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BUS CONVERTER
EUS25-096 Model
Features:
48 Vin, Isolated, 5:1 Fixed Conversion Ratio 240 Watt Output at 48 Vin, 55 C, 200 LFM 175 Watt Output at 38 Vin, 55 C, 200 LFM Industry Standard 1/8 Brick Footprint Remote Enable (Primary Side, Positive or Negative) Over-temperature and Over Current Protection Direct Parallel Operation for Higher Power RoHS Compliant
Table 1
Input Characteristics Input Voltage Operating Range Input Voltage Absolute Maximum Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold Hysteresis Voltage Turn-on Threshold Turn-off Threshold Hysteresis Voltage Steady-State (26 A out) Enabled state, no load (48 Vin) Disabled state (48 Vin) Note (9) On State range Off State range On State range Off State range Notes & Conditions Min 36 34 32 2 55 56 2 6.4 50 6 50 0.2 -0.1 2.4 2.4 -0.1 0.8 5.0 5.0 0.8 58 59 Typ. 48 Max 55 60 36 35 Units Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Adc mA mA mA p-p 2 As Vdc Vdc Vdc Vdc
Input Overvoltage Lockout Maximum Input Current No-Load Input Current Disabled Input Current Input Reflected Ripple Current Inrush Current Transient Enable - Negative Logic Version Internal 10 K pull-up to 5 V. Enable - Positive Logic Version Internal 100 K pull-down to GND.
Table 2
Output Characteristics Output Voltage Set Point (Vo=Vin/5 +0/-0.5%) Output Load Regulation Output Voltage Total Regulation Output Ripple Voltage & Noise Output Current Operating Range Output Current Share Accuracy Efficiency Turn-On Time Start-up Inhibit Time Transient Response Maximum Output Capacitance Notes & Conditions Vin = 48.0 V, Io = 0 A Io = 0 to 25 A Vin = 38 to 55 V, Io = 0 to 25 A, Vin = 42 to 53 V, Io = 0 to 25 A, 20 MHz Bandwidth Percent deviation from ideal (8) Vin = 48 V, Io = 25 A Vin present: Enable to 90% Vout Enabled: Vin applied to 90% Vout 25% step, 0.1A/s, Vo Recovery Time Min 9.40 6.60 7.80 90 0 < 10 95 10 120 160 100 3000 Typ. 9.60 0.5 Max 9.80 11.20 10.7 150 25 Units Vdc V Vdc Vdc mV p-p A % % mS mS mV s F
Technical enquiries email: sales@murata-ps.com tel: +508 339 3000 ,
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EUS25-096 6200911514_B01 18/04/08
Murata Power Solutions
Table 3 Protection Characteristics Output Over-Current Shutdown Over Temperature Shutdown Over Temperature Restart Hysteresis Table 4 General Specifications Isolation Voltage Isolation Resistance Storage Temperature Range Operating Temperature Range Thermal Measurement Location Temperature Material Flammability MTBF Notes & Conditions Input to Output Input to Output Non-condensing Ambient See mechanical drawing for TML location UL 94V-0 Calculated (Bellcore TR-332) Demonstrated 2.28"L x 0.9"W x 0.48"H (max) (57.9L x 22.9W x 12.19H mm max) Notes & Conditions Non-Latching Re-start rate Non-Latching
BUS CONVERTER
EUS25-096 Model
Min 27 Typ. 30 60 125 10 Max 33 130 Units A msec C C
Min 2250 10 -40 -40
Typ.
