FEATURES High efficiency: 90% @5V/20A Size: 58.4mm x 22.8mm x 9.5mm (2.30”x0.90”x0.37”) Industry standard pin out Fixed frequency operation Input UVLO, Output OTP, OCP, OVP Monotonic startup into normal and pre-biased loads Very fast transient response 2250V Isolation and basic insulation No minimum load required SMD and through-hole versions No negative current during power or enable on/off ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada) recognized, and TUV (EN60950) certified CE mark meets 73/23/EEC and 93/68/EEC Delphi Series E48SH, 120W Eighth Brick Family DC/DC Power Modules: 48V in, 5V/20A out The Delphi Series E48SH Eighth Brick, 48V input, single output, isolated DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing ― Delta Electronics, Inc. This product family is available in either a through-hole or surface-mounted package and provides up to 120 watts of power or 50A of output current (1.2V and below) in an industry standard footprint and pinout. The E48SH converter operates from an input voltage of 36V to 75V and is available in output voltages from 1.0V to 15V. Efficiency is up to 90% for 5V output at 20A full load. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. All models are fully protected from abnormal input/output voltage, current, and temperature conditions. The Delphi Series converters meet all safety requirements with basic insulation. directive OPTIONS Positive On/Off logic Short pin lengths available External Synchronization Output OVP latch mode Output OCP latch mode Heat spreader APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment DATASHEET DS_E48SH05020_02272007 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS E48SH05020 (Standard) Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) Operating Temperature Storage Temperature Input/Output Isolation Voltage INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current No-Load Input Current Off Converter Input Current Inrush Current(I2t) Input Reflected-Ripple Current Input Voltage Ripple Rejection OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Load Over Line Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception DYNAMIC CHARACTERISTICS Output Voltage Current Transient Positive Step Change in Output Current Negative Step Change in Output Current Settling Time (within 1% Vout nominal) Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From Input Maximum Output Capacitance EFFICIENCY 100% Load 60% Load ISOLATION CHARACTERISTICS Input to Output Isolation Resistance Isolation Capacitance FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, Negative Remote On/Off logic Logic Low (Module On) Logic High (Module Off) ON/OFF Control, Positive Remote On/Off logic Logic Low (Module Off) Logic High (Module On) ON/OFF Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection GENERAL SPECIFICATIONS CMTBF Weight Over-Temperature Shutdown 100ms Refer to Figure 21 for measuring point Typ. -40 -55 Vdc Vdc °C °C Vdc 75 Vdc 33 31 1 34 32 2 35 33 3 3.7 120 10 1 Vdc Vdc Vdc A mA mA A2s mA dB 5.0 5.05 Vdc ±3 ±3 ±25 ±10 ±10 5.1 mV mV mV V 40 10 60 20 20 140 mV mV A % 60 60 30 100 100 mV mV us 15 15 25 25 10000 ms ms µF P-P thru 12µH inductor, 5Hz to 20MHz 120 Hz Output Voltage 10% Low 75 100 129 125 2250 48 60 3 Io=Io,min to Io,max Vin=36V to 75V Tc=-40°C to 85°C over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Units 36 100% Load, 36Vin Vin=48V, Io=Io.max, Tc=25°C Max. 20 50 4.95 4.9 0 110 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs 50% Io.max to 75% Io.max 75% Io.max to 50% Io.max Full load; no overshoot of Vout at startup 90 91.5 % % 2250 10 Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 µA Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 µA Ion/off at Von/off=0.0V Logic High, Von/off=15V Across Pins 9 & 5, Pout ≦ max rated power Pout ≦ max rated power Over full temp range; % of nominal Vout Io=80% of Io, max; 300LFM @25℃ Refer to Figure 21 for measuring point 1500 Vdc MΩ pF 250 kHz 0 3 1.2 50 V V 0 3 1.2 50 1 50 10% 10 130 V V mA uA % % % -20% 118 2.57 25 135 M hours grams °C E48SH05020_02272007 2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C. 4 3.5 INPUT CURRENT(A) 3 2.5 2 1.5 1 0.5 0 30 34 38 42 46 50 54 58 62 66 70 74 INPUT VOLTAGE(V) Figure 3: Typical full load input characteristics at room temperature. E48SH05020_02272007 3 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 4: Turn-on transient at zero load current (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input, 5V/div. Figure 5: Turn-on transient at full rated load current (constant current load) (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input, 5V/div. For Input Voltage Start up Figure 6: Turn-on transient at zero load current (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div, Bottom Trace: input voltage, 50V/div. Figure 7: Turn-on transient at full rated load current (constant current load) (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: