AQ045W48V018V25AN AQ045W48V018V25AN AQ045W48V018V25AN 4 48 8V V 2 25 5A A 1 1..8 8V V H Hiig gh h E Ef ff fiic ciie en nc cy y,, IIs so olla at te ed d in out out in out out Q Qu ua ar rt te er r B Br riic ck k D DC C- -D DC C C Co on nv ve er rt te er r Features Features Features · Very high efficiency: 88.5% · 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 AQ045W±48V±1.8V 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) AQ045W±48V±1.8V 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 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 (I ) V =36V; Full Load 1.45 A INmax IN No-load Input Current 40 60 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 N NO OT TE E 1 1:: NOTE 1: Absolute max. input voltage 80V Output Characteristics Notes & Conditions Min Typ Max Units Output Voltage Set Point 50% Load 1.757 1.8 1.803 V Output Voltage Regulation Load V = 48V ± 2 ± 5 mV nom Line I = 15A ± 2 ± 5 mV Temperature ± 10 ± 20 mV Total Output Voltage Range 1.775 1.825 V Output Voltage Ripple and Noise 20 MHz bandwidth Peak to Peak Full load; 48 100 mV see figure 1, 4 RMS 13 20 mV Operating Output Current Range 0 - 25 A Output DC Current Limit Inception 26 27 29 A Output DC Current Limit Shutdown See figure 5 1.44 1.47 1.53 V Voltage Admissible Output Capacitance Full load, resistive 0 20.000 mF Dynamic Characteristics Notes & Conditions Min Typ Max Units 470mF load cap, Output Voltage Current Transient 1A/ms; figures 8, 9 Positive Step Change 50%I to 75% I 150 mV o o Negative Step Change 75% I to 50% I 150 mV o o Settling Time to 1% 200 ms Turn-On Transient Figures 6 and 7 Overshoot 0 % Turn-On Time Full load 15 25 ms Start-Up Inhibit Period 120 ms Efficiency Notes & Conditions Min Typ Max Units 100% Load V = 48V 88.5 % IN 80% Load V = 48V 89 % IN % 56% Load V = 48V 89 IN Isolation Characteristics Notes & Conditions Min Typ Max Units Isolation Voltage input - output Basic Isolation 2000 VDC Isolation Capacitance Basic Isolation 2200 pF Isolation Resistance 10 MW 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ045W±48V±1.8V High Efficiency DC-DC Converter Feature Characteristics Notes & Conditions 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 0.8 V Output Voltage Trim Range -10 +10 % Output Voltage Remote Sense +10 % Range Output Over-Voltage Protection 115 119 123 % 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 AQ045W±48V±1.8V High Efficiency DC-DC Converter FIGURE 3: Input Terminal Ripple Current, set-up per FIGURE 2: Input Reflected Ripple Current, set-up per figure figure 1; 10mH source impedance and 47mF 1; 10mH source impedance. Nominal input voltage electrolytic capacitor Nominal input voltage at at full rated load. 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 AQ045W±48V±1.8V High Efficiency DC-DC Converter FIGURE 6: Turn-on transient at full rated FIGURE 7: Turn-on transient at zero load. load. FIGURE 8: Output voltage response to dynamic change in load FIGURE 9: Output voltage response to step-change in current: 75% I to 50%I , where load 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 capacitor and Load cap: 470mF, 30 mW ESR tantalum 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 AQ045W±48V±1.8V High Efficiency DC-DC Converter 95 90 85 80 75 Vin=36V 70 Vin=48V Vin=72V 65 60 10 12 14 16 18 20 22 24 Output current [A] FIGURE 10: Efficiency vs. load current for different input voltages at 25°C 8 7 6 5 36V 4 48V 75V 3 2 1 0 10 12 14 16 18 20 22 24 Output current [A] FIGURE 11: Power dissipation vs. load current for different 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 Efficiency [%] Power Dissipation [W] AQ045W±48V±1.8V High Efficiency DC-DC Converter 25 106 99 20 92 15 85 78 400 LFM 10 71 300 LFM 200 LFM 64 5 100 LFM 57 0 50 0 25 40 55 70 85 Ambient Air T emperature (degC) FIGURE 12: Maximum output current derating curves vs. FIGURE 13: Thermal plot of converter: 25A load, with ambient air temperature. Airflow rates of 100 LFM through 55°C air flowing at the rate of 200 LFM. Air is flowing 400 LFM with air flowing across the converter from pin 1 to across the converter from pin 1 to pin 3 at nominal input pin 3 at nominal input voltage. voltage. 25 119 110 20 101 15 92 83 400 LFM 10 300 LFM 74 200 LFM 5 100 LFM 65 0 LFM 56 0 47 0 25 40 55 70 85 Ambient Air Temperature (degC) FIGURE 14: Maximum output current derating curves vs. FIGURE 15: Thermal plot of converter: 25 A load, with ambient air temperature. Airflow rates of 100 LFM through 55°C air flowing at the rate of 200 LFM. Air is flowing 400 LFM with air flowing across the converter from output across the converter from input to output at nominal input to input at nominal input voltage. 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) AQ045W±48V±1.8V 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 Open Collector Enable Circuit Direct Logic Drive (permanently Enabled) 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 1.8 V æ ö target ç ÷ R = -10.22kW where D = ´100% ç ÷ trim-down ç ÷ D% è ø 1.8 è ø A resistor connected between Trim and + S pins will increase the output voltage. For a desired increase of D% of the nominal output voltage, the value of the resistor should be: 5.11*1.8 (100 + D%) æ ö 511 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 AQ045W±48V±1.8V High Efficiency DC-DC Converter TRIM UP 10000 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). 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. OVERCURRENT 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 increase to 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 AQ045W48V018V25AN Option code Option code Option code -P for Positive Logic, example AQ045W48V018V25AN-P -PL for Cold Plate, example AQ045W48V018V25AN-PL 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com trim Resistance (kOhms)