DC/DC Converters. NPH15S4803iC Datasheet

NPH15S4803iC Converters. Datasheet pdf. Equivalent


Murata NPH15S4803iC
www.murata-ps.com
NPH15S Series
Isolated 15W Single Output DC/DC Converters
FEATURES
„ RoHS compliant
„ High efficiency to 89%
„ Power density up to 2.4W/cm3
„ UL 94V-0 package material
„ Industry standard pinout
„ UL 1950 recognized
„ Non latching current limit
„ Constant 350kHz frequency
„ 1.5kV input to output isolation
„ Versatile control options
„ Continuous rating to 30W at 40ºC without
heatsink
„ Operation to zero load
„ Protected against load faults
„ Internal over temperature protection
„ Uses no electrolytic capacitors
DESCRIPTION
The NPH15S series of DC/DC converters combines
ease of application with versatility. The pin pattern
is based on the popular industry standard, but two
additional pins may optionally be fitted to provide
a variety of features not commonly found on units
of this type. High efficiency enables full rating to
be achieved in a small package without heat-
sinking, and a high surge capability will provide
for start-up and transient loads, whilst being
thermally protected against sustained overload.
Overload protection of the “constant current” type
ensures start-up into complex load conditions. The
copper case achieves efficient heat transfer and
screening. The product range has been recog-
nised by Underwriters Laboratory (UL) to UL 1950
for operational insulation, file number E151252
applies.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
SELECTION GUIDE
Order Code1
Nominal Input
Voltage
V
NPH15S2403EiC
24
NPH15S2403iC
24
NPH15S2405EiC
24
NPH15S2405iC
24
NPH15S2412EiC
24
NPH15S2412iC
24
NPH15S2415EiC
24
NPH15S2415iC
24
NPH15S4803EiC
48
NPH15S4803iC
48
NPH15S4805EiC
48
NPH15S4805iC
48
NPH15S4812EiC
48
NPH15S4812iC
48
NPH15S4815EiC
48
NPH15S4815iC
48
Output
Voltage
V
3.4
3.4
5.1
5.1
12.1
12.1
15.1
15.1
3.4
3.4
5.1
5.1
12.1
12.1
15.1
15.1
Output
Current
A
4.4
4.4
3.0
3.0
1.3
1.3
1.0
1.0
4.4
4.4
3.0
3.0
1.3
1.3
1.0
1.0
Current Limit
Efficiency
A (Min.)
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
A (Max.)
11.0
11.0
7.5
7.5
3.7
3.7
3.0
3.0
11.0
11.0
7.5
7.5
3.7
3.7
3.0
3.0
%
81
81
84
84
86
86
87
87
83
83
85
85
88
88
89
89
MTTF2
kHrs
335
335
286
286
286
286
281
281
295
295
301
301
302
302
296
296
INPUT CHARACTERISTICS
Parameter
Conditions
Voltage range
Continuous operation, 24V input types
Continuous operation, 48V input types
Min. Typ. Max. Units
18 24 36
36 48 75
V
OUTPUT CHARACTERISTICS
Parameter
Conditions
Voltage set point error
50% load
Overall voltage error
Case temperature -40ºC to 110ºC
Load 0% - 100%
Input specified range
Temperature coefficient
of output voltage (slope)
Deviation of output
voltage
Temperature MIN-MAX
Line regulation
Load Regulation
Ripple
Operating voltage range, 50% load
0% - 100% rated load
rms
Min. Typ. Max. Units
0.5 %
2.5 %
250 ppmºC
0.5 1
%
0.1 %
0.5 %
70 mV
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
Flash tested for 1 second
Resistance
VISO = 500VDC
Min. Typ. Max. Units
1500 VDC
1 GΩ
ABSOLUTE MAXIMUM RATINGS
Input voltage, 24V input types
Input voltage, 48V input types
Output voltage
Output trim control
Synchronisation/shutdown control
-0.5V to 40V 3
-0.5V to 80V 3
-0.3V to regulated voltage
-1V to +30V
±15V relative to input return
1. Parts ending with EiC have optional TRIM and SS pins fitted.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
3. Absolute maximum value for 30 seconds. Prolonged operation may damage the product.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
KDC_NPH15S.F05 Page 1 of 8


NPH15S4803iC Datasheet
Recommendation NPH15S4803iC Datasheet
Part NPH15S4803iC
Description DC/DC Converters
Feature NPH15S4803iC; www.murata-ps.com NPH15S Series Isolated 15W Single Output DC/DC Converters FEATURES „ RoHS compli.
Manufacture Murata
Datasheet
Download NPH15S4803iC Datasheet




