HEHB-70A-48V-1.2V 48Vin 70Aout 1.2Vout DC-DC Converter High Efficiency, Isolated Half Brick FFeeaattuurreess * * * * * * * * * * * * * * * * * * * Very high efficiency: 88% at 30A load, 84% at full rated load current Wide input voltage range (35 to 75Vdc) Total weight: 77 grams (2.67 oz.) Open-Frame Version Low profile, industry standard footprint and pinout: 2.3" x 2.4" x 0.44" (58.4mm x 61.0mm x 11.2mm) Back Bias protection Monolithic start-up, with pre-biased output Parallel for increased power: External Clock Synchronization (Option) Current Share, Primary (Option) Soft Start Remote ON/OFF Output voltage trim - Industry standard trim equation Remote sense Fixed Switching Frequency (Output ripple frequency @ 420 KHz) Under voltage lockout (UVLO), Input - auto recover Over voltage protection - auto recover Over current protection - auto recover Over temperature protection - auto recover Operating temperature range: -40C to +100C Input to Output Isolation at 2000Vdc, 10M Pending- UL/CUL, CSA/CSAUS, TUV and KEMA ISO 9001 Certified manufacturing processes P Prroodduucctt H Hiigghhlliigghhttss * * * * P/N 7A04I4WHXXX HEHB Family of dc-dc converters is Magnetek's solution for next generation, cutting-edge board applications. Synchronous rectification uses MOSFET instead of Schottky diodes providing extreme reduction in heat generation, boosting efficiency, eliminating the need for a heat sink and increased reliability. Low profile (0.44"), open frame construction allows smaller card pitch and improves system ventilation. Fixed switching frequency provides predictable EMI characteristics. DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 1 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V M Meecchhaanniiccaall D Drraaw wiinnggss - All dimensions are in inches (mm) Tolerances: x.xx in. +/-0.2 in. (0.5mm) PINOUT Description Pin 1 2 A 3 4 5 6 7 8 9 P/N 7A04I4WHXXX Name Vin (-) (No Pin) (No Pin) ON/OFF Vin (+) Vout (+) Sense (+) TRIM Sense (-) Vout (-) Function Negative terminal for the input bus Optional Current Share, -F OnlyExternal input signal. Optional Clock Sync, -F Only Remote Enable/Disable terminal, input signal TTL Positive terminal for the input bus Positive terminal for output voltage Positive remote sense Output voltage TRIM Negative remote sense Return terminal for output voltage DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 2 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V SSppeecciiffiiccaattiioonnss (Typical values are at nominal input line, full load, airflow 300 LFM, 25C ambient temperature unless otherwise specified) Input Characteristics Notes & Conditions Note 1 T< 100msec Operating Input Voltage Range Input Surge Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Min 35 No-load Input Current Off Converter Input Current 60 11 Inrush Current Transient Rating RMS; see figures 6,7,8 Input Reflected-Ripple Current Output Characteristics Notes & Conditions 50 % Load 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 (hiccup mode: 30msec ON, 220msec OFF) Admissible Output Capacitance Dynamic Characteristics Output Voltage during Load Current Transient Step Change in IOUT (0.1A/s) Step Change in IOUT (1A/s) Settling Time to 1% of Vout nom Turn On Transient Turn On Time Efficiency over sample, line, load, temperature and life 20 MHz bandwidth Full load see figures 6 & 9 Min 1.188 Units V V 34.4 33.1 V V V 2.9 A 70 13 mA mA 2 0.03 As TBA mA Typ 1.2 Max 1.212 Units V 5 4 5 8 6 15 mV mV mV 1.236 V 80 20 70 mV mV A 1.164 0 50 10 - See Figure 5 77 84 A Full load, resistive 0 50,000 F Notes & Conditions 15F load cap. 5A/s; see figure 3,4 50% to 75% Iout max 75% to 50% Iout max Min Max Units 200 mV mV s 200 ms Typ 65 130 See figures 1, 2 Full load 10,000 F load capacitance, Iout= 0A Notes & Conditions 100% Load 75% Load 50% Load Max 75 100 TBA VIN=35V; Full Load at nominal output voltage Maximum Input Current (IINmax) Output Voltage Overshoot Typ 48 160 0 Min Vin = 50V Typ 84 86 88 % Max Units % % % NOTE 1 : Absolute max. continuous input voltage = 80V (operating) ; 100V (Surge). P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 3 