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Description

24 W, 36 -75 VDC Vin, Single Output, 1.2 VDC@20 A DC-DC Converter
EHS20-012-1B

Part Number

EHS20-012-1B

Price

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Manufacturer

MURATA POWER SOLUTIONS

Lead Time

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Category

Capacitors » DC-DC Converter

Specifications

Manufacturer

Murata Power Solutions

Manufacturers Part #

EHS20-012-1B

Lead Time

16 Week Lead Time

Series

EHS20-012

Factory Pack Quantity

Dimensions

2.30 x 0.82 x 0.37"

Efficiency

85%

Input Voltage Nominal

48 VDC

Isolation

1500 VDC

Mechanical Style

Isolated

Mounting

Through Hole

Number of Outputs

Operating Temperature

- 40 to + 90°C

Output Amps 1

20 A

Output Voltage V1 Nominal

1.2 VDC

Power

24 W

Subcategory

DC-DC Converter

Datasheet

cdc_ehs20-012.pdf

287 KiB

Download

Extracted Text

E Class Converters EHS20 – 1.2V Model Model 1.2V Units Parameter Output Voltage Setpoint 1.18 – 1.22 Vdc Line/Load Regulation Max 0.1% / 0.2% % Vo Output total regulation 1.16 – 1.24 Vdc Output adjust (note 4) 90-110 %Vo,nom Remote-sense Comp. 10% V Output Ripple & Noise (note 2) Max 100 mVp-p Output Current 0-20 A Efficiency (48V, Full load, 25C) Typ 85% % 1,000-10,000 External Capacitance μF Transient Response (typ) (note 3) 150 mV ΔVo 400 25% step, 1A/μs Ts μs Over-voltage trip point (latching) 1.5 – 1.8 V Over-current trip point (non-latching) Typ 25 A All specifications, waveforms, charts at Ta=25C, Vin=48V, unless otherwise specified 1 EHS20-012-6200991518 E Class Converters Murata Power Solutions EHS20 – 1.2V Model Parameter Conditions Min. Typ. Max. Units Input Input Voltage (Vin) 36 48 75 Vdc Reflected Ripple Current See note (1) 25 ‘mA p-p 2 Inrush Transient 0.2 A s 100mS 10% duty Input Voltage Transient 100 V cycle Undervoltage Lockout Turn-on 32 35 Vdc (non-latching)Turn-off 31 34 Vdc Over-voltage lockout (non-latching)Turn-off 77 81 Vdc Isolation Input-Output 1500 Vdc Resistance; input-output 10 Mohm Temperature Operating Ambient -40 90 °C Storage -40 125 °C Protection Over-Temperature (non-latching)Measured on PCB 130 °C Physical Information Dimensions 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 MTBF Demonstrated at 40C ambient with 90% confidence: 2,800,000 Hrs Complies with IEC/EN/CSA/UL 60950, provides basic insulation, input to output. Safety c-UL-us (US and Canada) recognized, TUV certified (Bauart). 2 EHS20-012-6200991518 E Class Converters Murata Power Solutions EHS20 – 1.2V Model EHS20-012 Thermal Derating EHS20-012 Thermal Derating Airflow from Vin to Vo, Tj = 120ºC Airflow from Vo(-) to Vo(+), Tj= 120ºC 25 25 20 20 15 15 400 LFM 300 LFM 400 LFM 300 LFM 10 200 LFM 100 LFM 10 200 LFM 100 LFM 5 5 25 35 45 55 65 75 85 25 35 45 55 65 75 85 Ambient Temperature [ºC] Ambient Temperature [ºC] EHS20-012 Enable with Pre-Bias EHS20-012 Efficiency 95 90 85 80 75 70 65 Vin=36V 60 Vin=48V Vin=75V 55 Output Voltage @ 0.2 V/div., 2 ms/div. 50 Prebias voltage =0.6 Vdc. Input Voltage 48 V 45 Load = 0 A, Load capacitance = 10000 uF. 40 4 6 8 1012141618 2022 24 Iout [Adc] EHS20-012 Trim-up and Trim-down Resistance Trim Up/Down Formula : 1.2V model 1000 5.10 Vnom() 100 % 510 Rup (1.2 V) Rup 10.2 K Rdown (1.2 V) 0.6 % % Where ( Vout Vnom) 100 and, Vout = Target output voltage 100 % Vnom Where 510 ( Vnom Vout) 100 Rdown() % 10.2 K % Vnom % 10 0% 2% 4% 6% 8% 10% Delta (%) 3 EHS20-012-6200991518 Output Current [A] Efficiency [%] Output Current [A] Resistance (Kohms E Class Converters Murata Power Solutions EHS20 – 1.2V Model EHS20- 012 Startup Sequence from Enable EHS20- 012 Startup Sequence from Vin Top Trace: Vout @ 0.5 V/div. Top Trace: Vout @ 0.5 V/div. Bot. Trace: Vin @ 50V/div. Bot. Trace: Venable @ 2 V/div. Horiz. @ 50 ms/div. Horiz. @ 5 ms/div. Load: 20 A. Turn-on delay: 110mS Load: 20 A, 10000 uF Turn-on delay: 4.38 ms EHS20-012 Transient Response 50-75% step ,1A/μs EHS20-012 Transient Response 50- 25% step, 1A/μs CH1: Vout AC coupled CH1: Vout AC coupled CH2 : Step up Current (2A/div) CH2 : Step down Current (2A/div) EHS20- 012 Input Reflected Ripple Current EHS20-012 Output Ripple Voltage, Io=20A Input Current @ 5 mA/div., 20 us/div. (9.2 mApp) Input Voltage: 48 V, Load Current: 20 A Note: see test circuit on following page. 4 EHS20-012-6200991518 E Class Converters Murata Power Solutions EHS20 – 1.2V Model Notes: 1. Input Reflected Ripple is specified when measured with the filter shown below i i s c L2 Vin 12uF DC-DC Converter 220uF, 33uF, ESR<0.1 Ohm s 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. 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(-). EHS20-012 Enable Pin Connection Table ENABLE POWER SUPPLY DISABLE POWER SUPPLY NEGATIVE LOGIC VERSION 0V < Venable < 0.8V 2.5V < Venable < 15V (internal pull-up > 50Kohms @ (external pull-up > 1Kohms) 5V) POSITIVE LOGIC VERSION 2.5V < Venable < 15V 0V < Venable < 0.8V (external pull-up > 1Kohms) (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. 5 EHS20-012-6200991518 E Class Converters Murata Power Solutions EHS20 – 1.2V Model Part Number Designations 6 EHS20-012-6200991518

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