input voltage, 50V/div. E48SH05020_02272007 4 ELECTRICAL CHARACTERISTICS CURVES Figure 8: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Trace: Vout (50mV/div, 100us/div), Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 9: Output voltage response to step-change in load current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Trace: Vout (50mV/div, 100us/div), Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 10: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 µH. Capacitor Cs offset possible battery impedance. Measure current as shown above. Figure 11: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200 mA/div, 2us/div). E48SH05020_02272007 5 ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) 10u 1u SCOPE RESISTIVE LOAD Vo(-) Figure 12: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div). Figure 13: Output voltage noise and ripple measurement test setup. Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=20A)(50 mV/div, 2us/div) Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points. E48SH05020_02272007 6 DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few µH, we advise adding a 10 to 100 µF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability. Layout and EMC Considerations Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Application notes to assist designers in addressing these issues are pending release. Safety Considerations The power module must be installed in compliance with the spacing and separation requirements of the end-user’s safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements. Basic insulation based on 75 Vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this DC-to-DC converter is identified as TNV-2 or SELV. An additional evaluation is needed if the source is other than TNV-2 or SELV. When the input source is SELV circuit, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met: The input source must be insulated from the ac mains by reinforced or double insulation. The input terminals of the module are not operator accessible. If the metal baseplate is grounded, one Vi pin and one Vo pin shall also be grounded. A SELV reliability test is conducted on the system where the module is used, in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the module’s output. When installed into a Class II equipment (without grounding), spacing consideration should be given to the end-use installation, as the spacing between the module and mounting surface have not been evaluated. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a normal-blow fuse with 10A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current. Soldering and Cleaning Considerations Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team. E48SH05020_02272007 7 FEATURES DESCRIPTIONS Vi(+) Vo(+) Over-Current Protection The E48SH modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. When the output current exceeds the OCP set point, the current limit function will work by initially reduce duty cycle of the module, the unit will go out of regulation but remains in safe operating area before the output drops below 50%. When output drops below 50%, the modules will automatically shut down and enter hiccup mode. During hiccup, the modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected. Over-Voltage Protection The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the over-voltage set point, the module will shut down and restart after 200mS. latch off mode is optional. Under latch off mode the over-voltage latch is reset by either cycling the input power or by toggling the on/off signal for one second. Sense(+) ON/OFF Sense(-) Vi(-) Vo(-) Figure 16: Remote on/off implementation Remote Sense Remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. The voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here: [Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout This limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim). Vi(+) Vo(+) Over-Temperature Protection Sense(+) The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down. The module will keep checking the temperature of module after shutdown. If the temperature decreases more than the hysterisis temperature (typical 15℃), the module will re-start. Otherwise the module will keep off. Remote On/Off The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low. Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain. For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin to floating. E48SH05020_02272007 Sense(-) Contact Resistance Vi(-) Vo(-) Contact and Distribution Losses Figure 17: Effective circuit configuration for remote sense operation If the remote sense feature is not used to regulate the output at the point of load, please connect SENSE(+) to Vo(+) and SENSE(–) to Vo(–) externally during application. The output voltage can be increased by both the remote sense and the trim; however, the maximum increase is the larger of either the remote sense or the trim, not the sum of both. When using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Care should be taken to ensure that the maximum output power does not exceed the maximum rated power. 