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Bus Converter
EUS20-120 Model
Features: 48 Vin, Isolated, 4:1 Fixed Conversion Ratio 250 Watt Output at 48 Vin, 55 C, 200 LFM 200 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 Notes & Conditions Min 36 36 34 2 55 56 2 6.4 98 6 25 0.2 -0.1 2.4 2.4 -0.1 Table 2 Output Characteristics Output Voltage Set Point (Vo=Vin/4 +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 20 A Vin = 36 to 55 V, Io = 0 to 20 A, Vin = 42 to 53 V, Io = 0 to 23 A, 20 MHz Bandwidth 0 Percent deviation from ideal (9) Vin = 48 V, Io = 20 A Vin present: Enable to 90% Vout Enabled: Vin applied to 90% Vout 25% step, 0.1A/s, Vo Recovery Time < 10 95.5 10 80 160 100 2000 Min 11.94 8.3 9.7 90 Typ. 11.98 0.7 Max 12.0 13.75 13.25 150 20 Units Vdc V Vdc Vdc mV p-p A % % mS mS mV s F 0.8 5.0 5.0 0.8 57 58 Typ. 48 Max 55 60 37.5 35.5 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.
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 (10) On State range Off State range On State range Off State range
Technical enquiries email: sales@murata-ps.com tel: +508 339 3000 ,
1
EUS20-120-6200921520.B01 18/04/08
Murata Power Solutions
BUS CONVERTER
EUS20-120 Model
Table 1
Protection Characteristics Output Over-Current Shutdown Over Temperature Shutdown (5) Over Temperature Restart Hysteresis Notes & Conditions 0 Non-Latching Re-start rate Non-Latching Min 24 Typ. 25 75 125 10 Max 27 130 Units A msec C C
Table 2
General Specifications Isolation Voltage Isolation Resistance Storage Temperature Range Operating Temperature Range Thermal Measurement Location Temperature (7) Material Flammability MTBF Notes & Conditions 0 Input to Output Input to Output Non-condensing Ambient (7) See mechanical drawing for 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) 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
30
grams
Table 3
Standards Compliance UL/CSA 60950 EN60950 Notes & Conditions (6) Basic Insulation Certified by TUV
Notes:
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. Transient response is specified without a capacitor at the output of the converter. Product operates with an external capacitance significantly greater than specified. However, for values higher than 2000uF please contact C&D representative. Thermal shutdown is monitored at the Thermal Measurement Location (TML). See `Mechanical Information' on page 3 for TML location. See `Safety Considerations' shown on last page. 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. Recommended airflow direction is from pin 1 to pin 3, or 3 to 1 (transverse airflow). 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.
EUS20-120-6200921520.B01 18/04/08 2
Murata Power Solutions
Mechanical Information
BUS CONVERTER
EUS20-120 Model
Figure 1
Pin Assignment
Table 4
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
EUS20-120-6200921520.B01 18/04/08 3
Murata Power Solutions
BUS CONVERTER
EUS20-120 Model
Efficiency Curves
Efficiency (%) vs. Iout (A) and Vin (V)
97% 96% 95% 94% 93% 92% 91% 90% 2 4 6 8 10 12 14 16 18 20 22 24
55Vin 48Vin 42Vin 38Vin
Output Voltage vs. Current
Vo (V) vs. Io (A) and Vin (V)
14 13 12 11 10 9 55 Vin 8 7 6 0 2 4 6 8 10 12 14 16 18 20 22 24 48 Vin 42 Vin 38 Vin
EUS20-120-6200921520.B01 18/04/08 4
Murata Power Solutions
BUS CONVERTER
EUS20-120 Model
Airflow from pin 3 to pin 1
Iout (A) vs. Tamb (C) and Air Flow (LFM) at 42 Vin
Thermal Derating Curves (Transverse) TTML=120C
Iout (A) vs. Tamb (C) and Air Flow (LFM) at 38 Vin 24 22 20 18 16 14 12 10 8 6 4 2 0 25
100 LFM 200 LFM 300 LFM 400 LFM
24 22 20 18 16 14 12 10 8 6 4 2 0 45 55 65 75 85 25
100 LFM 200 LFM 300 LFM 400 LFM
35
35
45
55
65
75
85
Iout (A) vs. Tamb (C) and Air Flow (LFM) at 48 Vin 24 22 20 18 16 14 12 10 8 6 4 2 0 25 35 45 55 65 75 85
400 LFM 100 LFM 200 LFM 300 LFM
Iout (A) vs. Tamb (C) and Air Flow (LFM) at 55 Vin
24 22 20 18 16 14 12 10 8 6 4 2 0 25 35 45 55 65 75 85
100 LFM 200 LFM 300 LFM 400 LFM
Output Power Curves at 200 LFM as a function of Ambient Temperature and Vin
350 300 250 200 150 100 50 25 30 35 40 45 50 55 60 65 70 75 80 85
Vin = 38 VDC
Vin = 42 VDC
Vin = 48 VDC
Vin = 55 VDC
Ambient Temperature
EUS20-120-6200921520.B01 18/04/08 5
Murata Power Solutions
Turn-on from Vin (Enable On)
BUS CONVERTER
EUS20-120 Model
Turn-on from Enable (Vin present)
Figure 9
Ch1: Vin; Ch2: Vout
Vin=48V, Io=20A, Co=1000uF
Figure 10
C3: Enable; Ch2: Vout
Vin=48V, Io=20A, Co=1000uF
Output Ripple/Noise
Thermal Image
140.0C 140
120
SP01: 83.4 SP03: 78.0 SP02: 77.0 SP05: 91.2 SP04: 86.7
100
80
60
40 40.0C
Figure 11
Vin=48V, Io=20A
Vripple = 114 mVpp
Figure 12
Vi=48 V, Iout=20 A,
200 LFM bottom side
EUS20-120-6200921520.B01 18/04/08 6
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 TNV-2 requirements. The converters and materials meet UL 94V-0 flammability ratings.
Figure 13
Ordering Information
7
EUS20-120-6200921520.B01 18/04/08

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