E Class Converters EHS20 – 1.5V Model OBSOLETE PRODUCT Model Parameter 1.5V Output Voltage Setpoint Units 1.48 – 1.52 Vdc 0.1% / 0.2% % Vo Output total regulation 1.45 – 1.55 Vdc Output adjust (note 4) 90-110 %Vo,nom Remote-sense Comp. 10% V Line/Load Regulation Output Ripple & Noise (note 2) Max 100 Max Output Current Efficiency (48V, Full load, 25C) Typ External Capacitance Transient Response (typ) (note 3) 25% step, 1A/μs 0-20 A 86% % 1,000 – 10,000 μF ΔVo 150 mV Ts 400 μs 1.80 – 2.03 V 25 A Over-voltage trip point (latching) Over-current trip point (non-latching) mVp-p 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 Technical enquiries email: [email protected], tel: +508 339 3000 1 EHS20-6200981505_D01_28/04/08 E Class Converters Murata Power Solutions EHS20 – 1.5V Model Parameter Conditions Input Input Voltage (Vin) Reflected Ripple Current Inrush Transient Input Voltage Transient Undervoltage Lockout Isolation Temperature Protection Over-voltage lockout Input-Output Resistance; input-output Operating Ambient Storage Over-Temperature Min. Typ. Max. Units 36 48 25 75 0.2 Vdc ‘mA p-p A2s 100 V 35 34 81 Vdc Vdc Vdc Vdc Mohm °C °C See note (1) 100mS 10% duty cycle Turn-on (non-latching)Turn-off (non-latching)Turn-off (non-latching)Measured on PCB Physical Information Dimensions 32 31 77 1500 10 -40 -40 90 125 125 °C 2.30”L x 0.82” W x 0.36”H (58.4 x 20.8 x 9.3 mm) Calculated at 40C ambient, (Bellcore) 1,000,000 Hrs EHS15/20 Series Demonstrated at 40C ambient with 90% confidence: 2,800,000 Hrs Complies with IEC/EN/CSA/UL 60950, provides basic insulation, input to output. c-UL-us (US and Canada) recognized, TUV certified (Bauart). MTBF Safety Pin Assignments Pin # 1 2 3 Description Vin (+) Enable Vin(-) Pin # 4 5 6 Description Vout(-) Sense Vo adj Pin # 7 8 Description Sense + Vo (+) www.murata-ps.com/support 2 EHS20-6200981505_D01_28/04/08 E Class Converters Murata Power Solutions EHS20 – 1.5V Model EHS20-015 TEMPERATURE DERATING Airflow from Vin(-) to Vin(+), Tj=120C 25 20 20 Iout (amps dc) 25 15 10 100 LFM 200 LFM 300 LFM 400 LFM 15 10 5 100 LFM 200 LFM 300 LFM 400 LFM 5 20 30 40 50 60 70 80 Ambient temp (deg c) 90 20 30 14Nov03 40 50 60 70 EHS20-015 Enable with Pre-Bias Ambient temp (deg c) 80 90 14Nov03 EHS20-015 Efficiency 90.0 85.0 Efficiency [%] 80.0 36V 48V 75V 75.0 70.0 Output Voltage @ 0.5 V/div., 2 ms/div. Prebias voltage =0.9 Vdc. Input Voltage 48 V Load current = 0, Load capacitance = 2,200 uF. 65.0 4 6 8 10 12 14 16 18 20 Iout [Adc] EHS20-015 Trim-up and Trim-down Resistance Trim Up/Down Formula : 1.5V model 1000 Rup 5.10 Vnom ( 100 %) 1.225 % Where % ( Vout Vnom) 100 510 10.2 and, Vout = Target output voltage Vnom Rdown ( % ) 510 Where 10.2 K % Rup (1.5 V) Rdown K % % Resistance (Kohms) Iout (amps dc) EHS20-015 TEMPERATURE DERATING Airflow from Input to Output, Tj=120C 100 10 ( Vnom Vout ) 100 Vnom 1 0% 2% 4% 6% Delta (%) 8% 10% www.murata-ps.com/support 3 EHS20-6200981505_D01_28/04/08 Murata Power Solutions E Class Converters EHS20 – 1.5V Model EHS20-015 Startup Sequence from Enable EHS20-015 Startup Sequence from Vin Top Trace: Vout @ 0.5 V/div. Bot. Trace: Vin @ 20V/div. (48Vdc) Horiz. @ 50 ms/div. Load: 20 A, Turn-on delay: 110mS Top Trace: Vout @ 0.5 V/div. Bot. Trace: Venable @ 2 V/div. Horiz. @ 5 ms/div. Vin= 36Vdc Load: 20 A., 10,000 uF, Turn-on delay: 4.8 ms EHS20-015 Transient Response, 50-25% step, 1A/us EHS20-015 Transient Response, 50-75% step, 1A/μs CH1: Vout AC coupled CH2 : Step up Current (2A/div) CH1: Vout AC coupled CH2 : Step down Current (2A/div) EHS20-015 Input Reflected Ripple Current, Iout = 20 A EHS20-015 Output Ripple Voltage, Iout = 20A Input Current @ 5.0 mA/div., 20 us/div. (14 mApp) Input Voltage: 48 V, Load Current: 20A Note: refer to test circuit schematic www.murata-ps.com/support 4 EHS20-6200981505_D01_28/04/08 E Class Converters Murata Power Solutions EHS20 – 1.5V Model Notes: 1. Input Reflected Ripple is specified when measured with the filter shown below is ic L2 Vin 1 2u F 2 2 0 uF , E S R < 0.1 O h m s @ 1 00 k H z 33uF, E S R < 0 .7 O hm s @ 1 0 0 kH z DC-DC Converter 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. Transient response is specified with a 470uF tantalum capacitor at the output of the converter 4. Trim resistor connection: Rtrim-up connected from Vo adj to Vo(+), Rtrim –down connected from Vo adj to Vo(-). EHS20-015 Enable Pin Connection Table NEGATIVE LOGIC VERSION POSITIVE LOGIC VERSION Note: 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) 0V < Venable < 0.8V (internal pull-up > 50Kohms @ 5V) 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 EHS20-6200981505_D01_28/04/08 Murata Power Solutions E Class Converters EHS20 – 1.5V 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 EHS20-6200981505_D01_28/04/08