8 FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pin should be left open if this feature is not used. If the external resistor is connected between the TRIM and SENSE (+) the output voltage set point increases (Fig. 19). The external resistor value required to obtain a percentage output voltage change △% is defined as: Rtrim − up = 5 . 11 Vo (100 + ∆ ) 511 − − 10 . 2 (K Ω ) 1.225 ∆ ∆ Ex. When Trim-up +10%(5V×1.1=5.5V) Rtrim − up = 5 .11 × 5 × (100 + 10 ) 511 − − 10 .2 = 168 (K Ω ) 1.225 × 10 10 The output voltage can be increased by both the remote sense and the trim, however the maximum increase is the larger of either the remote sense or the trim, not the sum of both. Figure 18: Circuit configuration for trim-down (decrease output voltage) If the external resistor is connected between the TRIM and SENSE (-) pins, the output voltage set point decreases (Fig. 18). The external resistor value required to obtain a percentage of output voltage change △% is defined as: Rtrim − down = 511 − 10 .2 (K Ω ) ∆ Ex. When Trim-down -10%(5V×0.9=4.5V) Rtrim − down = 511 − 10 .2 = 40 .9 (K Ω ) 10 When using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. Frequency Synchronization This product family can be synchronized with external clock signal to the TRIM pin. This reduces system noise and interference in multiple converter systems. Figure 19: Circuit configuration for trim-up (increase output voltage) E48SH05020_02272007 9 THERMAL CONSIDERATIONS Thermal Derating Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. Heat can be removed by increasing airflow over the module. The hottest point temperature of the module is 129℃. To enhance system reliability; the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected. THERMAL CURVES Thermal Testing Setup Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25’’). Figure 21: Temperature measurement location ＊ The allowed maximum hot spot temperature is defined at 129℃ Output Current(A) E48SH05020(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Transverse Orientation) 600LFM 500LFM 20 18 PWB FACING PWB MODULE Natural Convection 16 100LFM 14 12 200LFM 300LFM 10 400LFM 8 AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 6 4 50.8 (2.0”) 2 0 AIR FLOW 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 22: Output current vs. ambient temperature and air velocity @ Vin=48V (Transverse Orientation) 12.7 (0.5”) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 20: Wind tunnel test setup E48SH05020_02272007 10 PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL RECOMMENDED PAD LAYOUT (SMD) E48SH05020_02272007 11 LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Temperature (°C ) 250 200 150 Ramp-up temp. 0.5~3.0°C /sec. 2nd Ramp-up temp. Peak temp. 1.0~3.0°C /sec. 210~230°C 5sec. Pre-heat temp. 140~180°C 60~120 sec. Cooling down rate <3°C /sec. 100 Over 200°C 40~50sec. 50 0 60 120 Time ( sec. ) 180 240 300 Note: The temperature refers to the pin of E48SH, measured on the pin +Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE Temp. Peak Temp. 240 ~ 245 ℃ 217℃ Ramp down max. 4℃/sec. 200℃ Preheat time 100~140 sec. 150℃ Time Limited 90 sec. above 217℃ Ramp up max. 3℃/sec. 25℃ Time Note: The temperature refers to the pin of E48SH, measured on the pin +Vout joint. E48SH05020_02272007 12 MECHANICAL DRAWING (WITHOUT HEATSPREADER) SURFACE-MOUNT MODULE Pin No. 1 2 3 4 5 6 7 8 Name +Vin ON/OFF -Vin -Vout -SENSE TRIM +SENSE +Vout THROUGH-HOLE MODULE Function Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage E48SH05020_02272007 13 MECHANICAL DRAWING (WITH HEATSPREADER) THROUGH-HOLE MODULE E48SH05020_02272007 14 PART NUMBERING SYSTEM E 48 S H 050 20 N R Type of Product Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length/type E- Eighth Brick 48-36V~75V S- Single H-50A series 050 – 5.0V 20 -20A N- Negative R- 0.170” P- Positive N- 0.145” F A Option Code F- RoHS 6/6 A - Standard functions (Lead Free) H - With heatspreader K- 0.110” M- SMD MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD E48SH1R250NRFA 36V~75V 2.3A 1.2V 50A 86.5% E48SH1R540NRFA 36V~75V 2.2A 1.5V 40A 89% E48SH1R840NRFA 36V~75V 2.7A 1.8V 40A 90% E48SH2R535NRFA 36V~75V 2.9A 2.5V 35A 89.5% E48SH3R330NRFA 36V~75V 3.6A 3.3V 30A 92% E48SH05020NRFA 36V~75V 3.7A 5.0V 20A 90% E48SH12010NRFA 36V~75V 4.3A 12V 10A 93% Default remote on/off logic is negative and pin length is 0.170” For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office. CONTACT: www.delta.com.tw/dcdc USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: [email protected] Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 x 6220 Fax: +886 3 4513485 Email: [email protected] WARRANTY Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice. E48SH05020_02272007 15