
OUT
Power
V
OUT
(Amps,
(Volts)
Max.) (Watts)
28
16
450
Input
Efficiency
Regulation (Max.)
Line
±0.25%
R/N (mV pk-pk)
Typ.
100
Root Model
➀
PAH-28/16-D48
Max.
300
Load
±0.25%
V
IN
Nom.
(Volts)
48
Range
(Volts)
36-75
I
IN
, no
load
(mA)
80
I
IN
, full
load
(Amps)
9.98
Min.
93%
Typ.
93.5%
Dimensions
(Inches)
2.3x2.4x0.5
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, +25ºC. 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
/
16
-
D48 N Bx H Lx
-
C
Power Amplifier
Half-Brick
Nominal Output Voltage
Maximum Output Current
in Amps
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)
*
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
On/Off Control Logic
N
= Negative logic
P
= Positive logic
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-450W.B04
Page 2 of 16
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
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Conditions
➀
Full power operation
Operating or non-operating, tested:
100 mS max. duration
Input to output
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
0
Typical/Nominal
Maximum
80
100
2250
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
None
0
0
15
454.72
448
Current-limited, no damage,
Output Current
0
16
A
short-circuit 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.
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
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load Input Current
Shut-Down Mode Input Current
Reflected (back) ripple current
➁
36
Fast blow
Rising input voltage
Falling input voltage
None, install external fuse
33
31
48
34
32
None
Pi
9.98
13.53
5
60
80
5
40
93
91.0
93.5
92.0
2250
1500
1500
basic
10
1,000
Yes
1.4
380
Power On to Vout regulated
(100% resistive load)
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
same as above
420
25
25
2500
±500
460
50
50
3500
±1000
Hours x 10
6
KHz
mS
mS
μSec
mV
75
20
35
33
Vdc
A
Vdc
Vdc
Vdc
Vin = nominal
Vin = minimum
Iout = minimum, unit=ON
Measured at input with specified filter
Vin=48V, full load, +25˚C.
@ Vin=Max
Input to output, continuous
Input to Baseplate, continuous
Output to Baseplate, continuous
10.19
13.88
7
200
100
10
80
A
A
2
A -Sec.
mA
mA
mA
mA, pk-pk
%
%
Vdc
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
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
Mohm
pF
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
Remote On/Off Control
➂
“N” suffix:
Negative Logic, ON state
Negative Logic, OFF state
Control Current
“P” suffix:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
Remote Sense Compliance
ON = ground pin or external voltage
OFF = pin open or external voltage
open collector/drain
ON = pin open or external voltage
OFF = ground pin or external votlage
open collector/drain
Vsense=Vout–Vload, Sense connected at load
–0.1
2.5
1
3.5
0
1
0.8
15
2
15
1
2
10
V
V
mA
V
V
mA
% of Vout
www.murata-ps.com/support
MDC_PAH-28Vout-450W.B04
Page 3 of 16
PAH 28Vout, 450-Watt Series
Isolated, 450-Watt, Half-Brick DC-DC Converter
FUNCTIONAL SPECIFICATIONS, PAH-28/16-D48 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception
➃
Short Circuit
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Hiccup autorestart duty cycle
Regulation
➄
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
External output capacitance required
➅
See Derating
No trim
At 50% load
User-adjustable
Via magnetic feedback
0.0
27.58
-1.5
16.8(-40%)
34
0
98% of Vnom., after warmup
Hiccup technique, autorecovery within ±1% of
Vout
Output shorted to ground, no damage
Current limiting
10
Vin=min. to max. Vout=nom.
Iout=min. to max. Vin=48V.
5 Hz- 20 MHz BW
At all outputs
Cap. ESR=<0.02Ω, Full resistive load
with baseplate; see mechanical drawings.
