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EHS20-018-NHBRC [MURATA]

DC-DC Regulated Power Supply Module;
EHS20-018-NHBRC
型号： EHS20-018-NHBRC
厂家： muRata    muRata
描述：

DC-DC Regulated Power Supply Module
文件： 总6页 (文件大小：430K)
中文：  中文翻译
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E Class Converters  
EHS20 – 1.8V Model  
OBSOLETE PRODUCT  
Model  
1.8V  
Units  
Parameter  
1.78 – 1.82  
0.1% / 0.2%  
1.75 – 1.85  
90-110  
Output Voltage Setpoint  
Vdc  
% Vo  
Line/Load Regulation  
Output total regulation  
Output adjust (note 4)  
Max  
Vdc  
%Vo,nom  
10%  
100  
Remote-sense Comp.  
V
Output Ripple & Noise (note 2)  
Max  
Typ  
mVp-p  
0 - 20  
87%  
Output Current  
A
Efficiency (48V, Full load, 25C)  
%
1,000-10,000  
External Capacitance  
μF  
165  
400  
Transient Response (typ) (3)  
mV  
ΔVo  
Ts  
25% step, 1A/μs  
μs  
2.1 – 2.6  
25  
Over-voltage trip point (latching)  
V
A
Over-current trip point (non-latching)  
Typ  
All specifications, waveforms, charts at Ta=25C, Vin=48V, unless otherwise specified  
For full details go to  
www.murata-ps.com/rohs  
www.murata-ps.com/support  
1
EHS20-6200971501_D01_28/04/08  
E Class Converters  
Murata Power Solutions  
EHS20 – 1.8V Model  
Parameter  
Conditions  
Min. Typ. Max.  
Units  
Input  
Input Voltage (Vin)  
Reflected Ripple Current  
Inrush Transient  
36  
48  
25  
75  
Vdc  
‘mA p-p  
A2s  
See note (1)  
0.2  
100mS 10% duty  
cycle  
Input Voltage Transient  
Undervoltage Lockout  
100  
V
Turn-on  
(non-latching)Turn-off  
(non-latching)Turn-off  
32  
31  
77  
35  
34  
81  
Vdc  
Vdc  
Vdc  
Over-voltage lockout  
Isolation  
Input-Output  
Resistance; input-output  
1500  
10  
Vdc  
Mohm  
Temperature  
Operating Ambient  
Storage  
-40  
-40  
90  
°C  
°C  
125  
Protection  
Over-Temperature  
(non-latching)Measured on PCB  
125  
°C  
Physical Information Dimensions  
MTBF(Bellcore)  
2.30”L x 0.82” W x 0.36”H (58.4 x 20.8 x 9.3 mm)  
1,000,000 Hrs EHS15/20 Series  
Demonstrated at 40C ambient with 90% confidence: 2,800,000 Hrs  
Calculated at 40C ambient, (Bellcore)  
Complies with IEC/EN/CSA/UL 60950, provides basic insulation, input to output.  
c-UL-us (US and Canada) recognized, TUV certified (Bauart).  
Safety  
www.murata-ps.com/support  
2
EHS20-6200971501_D01_28/04/08  
E Class Converters  
Murata Power Solutions  
EHS20 – 1.8V Model  
EHS20-018 Thermal Derating  
Airflow from Vo(-) to Vo(+), Tj= 120ºC  
EHS20-018 Thermal Derating  
Airflow from Vin to Vo, Tj = 120ºC  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
400 LFM  
300 LFM  
200 LFM  
100 LFM  
400 LFM  
300 LFM  
200 LFM  
100 LFM  
20  
30  
40  
50  
60  
70  
80  
90  
20  
30  
40  
50  
60  
70  
80  
90  
Ambient Temperature [ºC]  
Q3 17OCt03  
Q3 17Oct03  
Ambient Temperature [ºC]  
EHS20-018 Enable with Pre-Bias  
EHS20-018 Efficiency  
90  
88  
86  
84  
82  
80  
Output Voltage @ 0.5 V/div., 2 ms/div.  
Prebias voltage = 1.2 Vdc. Input Voltage 48 V  
Load current = 0, Load capacitance = 2,200 uF.  
48 V  
36 V  
15  
75 V  
5
10  
20  
Output Current (A)  
Q3 21Oct03  
EHS20-018 Trim-up and Trim-down Resistance  
1000  
Trim Up/Down Formula : 1.8V model  
Rup (1.8 V)  
Rdown  
5.10 Vnom (100  
