AQ082W48V033V25AN AQ082W48V033V25AN AQ082W48V033V25AN 48V 25A 3.3V DC-DC Converter 48V 25A 3.3V DC-DC Converter iin n o ou utt o ou utt ,, High Efficiency, Isolated Quarter Brick High Efficiency, Isolated Quarter Brick Features Features Features · Very high efficiency: 91% · Wide input voltage range (36 to 75Vdc) · Low profile, industry standard footprint and pin out: 2.3" x 1.45" x 0.36" (58.4mm x 36.8mm x 9.35mm) · Total weight: 34g. (1.2oz.) · Remote ON/OFF · Output voltage trim · Remote sense · Fixed Frequency (Input-Output ripple 400 KHz) · Under voltage lockout (UVLO) – auto recover · Over voltage protection – auto recover · Over current protection – auto recover · Over temperature protection – auto recover · Operating temperature -40/+100°C · Input to Output Isolation at 2000Vdc,10M: · CSA/US, CSA, TUV and KEMA Certified · ISO 9001 Certified manufacturing processes Product Highlights Product Highlights Product Highlights · The AQ Family of dc-dc converters is Ault’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 (0.36”), open frame construction allows smaller card pitch and improves system ventilation. · Fixed switching frequency provides predictable EMI characteristics. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter 0.06 (2x) (1.5 (2x)) (58.42) 0.04 (6x) (3.68) (50.80) (1 (6x)) 1 8 7 2 6 5 3 4 BOTTOM VIEW SIDE VIEW 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com (36.83) 0.366 0.16 (9.30) (4) (10.8) (7.62) (7.62) 0.425 0.15x4 (10.8) (3.81x4) AQ082±48V±3.3V, High Efficiency DC-DC Converter Specifications Specifications Specifications (Typical value standard at nominal input line, full load, airflow 300 LFM, 25°C ambient temperature unless otherwise specified) Input Characteristics Notes & Conditions Min Typ Max Units Operating Input Voltage Range Note 1 36 48 75 V T< 10ms Input Surge Voltage 100 V Input Under-Voltage Lockout Turn-On Voltage Threshold 34.3 34.8 35.4 V Turn-Off Voltage Threshold 33.8 34.3 34.8 V Lockout Hysteresis Voltage 0.4 0.5 0.6 V Maximum Input Current V =36V; Full Load 2.59 A IN No-load Input Current 75 100 mA Off Converter Input Current 4 6 mA 2 Inrush Current Transient Rating 0.01 A s Input Reflected-Ripple Current RMS; see figures 1, 2 3 mA NOTE 1: NOTE 1: NOTE 1: Absolute max. input voltage 80V Output Characteristics Notes & Conditions Min Typ Max Units Output Voltage Set Point 50 % Load 3.28 3.30 3.32 V Output Voltage Regulation Load V = 48V ± 5 ± 8 mV nom Line I = 15A ± 2 ± 5 mV o Temperature ± 15 ± 30 mV Total Output Voltage Range 3.265 3.335 V Output Voltage Ripple and Noise 20 MHz bandwidth Peak to Peak Full load, 60 100 mV RMS see figures 1, 4 14 20 mV Operating Output Current Range I 0 - 25 A o Output DC Current Limit Inception 26 27 29 A Output DC Current Limit Shutdown See figure 5 2.75 2.88 3.05 V Voltage Admissible Output capacitance Full load, resistive 0 20000 mF Dynamic Characteristics Notes & Conditions Min Typ Units Max 470mF load cap, Output Voltage Current Transient 1A/ms; figures 8, 9 Positive Step Change 50%I to 75% I 170 mV o o Negative Step Change 75% I to 50% I 170 mV o o Settling Time to 1% 300 ms Turn-On Transient Figures 6 and 7 Overshoot 0 % Turn-On Time Full load 15 20 ms Start-Up Inhibit Period 120 ms Efficiency Notes & Conditions Min Typ Max Units 100% Load V = 48V 90.5 % IN 80% Load V = 48V 91.0 % IN 56% Load V = 48V 90.5 % IN Isolation Characteristics Notes & Conditions Min Typ Max Units Isolation Voltage - input to output Basic Isolation 2000 V DC Isolation Capacitance Basic Isolation 2200 pF MW Isolation Resistance 10 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter Feature Characteristics Min. Typ. Max Units Double Frequency for Switching frequency 190 200 210 kHz Input-Output Ripple ON/OFF Control Off-State Voltage 2.7 10 V On-State Voltage 0 0.5 V Output Voltage Trim Range -10 +10 % Output Voltage Remote Sense +10 % Range Output Over-Voltage Protection 115 125 130 % Overcurrent Protection Threshold 26-35 A Average PCB Over-Temperature shutdown 125 °C temperature General Characteristics Notes & Conditions Min Typ Max Units Operating Range Temperature Maximum Rating -40 +100 °C Storage Temperature Maximum Rating -50 +120 °C Relative Humidity Non condensing 5 95 % Bellcore Issue 4 Calculated MTBF Min. 1,500,000 hours RDF93 HRD Issue 5 Safety and Regulatory TUV and KEMA certified for compliance to EN06950 requirements CSA 22.2 No. 950-95(US and Canada) certified with basic insulation for compliance to UL 1950. 