E Class Converters EHS20 – 2.5V Model OBSOLETE PRODUCT Model Parameter 2.5V Output Voltage Setpoint Line/Load Regulation Max Output total regulation Output adjust (note 4) Remote-sense Comp. Output Ripple & Noise (note 2) Max Output Current Efficiency (48V, Full load, 25C) Typ External Capacitance Transient Response (typ) (note 3) 25% step, 1A/μs 2.47 – 2.52 Vdc 0.1% / 0.2% % Vo 2.43 – 2.57 Vdc 90-110 %Vo,no m 10% V 100 mVp-p 0-20 A 88% % 1,000-10,000 μF ΔVo 165 mV Ts 400 μs 3.0 – 3.5 V 25 A Over-voltage trip point (latching) Over-current trip point (non-latching) Units 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 EHS20-6200961507_D01_28/04/08 E Class Converters EHS20 – 2.5V Model Parameter Conditions Input Input Voltage (Vin) Reflected Ripple Current Inrush Transient Input Voltage Transient Undervoltage Lockout Over-voltage lockout Input-Output Resistance; input-output Operating Ambient Storage Isolation Temperature Protection 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 90 125 130 °C 2.30”L x 0.82” W x 0.37”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 EHS20-6200961507_D01_28/04/08 E Class Converters EHS20 – 2.5V Model EHS20-025 AIRFLOW DERATING Airflow from Vin to Vo Tj=120C 25 25 20 20 15 Iout (amps dc) Iout (amps dc) EHS20-025 AIRFLOW DERATING Air flow from Vo(+) to Vo(-) Tj=120C 100 LFM 200 LFM 10 15 100 LFM 200 LFM 10 300 LFM 300 LFM 5 5 400 LFM 400 LFM 0 20 30 40 50 60 70 Ambient temp (deg c) 80 0 90 20 30 40 50 60 Ambient temp (deg c) EHS20-025.Q4.16OCT03 70 80 90 EHS20-025.Q4.16OCT03 EHS20-025 Enable with Pre-Bias EHS20-025 Efficiency 91 Efficiency (%) 89 87 85 83 81 36 Vin 75 Vin 48 Vin 79 77 Q4.3.9.29 75 5 10 15 Output Voltage @ 0.5 V/div., 2 ms/div. Load Current = 0. Load capacitance = 10,000 uF 20 Output Current EHS20-025 Trim-up and Trim-down Resistance 1000 Trim Up/Down Formula : 2.5V model 5.10 Vnom ( 100 %) 1.225 % 510 10.2 K % Resistance (Kohms) Rup Rup (2.5 V) Rdown 100 Where % ( Vout Vnom) 100 and, Vout = Target output voltage Vnom Rdown ( % ) 510 Where 10.2 K % % ( Vnom Vout ) 100 Vnom 10 0% 2% 4% 6% Delta (%) 8% 10% www.murata-ps.com/support 3 EHS20-6200961507_D01_28/04/08 E Class Converters EHS20 – 2.5V Model EHS20-025 Startup Sequence from Vin EHS20-025 Startup Sequence from Enable Top Trace: Vout @ 1.0 V/div. Bot. Trace: Vin @ 20V/div. (48Vdc) Horiz. @ 50 ms/div. Top Trace: Vout @ 1.0 V/div. Bot. Trace: Venable @ 2 V/div. Horiz. @ 5 ms/div. EHS20-025 Transient Response 50- 25% step, 1A/μs EHS20-025 Transient Response 50-75% step ,1A/μs CH1: Vout AC coupled CH2 : Step up Current CH1: Vout AC coupled CH2 : Step down Current Load: 20 A, 0 uF, Turn-on delay: 110mS Load: 20 A. Vin: 48 V, 0 uF, Turn-on delay: 4.8 ms Input Current @ 5.0 mA/div., 20 us/div. (14 mApp) Input Voltage: 48 V, Load Current: 20A Note: refer to test circuit schematic EHS20-025 Output Ripple Voltage, Io=20A EHS20-025 Input Reflected Ripple www.murata-ps.com/support 4 EHS20-6200961507_D01_28/04/08 E Class Converters EHS20 – 2.5V 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 Enable Pin Connection Table NEGATIVE LOGIC VERSION POSITIVE LOGIC VERSION Note: ENABLE POWER SUPPLY OV < 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) OV < 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 EHS20-6200961507_D01_28/04/08 E Class Converters EHS20 – 2.5V 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 EHS20-6200961507_D01_28/04/08