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V Isolation Characteristics Notes & Conditions Min Isolation Voltage input to output Basic isolation 2000 Isolation Voltage Input to plate Basic isolation 2000 Isolation Capacitance Isolation Resistance General Characteristics Operating Range Temperature Storage Temperature Relative Humidity Calculated MTBF Max Units VDC VDC 3300 pF M 10 Notes & Conditions With appropriate power derating Maximum Rating Non condensing Bellcore Issue 4 RDF93 HRD Issue 5 Feature Characteristics Max Units -40 Min +100 C -50 5 +120 95 C % Typ TBA Min. Switching frequency ON/OFF Control Off-State Voltage On-State Voltage Output Voltage Trim Range Output Over-Voltage Protection Over-Temperature shutdown Typ 1.5 0 -20 115 PCB Hot spot Typ. 420 120 125 Max Units kHz 5 1.2 +10 130 V V % % C Safety and Regulatory (PENDING) TUV and KEMA certified for basic insulation compliance to EN06950 requirements UL and CSA 22.2 No. 950-95(US and Canada) certified with basic insulation for compliance to UL60950. Note : An external input fuse must always be used for compliance to listed safety requirements. CE compliant per 72/23/EEC (Low voltage directive) and 93/68/EEC to facilitate CE Mark at system level. Material flammability rating, UL94V-0 NEBS compliant P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 4 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V PPeerrffoorrm maannccee C Cuurrvveess Figure 1. Vout, Turn-on transient at full rated current (resistive load) (Vin=48V) (5 ms/div, 0.5V/div) Figure 3. Output voltage response to dynamic change in load current: 75% Io to 50%Io , where: di / dt = 5 A / s Load capacitance: 15F, 30 m ESR tantalum 1F ceramic capacitor P/N 7A04I4WHXXX Figure 2. Vout, Turn-on transient at NO load (Vin=48V) (5 ms/div, 0.5V/div) Figure 4. Output voltage response to dynamic change in load current: 75% Io to 50%Io , where: di / dt = 1 A / s Load capacitance: 15F, 30 m ESR tantalum 1F ceramic capacitor DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 5 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V Figure 5. Load current as a function of time while attempting to enable into a short circuit, <10m. Figure 7 Figure 9 Source impedance - Is Ic DC/DC Converter Vout - Cerami c cap ESR Figure 6. P/N 7A04I4WHXXX Tantalum cap Test set-up diagram showing measurement point for Input Reflected Ripple Current and Output Voltage Ripple. DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 6 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V To be provided in the next issue To be provided in the next issue Figure 7. Input Reflected Ripple Current, set-up per figure 6; 10H source impedance. Nominal input voltage at full rated load. Figure 8. Input terminal ripple current (ic) at full rated load and nominal input voltage. Figure 9. Output Voltage Ripple at Nominal input voltage and full rated load, set-up per figure 6, where: Bandwidth; 20kHz Load Capacitance; 15F electrolytic capacitor 1F ceramic capacitor P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 7 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V Figure 10. Efficiency vs. load current for minimum, nominal and maximum input voltage at 25C. Figure 11 .Power dissipation vs. load current for minimum, nominal and maximum input voltage at 25C. P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 8 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V Figure 12: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing from input to output and nominal input voltage. To be provided in the next issue Figure 13: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin 1 to pin 4, Transversal and nominal input voltage. P/N 7A04I4WHXXX To be provided in the next issue DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 9 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V FFeeaattuurreess aanndd PPiinnss ddeessccrriippttiioonn REMOTE ON-OFF CONTROL The default logic is negative, where the Remote On/Off (pin 2) input is referenced to -Vin (pin 1). The Remote On/Off signal must be lower than 0.8V to enable the output voltage, and higher than 2.7V to disable the output voltage. Positive logic is an available