Murata NPH15S4803iC
NPH15S Series
Isolated 15W Single Output DC/DC Converters
CONTROL CHARACTERISTICS
Parameter
Conditions
Min. Typ. Max. Units
Voltage trimming range1
At rated load, trim control at either output
±10
%
Remote switch input (voltage relative to Not operating
input negative)1
Operating, open circuit voltage
-15 0 1.5
9 10 11
V
Start delay
Time from application of valid input voltage to output being in specifi-
cation
25 50 ms
Synchronisation1
Specified drive signal
320 440 kHz
Switching frequency
330 350 395 kHz
TEMPERATURE CHARACTERISTICS
Parameter
Case temperature
Storage
Relative humidity
Thermal protection
Conditions
Full load
Absolute Max. internal temperature
Non condensing 85ºC
Operates at case temperature
Min. Typ. Max. Units
-40 110
ºC
-40 125
85 %
110 ºC
THERMAL CHARACTERISTICS
UL 1950 recognition: Max. permissable loads for a given ambient temperature for any NPH15S model.
Temperature (ºC)
40
50
53
60
Power (W)
15.0
15.0
15.0
13.7
Temperature (ºC)
70
80
85
90
Max. power rating with case temperature maintained by external means (e.g. forced air cooling).
Part Number
NPH15S2403XXX
NPH15S2405XXX
NPH15S2412XXX
NPH15S2415XXX
NPH15S4803XXX
NPH15S4805XXX
NPH15S4812XXX
NPH15S4815XXX
100ºC
19
22
25
26
20
23
28
30
Case Temperature
105ºC
16
19
22
24
17
20
26
28
110ºC
12
15
19
21
13
16
23
25
Power (W)
11.7
9.8
8.8
7.8
Units
W
W
THERMAL PERFORMANCE
24V Input








 




      
"NCJFOU5FNQFSBUVSF ¡$
48V Input








 




      
"NCJFOU5FNQFSBUVSF ¡$
1. Optional - where fitted.
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KDC_NPH15S.F05 Page 2 of 8



Murata NPH15S4803iC
NPH15S Series
Isolated 15W Single Output DC/DC Converters
APPLICATION NOTES
OUTPUT VOLTAGE ADJUSTMENT
The trim resistor equations are:
Rup = (R/Vup) - S kΩ
Rdown = (L x T ) - T - S kΩ
Vdown
VNOM 3.4
S 22.2973
T 10.1351
R 17.9994
L -1.6241
5.1
20.59761
9.36255
24.49487
-2.48374
12.1
28.79096
15.42373
94.9661
-5.942857
15.1
39.95902
20.77869
147.7314
-7.990244
TRIM UP
+VIN
NPH15S
TRIM
+VOUT
RUP
-VOUT
TRIM DOWN
+VIN
NPH15S
TRIM
+VOUT
RDOWN
-VOUT
When the output voltage is trimmed up, output current must be derated so that the maximum output power is not exceeded.
Example to decrease output voltage of NPH15S4805EiC by 0.1V:
RDOWN = -2.48374 x 9.36255 - 9.36255 - 20.59761 = 203.18kΩ
( )-0.1
SET VOLTAGE
The output voltage of all units is set to 100mV above nominal, to offset resistive losses and thus assist with worst case error calculations. For the EiC versions, this
allowance can be altered with a single fixed resistor, connected from the trimming pin to one of the output pins.
SHUTDOWN
When the shutdown pin (SS) is shorted to the negative input, the converter will
stop. Its current consumption will then be less than 1mA at nominal supply
voltage. The voltage must be less than 1.5V to ensure that the unit stops, and
must be able to sink at least 1mA.
The unit will restart if the control pin is left open circuit or raised to a value
close to its normal open circuit voltage. This is typically 10V. Note however,
that the unit will not meet specification while a significant current drain from
this pin remains.
If the shutdown pin is to be connected to a long wire, it is recommended that a
capacitor decouples the pin to the supply common in order to avoid the risk of
injecting noise into the converter circuit. A series resistor may also be helpful.
Values of 10nF and 1kΩ may be used.
Many NPH series converters may be switched together simply by linking the
primary control pins. The primary common pins must also be linked.
FREQUENCY CONTROL
If the primary side dc control voltage is pulled away from its open circuit
voltage, the converter frequency will be changed, approximately in proportion
to the voltage. With +8.5VDC voltage to SS pin, the typical switching frequency
will be 300kHz. If this is raised to 15VDC, the switching frequency will typically
be 510kHz. The frequency may thus be moved away from a sensitive value or
into a safe area. Deviation of at least –10% to +30% is achievable, though the
efficiency will decline with significant changes. Also note that if the frequency
is lowered, the switching frequency component of output ripple will increase.
Since the design uses no large electrolytic capacitors, any use of a lower
frequency must allow for the effects of increased ripple. Additional external
filtering may be required.
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KDC_NPH15S.F05 Page 3 of 8







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