cdc eus25-096

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BUS CONVERTER
EUS25-096 Model
Features:
9
48 Vin, Isolated, 5:1 Fixed Conversion Ratio
9
240 Watt Output at 48 Vin, 55 C, 200 LFM
9
175 Watt Output at 38 Vin, 55 C, 200 LFM
9
Industry Standard 1/8 Brick Footprint
9
Remote Enable (Primary Side, Positive or Negative)
9
Over-temperature and Over Current Protection
9
Direct Parallel Operation for Higher Power
9
RoHS Compliant
Table 1
Input Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Input Voltage Operating Range
36
48
55
Vdc
Input Voltage Absolute Maximum
60
Vdc
Turn-on Threshold
34
36
Vdc
Input Undervoltage Lockout
Turn-off Threshold
32
35
Vdc
Hysteresis Voltage
2
Vdc
Turn-on Threshold
55
58
Vdc
Input Overvoltage Lockout
Turn-off Threshold
56
59
Vdc
Hysteresis Voltage
2
Vdc
Maximum Input Current
Steady-State (26 A out)
6.4
Adc
No-Load Input Current
Enabled state, no load (48 Vin)
50
mA
Disabled Input Current
Disabled state (48 Vin)
6
mA
Input Reflected Ripple Current
Note (9)
50
mA p-p
A
2
s
Inrush Current Transient
0.2
On State range
Off State range
Enable – Negative Logic Version
Internal 10 K pull-up to 5 V.
-0.1
2.4
0.8
5.0
Vdc
Vdc
On State range
Off State range
Enable – Positive Logic Version
Internal 100 K pull-down to GND.
2.4
-0.1
5.0
0.8
Vdc
Vdc
Table 2
Output Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Output Voltage Set Point (Vo=Vin/5 +0/-0.5%)
Vin = 48.0 V, Io = 0 A
9.40
9.60
9.80
Vdc
Output Load Regulation
Io = 0 to 25 A
0.5
V
Output Voltage Total Regulation
Vin = 38 to 55 V, Io = 0 to 25 A,
6.60
11.20
Vdc
Vin = 42 to 53 V, Io = 0 to 25 A,
7.80
10.7
Vdc
Output Ripple Voltage & Noise
20 MHz Bandwidth
90
150
mV p-p
Output Current Operating Range
0
25
A
Output Current Share Accuracy
Percent deviation from ideal (8)
< 10
%
Efficiency
Vin = 48 V, Io = 25 A
95
%
Turn-On Time
Vin present: Enable to 90% Vout
10
mS
Start-up Inhibit Time
Enabled: Vin applied to 90% Vout
120
mS
Transient Response
25% step, 0.1A/
μ
s,
Δ
Vo
160
mV
Recovery Time
100
μ
s
Maximum Output Capacitance
3000
μ
F
Technical enquiries email: sales@murata-ps.com, tel: +508 339 3000
1 EUS25-096 6200911514_B01 18/04/08
 BUS CONVERTER
EUS25-096 Model
Murata Power Solutions
Table 3
Protection Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Output Over-Current Shutdown
Non-Latching
27
30
33
A
Re-start rate
60
msec
Over Temperature Shutdown
Non-Latching
125
130
°C
Over Temperature Restart Hysteresis
10
°C
Table 4
General Specifications
Notes & Conditions
Min
Typ.
Max
Units
Isolation Voltage
Input to Output
2250
Vdc
Isolation Resistance
Input to Output
10
Mohm
Storage Temperature Range
Non-condensing
-40
125
°C
Operating Temperature Range
Ambient
-40
100
°C
Thermal Measurement Location Temperature
See mechanical drawing for TML location
120
°C
Material Flammability
UL 94V-0
x10
6
Hrs
MTBF
Calculated (Bellcore TR-332)
2.7
x10
6
Hrs
Demonstrated
> 2
2.28”L x 0.9”W x 0.48”H (max)
(57.9L x 22.9W x 12.19H mm max)
Dimension
Weight
30
grams
Table 5
Standards Compliance
Notes & Conditions (6)
UL/CSA 60950
Basic Insulation
EN60950
Certified by TUV
Notes:
(1)
Vin = 48Vdc, Ta = 25 °C, Airflow = 200 LFM for all data unless otherwise noted.