option, add "-P" to the end of the ordering code. ON /OFF ON /OFF ON /OFF Vin (-) Vin (-) Vin (-) Negative logic Direct Logic Drive Open Collector Enable Circuit (permanently Enabled) Remote Enable Circuit Vin (-) TRIMMING The output voltage can be trimmed by means of an external resistor connected between Trim (pin 6) and +Sense (pin 6) or -Sense (pin 8). The selection of the resistor follows the industry standard trim equation. An external resistor connected between Trim and -Sense pins will decrease the output voltage. For a decrease of % of the nominal output voltage, calculate the value of the external resistor using the following equation: 100% Rtrim-down = - 2k , where = V nominal - V target x 100% V nominal Trim Resistance (kOhms) TRIM DOWN 1000 100 10 1 0 2 4 6 8 10 12 14 16 18 20 % Decrease in Output Voltage P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 10 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V A resistor connected between Trim and + S pins will increase the output voltage. For a desired increase of % of the nominal output voltage, the value of the resistor should be: Rtrim-up V nom - 2 * + V V tar V nom ref k , = V tar - V nom Where Vnom = Nominal Voltage, Vtar = Target Voltage, Vref =1.225 V Trim Resistance (kOhms) TRIM UP 1000 100 10 0 1 2 3 4 5 6 7 8 9 10 % Increase in Output Voltage SENSE (+ or -) The +Sense or -Sense pins must be connected to the load or output pins of the converter. To ensure tight regulation at the system critical load, then the remote sense pins should be connected to the system critical load. Reference applicable section of data sheet for maximum voltage compensation. Ensure sufficient margin to the over voltage threshold, review applicable sections of the data sheet and system loading: output over-voltage protection -Vs- system transient load condition(s). P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 11 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V THERMAL CONSIDERATIONS The converter has internal thermal protection preventing hot spots on PCB from exceeding MFR's recommended temperatures for reliable operation, reference over temperature protection threshold (Section: Feature Characteristics). Margin to the temperature protection limit should be verified in the application, and should not exceed 120C on the thermal reference points as shown in Figure 14. During an abnormal condition inducing an increase in the converter temperature, the converter output voltage will fold back when the over temperature protection threshold is reached. The converter will auto-recover when the fault condition is corrected and time allowed for the converter to cool down. Figure 14, Thermal reference points To be provided in next issue. OVER CURRENT PROTECTION The overcurrent limit inception is typically 110% of the rated output current will cause the output voltage enter fault protection, or hiccup reference Figure 5. The converter will enter fault protection typically at 125% of rated output current. When the fault is removed the converter will auto recover. P/N 7A04I4WHXXX DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 12 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com HEHB-70A-48V-1.2V O Orrddeerriinngg iinnffoorrm maattiioonn:: Product Family Code Rated Option 1Input Output Output Remote On/Off Voltage Voltage Current Logic HEHB 70A 48V 1.2V Default Negative P Positive Example HEHB-70A-48V-1.2V-PPLF1 Europe Magnetek S. p. A Via S.Giorgio 642 52028- Terranuova Bracciolini, Arezzo, Italy Phone: (+39) 055.9195.1 Fax: (+39) 055.9195.248 P/N 7A04I4WHXXX Option 2Mechanical Option 3Parallel Functions Option 4Pin Length Default Open Frame PL Cold Plate DefaultAE None FAE Clock Sync & Current share Default 0.15" 1 0.25" 2 0.11" Standard Half Brick with Positive Logic Remote On/Off, Cold Plate, (Clock Sync and Current Share) and 0.25" pin length options. US Magnetek Inc. 8966 Mason Avenue Chatsworth, CA 91311, USA Phone: (+1) 818.727.2216 Fax: (+1) 818.727.2276 Toll-Free Number: (+1) 800.621.0733 DS HEHB 70A 48V 1.2V 7A04 Rev.01-07-03.doc- page 13 - PPrreelliim miinnaarryy Magnetek PEG web site, www.magnetekpower.com