±0.25
±0.25
300
4700
2.3 X 2.4 X 0.5
58.4x60.96x12.7
3.67
104
0.040/0.06
1.016/1.524
Copper alloy
100-299
10.31
Aluminum
-40
-40
-55
115
85
120
125
130
%
%
%
mV pk-pk
% of Vnom./°C
μF
Inches
mm
Ounces
Grams
Inches
mm
μ-inches
μ-inches
17
No minimum load
19
0.5
Continuous
448
28
454.72
28.42
1.5
32.2(+15%)
50
16
25
1.0
W
Vdc
% of Vnom.
Vdc
Vdc
A
A
A
36
100
±0.015
470
MECHANICAL (Through Hole Models)
Outline Dimensions
Weight
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Case or Baseplate Material
Pins 1–4, 6–8/5,9
Nickel subplate
Gold overplate
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
Relative humidity, non-condensing
Altitude
(must derate -1%/1000 feet)
RoHS rating
With derating, full power, measured at Tref
Vin = Zero (no power)
Measured in center
External filter required
To +85°C
10
-500
-152
RoHS-6
˚C
˚C
˚C
˚C
Class
90
10,000
3048
Class
%RH
feet
meters
125
B
B
Notes
➀
Unless otherwise noted, all specifications are at nominal input voltage, nominal output voltage
and full load. General conditions are +25˚ Celsius ambient temperature, near sea level altitude,
natural convection airflow. All models are tested and specified with external parallel 1 μF and 470
μF output capacitors. A 220μF external input capacitors is required. All capacitors are low-ESR
types wired close to the converter.
➁
Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering
is Cbus=220 μF/100V, Cin=470 μF/100V and Lbus=12 μH.
➂
The Remote On/Off Control is referred to -Vin.
➃
Over-current protection is non-latching with auto reovery (Hiccup)
➄
Regulation specifications describe the output voltage changes as the line voltage or load current
is varied from its nominal or midpoint value to either extreme.
➅
Required minimum output capacitance is 470 μF, low ESR.
www.murata-ps.com/support
MDC_PAH-28Vout-450W.B04
Page 4 of 16
PAH 28Vout, 450-Watt Series
Isolated, 450-Watt, Half-Brick DC-DC Converter
TYPICAL PERFORMANCE DATA, PAH-28/16-D48
Efficiency and Power Dissipation @ Ta = +25°C
95
93
90
88
Efficiency (%)
85
83
80
78
75
73
70
0
1
2
3
4
5
6
7
8
9
Iout (Amps)
10
11
12
13
14
15
16
Power Dissipation
V
IN
= 48V
V
IN
= 75V
V
IN
= 48V
V
IN
= 36V
35
32
29
Dissipation (Watts)
26
23
20
17
14
11
8
5
Output Power Derating in Conduction Cooling (Cold Baseplate) Applications
(Vin=48V, Ambient Temperature <70°C)
475
450
Output Power (Watts)
425
400
375
350
20
30
40
50
60
70
80
90
100
Cold Baseplate (Interior) Temperature
(°C)
Maximum Current Temperature Derating at sea level
(Vin=48V, transverse airflow, on 10˝ x 10˝ PCB with baseplate)
18
16
14
Output Current (Amps)
12
10
8
6
4
2
0
30
35
40
45
50
55
60
65
70
75
80
85
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
Output Current (Amps)
18
16
14
12
10
8
6
4
2
0
30
Maximum Current Temperature Derating at sea level
(Vin=48V, longitudinal airflow, on 10˝ x 10˝ PCB with baseplate)
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature
(°C)
Ambient Temperature
(°C)
Maximum Power Temperature Derating at sea level
(Vin=48V, transverse airflow, on 10˝ x 10˝ PCB with baseplate)
460
420
380
Output Power (Watts)
340
300
260
220
180
140
100
30
35
40
45
50
55
60
65
70
75
80
85
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
Output Power (Watts)
460
420
380
340
300
260
220
180
140
100
30
Maximum Power Temperature Derating at sea level
(Vin=48V, longitudinal airflow, on 10˝ x 10˝ PCB with baseplate)
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