1.225 %  
%) 510  
%
Rup  
10.2  
K
100  
Where  
(Vout Vnom) 100  
Vnom  
and, Vout = Target output voltage  
%
Where  
510  
%
(Vnom Vout) 100  
%
Rdown( %)  
10.2 K  
Vnom  
10  
0%  
2%  
4%  
Delta (%)  
6%  
8%  
10%  
www.murata-ps.com/support  
3
EHS20-6200971501_D01_28/04/08  
E Class Converters  
EHS20 – 1.8V Model  
Murata Power Solutions  
EHS20-018 Startup Sequence from Enable  
EHS20-018 Startup Sequence from Vin  
Top Trace: Vout @ 0.5 V/div.  
Bot. Trace: Vin @ 20V/div. (48Vdc)  
Horiz. @ 50 ms/div.  
Top Trace: Vout @ 0.5 V/div.  
Bot. Trace: Venable @ 2 V/div.  
Horiz. @ 5 ms/div. Vin= 36Vdc  
Load: 20 A,  
Turn-on delay: 110mS  
Load: 20 A., 10,000 uF,  
Turn-on delay: 4.8 ms  
EHS20-018 Transient Response, 50- 25% step 1A/μs  
EHS20-018 Transient Response, 50-75% step 1A/μs  
Δ Vo = 68.8 mV  
Δ Vo = 73.4 mV  
EHS20-018 Input Reflected Ripple, Io=20A  
EHS20-018 Output Ripple Voltage, Io=20A  
Input Current @ 5 mA/div., 20 us/div. (9.4 mApp)  
Input Voltage: 48 Vdc, Load Current: 20 A  
Note: see test circuit on following page.  
www.murata-ps.com/support  
4
EHS20-6200971501_D01_28/04/08  
E Class Converters  
Murata Power Solutions  
EHS20 – 1.8V Model  
Notes:  
1.  
Input Reflected Ripple is specified when measured with the filter shown below  
is  
ic  
L2  
Vin  
12uF  
DC-DC  
Converter  
220uF,  
ESR<0.1 Ohm s  
33uF,  
ESR<0.7 Ohm s  
100kHz  
@
100kHz  
@
RTN  
2.  
Output Ripple 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 with a 470uF tantalum capacitor at the output of the converter  
Trim resistor connection: Rtrim-up connected from Vo adj to Vo(+), Rtrim –down connected from  
Vo adj to Vo(-).  
EHS20-018 Enable Pin Connection Table  
ENABLE POWER SUPPLY  
0V < Venable < 0.8V  
(internal pull-up > 50Kohms @  
5V)  
2.5V < Venable < 15V  
(external pull-up > 1Kohms)  
DISABLE POWER SUPPLY  
2.5V < Venable < 15V  
(external pull-up > 1Kohms)  
NEGATIVE LOGIC VERSION  
POSITIVE LOGIC VERSION  
0V < Venable < 0.8V  
(internal pull-up > 50Kohms @  
5V)  
Note:  
Power Supply has internal pull-up resistor. Enable pin is in a valid “high” state if left open-circuit.  
Safety considerations  
The EHS series of converters are certified to IEC/EN/CSA/UL 60950. If this product is built into information technology  
equipment, the installation must comply with the above standard.  
An external input fuse (5A to 30A 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.  
www.murata-ps.com/support  
5
EHS20-6200971501_D01_28/04/08  
E Class Converters  
Murata Power Solutions  
EHS20 – 1.8V Model  
Part Number Designations  
This product is subject to the following operating requirements  
and the Life and Safety Critical Application Sales Policy:  
Refer to: http://www.murata-ps.com/requirements/  
Murata Power Solutions, Inc.  
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
ISO 9001 and 14001 REGISTERED  
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other  
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply  
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without  
notice.  
© 2012 Murata Power Solutions, Inc.  
www.murata-ps.com/support  
6
EHS20-6200971501_D01_28/04/08  

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