(2)
Output Ripple Voltage and noise is specified when measured with a 10uF tantalum and a 1uF ceramic capacitor at the converter
output pins.
(3)
Transient response is specified without a capacitor at the output of the converter.
(4)
Thermal shutdown is monitored at the Thermal Measurement Location (TML). See ‘Mechanical Information’ on page 3 for TML
location.
(5)
See ‘Safety Considerations’ shown in Figure 1.
(6)
De-rating curves are conducted in a controlled environment. End application testing is required to ensure the Thermal Measurement
Location temperature is below the maximum specified.
(7)
Recommended airflow direction is from pin 1 to pin 3, or 3 to 1 (transverse).
(8)
Current share accuracy is optimized when the source and load impedance presented to each converter is equal.
(9)
Input Reflected Ripple is specified when measured with a 12uH source inductance. Without an input filter inductor, input ripple is less
than 1 Arms for an input filter capacitance rated 70 mohms esr
2 EUS25-096 6200911514_B01_18/04/08
 BUS CONVERTER
EUS25-096 Model
Murata Power Solutions
Mechanical Information
Figure 1
Pin Assignment
Table 6
Pin #
Pin Name
Function
Notes & Conditions
1
Vi(+)
Positive Input Voltage
Referenced to Vi(-).
Positive Logic: Floating = Enabled
Negative Logic: Floating = Disabled
2
En
Input Enable / Disable
3
Vi(-)
Negative Input Voltage
4
Vo(-)
Negative Output Voltage
5
Vo(+)
Positive Output Voltage
3 EUS25-096 6200911514_B01_18/04/08
 BUS CONVERTER
EUS25-096 Model
Murata Power Solutions
Efficiency Curves
EUS25 Efficiency (%) vs Iout (A)
98
97
96
95
94
93
92
Vin=36V
Vin=48V
Vin=55V
91
90
89
88
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Iout [Adc]
Figure 2
Output Voltage vs. Current
EUS25-096 Output vs. Current
11.0
10.5
10.0
9.5
9.0
8.5
Vin=36V
Vin=48V
Vin=55V
8.0
7.5
7.0
6.5
6.0
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Iout [Adc]
Figure 3
4 EUS25-096 6200911514_B01_18/04/08
 BUS CONVERTER
EUS25-096 Model
Murata Power Solutions
Power Derating Curves, T
TML
=120C
EUS25-096_Pout(W) vs. Tam b(C) and Airflow
42Vin, 120C, Paralle l Airflow (IN to Out)
EUS25-096_Pout(W) vs . Tam b(C) and Airflow
38Vin, 120C, Parallel Airflow (IN to Out)
220
200
200
180
180
160
160
140
140
120
120
100
100
400 LFM
300 LFM
200 LFM
100 LFM
400 LFM
300 LFM
200 LFM
100 LFM
80
80
60
60
40
40
20
20
0
0
40
45
50
55
60
65
70
75
80
85
90
40
45
50
55
60
65
70
75
80
85
90
Figure 5
Figure 4
EUS25-096_Pout(W) vs. Tam b(C) and Airflow
55Vin, 120C, Paralle l Airflow (IN to Out)
EUS25-096_Pout(W) vs. Tam b(C) and Airflow
48Vin, 120C, Paralle l Airflow (IN to Out)
280
240
260
220
240
200
220
180
200
160
180
160
140
140
120
400 LFM
300 LFM
200 LFM
100 LFM
120
100
400 LFM
300 LFM
200 LFM
100 LFM
100
80
80
60
60
40
40
20
20
0
0
40
45
50
55
60
65
70
75
80
85
90
40
45
50
55
60
65
70
75
80
85
90
Figure 6
Figure 7
Output Power as a function of Ambient Temperature and Input Voltage
EUS25-096_Pout(W) vs . Tam b(C) and Vin (V).
200 LFM, 120C, Paralle l Airflow (IN to Out)
275
250
225
200
175
150
125
Vin = 55V
Vin = 48V
Vin = 42V
Vin = 38V
100
75
50
25
0
40
45
50
55
60
65
70
75
80
85
90
Figure 8
5 EUS25-096 6200911514_B01_18/04/08
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