Max
Units Vdc Mohm C C C x10 Hrs 6 x10 Hrs
6
125 100 120 2.7 >2
Dimension Weight Table 5 Standards Compliance UL/CSA 60950 EN60950
30
grams
Notes & Conditions (6) Basic Insulation Certified by TUV
Notes:
(1) (2) Vin = 48Vdc, Ta = 25 C, Airflow = 200 LFM for all data unless otherwise noted. Output Ripple Voltage and noise is specified when measured with a 10uF tantalum and a 1uF ceramic capacitor at the converter output pins. (3) (4) Transient response is specified without a capacitor at the output of the converter. Thermal shutdown is monitored at the Thermal Measurement Location (TML). See `Mechanical Information' on page 3 for TML location. (5) (6) See `Safety Considerations' shown in Figure 1. 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) (8) (9) Recommended airflow direction is from pin 1 to pin 3, or 3 to 1 (transverse). Current share accuracy is optimized when the source and load impedance presented to each converter is equal. 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
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Murata Power Solutions
Mechanical Information
BUS CONVERTER
EUS25-096 Model
Figure 1
Pin Assignment
Table 6 Pin # 1 2 3 4 5 Pin Name Vi(+) En Vi(-) Vo(-) Vo(+) Function Positive Input Voltage Input Enable / Disable Negative Input Voltage Negative Output Voltage Positive Output Voltage Referenced to Vi(-). Positive Logic: Floating = Enabled Negative Logic: Floating = Disabled Notes & Conditions
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EUS25-096 6200911514_B01_18/04/08
Murata Power Solutions
BUS CONVERTER
EUS25-096 Model
Efficiency Curves
EUS25 Efficiency (%) vs Iout (A)
98 97 96 95
Efficiency [%]
94 93 92 91 90
Vin=36V Vin=48V Vin=55V
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 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
Vout [V]
Vin=36V Vin=48V Vin=55V
Iout [Adc]
Figure 3
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EUS25-096 6200911514_B01_18/04/08
Murata Power Solutions
BUS CONVERTER
EUS25-096 Model
Power Derating Curves, TTML=120C
EUS25-096_Pout(W) vs. Tam b(C) and Airflow 38Vin, 120C, Parallel Airflow (IN to Out) 200 180 160 140 120 100 80 60 40 20 0 40 45
220 200 180 160 140 120 100 80 60 40 20 0 EUS25-096_Pout(W) vs. Tam b(C) and Airflow 42Vin, 120C, Parallel Airflow (IN to Out)
400 LFM 300 LFM 200 LFM 100 LFM 50 55 60 65 70 75 80 85 90
400 LFM 300 LFM 200 LFM 100 LFM 40 45 50 55 60 65 70 75 80 85 90
Figure 4
Figure 5
EUS25-096_Pout(W) vs. Tam b(C) and Airflow 48Vin, 120C, Parallel Airflow (IN to Out) 240 220 200 180 160 140 120 100 80 60 40 20 0 40 45
Figure 6
EUS25-096_Pout(W) vs. Tam b(C) and Airflow 55Vin, 120C, Parallel Airflow (IN to Out) 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0 85 90 40 45
Figure 7
400 LFM 300 LFM 200 LFM 100 LFM 50 55 60 65 70 75 80
400 LFM 300 LFM 200 LFM 100 LFM 50 55 60 65 70 75 80 85 90
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, Parallel Airflow (IN to Out) 275 250 225 200 175 150 125 100 75 50 25 0 40 45
Figure 8
Vin = 55V Vin = 48V Vin = 42V Vin = 38V 50 55 60 65 70 75 80 85 90
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EUS25-096 6200911514_B01_18/04/08
Murata Power Solutions
BUS CONVERTER
EUS25-096 Model
Turn-on from Vin (Enable On)
Turn-on from Enable (Vin present)
---TBD--
----TBD---
Figure 9
Ch1: Vin; Ch2: Vout Vin=48V, Io=22A, Co=3000uF
Figure 10
Ch2: Vout; Ch4: Enable Vin=48V, Io=22A, Co=3000uF
Output Ripple/Noise
Thermal Image
105.2C
---TBD--SP03: 85.0 SP01: 78.7
SP04: 79.3 SP02: 80.8
AIRFLOW
32.2C
Figure 11
Vout @ 50 mV/div. Vin=48V, Io=25A, Co = 0
Figure 12
Vi=42 V, Iout=25 A, @ 25 C, 200 LFM
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EUS25-096 6200911514_B01_18/04/08
Murata Power Solutions
BUS CONVERTER
EUS25-096 Model
Safety Considerations
The EUS series of converters are certified to the standards listed in the `Standards Compliance' section in the table above. If this product is built into information technology equipment, the installation must comply with the above standard. An external input fuse (10 A recommended), must be used to meet the above requirements. The output of the converter [Vo(+)/Vo(-)] is considered to remain within SELV limits when the input to the converter meets SELV or TNV2 requirements. The converters and materials meet UL 94V-0 flammability ratings. Figure 13
Ordering Information
RoHS Compliant The EUS series of converters is in compliance with the European Union Directive 2002/95/EC (RoHS) with repsect to the following sustances: lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE).
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EUS25-096 6200911514_B01_18/04/08

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