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 Characteristic Curves Characteristic Curves Characteristic Curves Figure 3 Figure 2 Figure 4 DC/DC Vout Is Converter - Ic - Cerami c cap ESR FIGURE 1: Set-up diagram showing measurement points for: Input Terminal Ripple Current, Input Reflected Ripple Current and Output Voltage Ripple 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter FIGURE 2: Input Reflected Ripple Current, set-up per FIGURE 3: Input Terminal Ripple Current, set-up per figure 1; 10mH source impedance. Nominal figure 1, 10mH source impedance and 47mF input voltage at full rated load. electrolytic capacitor Nominal input voltage at full rated load. FIGURE 4: Output Voltage Ripple, set-up per figure 1, 1mF FIGURE 5: Load current as a function of time while ceramic capacitor and 10mF tantalum capacitor. attempting to enable into a short circuit, <10mW. Nominal input voltage at full rated load 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter FIGURE 6: Turn-on transient at full rated load. FIGURE 7: Turn-on transient at zero load. Upper trace: input voltage. Upper trace: input voltage Lower trace: output voltage Lower trace: output voltage FIGURE 8: Output voltage response to dynamic change in load FIGURE 9: Output voltage response to step-change in load current: 75% I to 50%I , where: current. 50%I to 75% I , where: o o o o di / dt = 0.1A / ms di / dt = 1A / ms Load cap: 10mF, 100 mW ESR tantalum Load cap: 470mF, 30 mW ESR tantalum capacitor and 1mF ceramic capacitor capacitor and 1mF ceramic capacitor 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter 95 90 85 36V 48V 75V 80 75 70 4 6 8 10 12 14 16 18 20 22 25 output current [A] FIGURE 10: Efficiency vs. load current for listed input voltages at 25°C 12 10 8 36V 6 48V 75V 4 2 0 1 2 3 4 5 6 7 8 9 10 11 Output Current [A] FIGURE 11: Power dissipation vs. load current for listed input voltages at 25°C 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com Power Dissipation [W] Efficiency % AQ082±48V±3.3V, High Efficiency DC-DC Converter 25 127 20 118 109 15 100 400 LFM 91 10 300 LFM 82 200LFM 73 5 100 LFM 64 0 55 0 25 40 55 70 85 Ambient Air Temperature (°C) FIGURE 12: Maximum output power derating curves vs. FIGURE 13: Thermal plot of converter: 25 A load, with ambient air temperature for airflow rates of 100 LFM 55°C air flowing at the rate of 200 LFM. Air is flowing through 400 LFM with air flowing across the converter from across the converter from pin 1 to pin 3, at nominal input pin 1 to pin 3 at nominal input voltage. voltage. 25 128 119 20 110 15 101 92 10 83 400 LFM 300 LFM 74 5 200LFM 100 LFM 65 0 LFM 0 56 0 25 40 55 70 85 Ambient Air Temperature (°C) FIGURE 15: Thermal plot of converter: 25 A load, with 55°C air FIGURE 14: Maximum output current derating curves vs. flowing at the rate of 200 LFM. Air is flowing across the ambient air temperature. Airflow rates of 0 LFM through converter from input to output, at nominal input voltage. 400 LFM with air flowing lengthwise from output to input at nominal input voltage. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com Iout (A) Iout (A) AQ082±48V±3.3V, High Efficiency DC-DC Converter Features and Pins description Features and Pins description Features and Pins description 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 (-) V Viin n ( (- -) ) Vin (-) Negative logic (permanently Enabled) Open Collector Enable Circuit Direct Logic Drive Remote Enable Circuit TRIM The output voltage can be trimmed by means of an external resistor connected between Trim (pin 6) and +Sense (pin 5) or -Sense (pin 7). 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 D% of the nominal output voltage, calculate the value of the external resistor using the following equation: æ ö - 511 æ ö 3.3 V target ç ÷ R = -10.22kW where D = ´100% trim-down ç ÷ ç ÷ D% è ø 3.3 è ø An external resistor connected between Trim and +Sense pins will increase the output voltage. For an increase of D% of the nominal output voltage, calculate the value of the external resistor using the following equation: 5.11*3.3 (100 + D%) æ 511 ö ç ÷ R = - -10.22 KW trim-up ç ÷ 1.225D% D% è ø 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ082±48V±3.3V, High Efficiency DC-DC Converter 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). THERMAL CONSIDERATIONS The converter has internal thermal protection preventing hot spots on PCB from exceeding 120°C (248 °F), reference Figures 13 and 15. Margin to the temperature protection limit should be verified in the application. During an abnormal condition that induces 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. OVER CURRENT PROTECTION The overcurrent limit inception is typically 110% of the rated output current. When the overcurrent limit inception is exceeded the output voltage will decrease proportional to the increase in the load current. Further increase in the load current will cause the output voltage to trip the under voltage protection threshold and 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. Ordering code Ordering code Ordering code AQ082W48V033V25AN Option code Option code Option code -P for Positive Logic, example AQ082W48V033V25AN-P -PL for Cold Plate, example AQ082W48V033V25AN-PL 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com