APE12M05

APE12M05 Non-isolated Product Te c h n i c a l R e f e r e n c e N o t e s 5V Input, 1.5V Output 18W DC-DC Converter (Rev01) -1TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 Publishing Date: 20020701 APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Introduction APE12M05 is double structure non-isolated DC-DC module featuring high efficiency up to 84%. APE12M05 comes in 5V input version and is capable of providing up to 18W of output power in a small size 2.0in. x 1.0in. x 0.475in. The module uses a 4.5V to 5.5 V input range and provides 1.5V output voltage with 12A output current. APE12M05 features high efficiency, high power density, wide operating environment temperature range, and easy installation. The typical Feature 1. Wide operating environment temperature range ( 0-25 ° C with natural convection ) 2. High efficiency: 84% typical 3. High power density 4. Low output noise 5. Nonisolated output 6. Small size: 50.8mm x 25.4mm x 12.1mm ( 2.0in. x 1.0in. x 0.475in. ) 7. Remote sense 8. Trim function: 90% - 110% Vo efficiency is 84% and the power density is 18.9W/inch3. The operating environment temperature is 25 ° C with natural convection. With adjustable output, remote sense, OCP, the product is especially suitable for Telecom, Datacom, work station, severs and distributed power supply systems. The APE12M05 is designed to meet CISPR22, FCC Class A, UL, TUV, and CSA certifications. 2. Servers 3. Workstations 4. Desktop computers 1. Distributed power architecture 9. Over-current protection Applications TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -2www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Typical Application Vin C1 C2 Vin Vout C3 C4 Load GND C1 C2 C3 C4 : Recommended 1200µF Electrolytic Capacitor : Recommended 4.7µF Ceramic Capacitor : Recommended 4.7µF Ceramic Capacitor : Recommended 1200µF Electrolytic Capacitor Block Diagram Block +Vin Current Detecting +Vout GND OCP Driving GND Sense + Vref PWM Trim Pin Location (Component-side view) -Vin -Vsense Ground No conn. No conn. Trim +Vsense +Vin -Vout +Vout TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -3www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Absolute Maximum Rating Characteristic Input Voltage(continuous) Input Voltage(peak/surge) Operating temperature storage temperature 0 -40 Min Typ Max 6 7 25 125 Units Vdc Vdc °C °C 100ms non-repetitive Natural convection Notes Input Characteristics Characteristic Input Voltage Range Input Reflected Current (p-p) Shortcircuit Current Input Current Min 4.5 Typ 5 4 1.5 4.2 Max 5.5 10 2 Units Vdc %Iin A A Actual testing value < 4.6A Notes APE12M05 Output Characteristics Characteristic Min Power Output Current Line Regulation Load Regulation Efficiency Dynamic Response 50%-100% load 100%-50% load 83 Typ 18 Max W 12 1 1 Units Notes A %Vo %Vo % Vin=4.5~5.5V, Io=12A Io=0~12A, Vin=5V 84 30 120 30 120 50 300 50 300 mV µs mV µs Ta=25 C, DI/Dt=1A/10µs ° Ta=25 C, DI/Dt=1A/10µs ° Ta=25 C, DI/Dt=1A/10µs ° Ta=25 C, DI/Dt=1A/10µs ° TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -4www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output APE12M05 Output Characteristics ( continued ) Characteristic Current Limit Threshold Output Setpoint Voltage Trim Range Sense Compensation Temperature Coefficient Ripple (rms) Noise (p-p) Switching Frequency 9 30 290 Min 13.2 -1 -10 0.25 0.03 18 50 0 Typ Max 16.8 +1 +10 Units A %Vo %Vo V %Vo/°C mV mV kHz ( 0 to 20MHz BW ) ( 0 to 20MHz BW ) Vin=5V, Io=12A Notes General Specifications Characteristic MTBF Pin solder temperature Hand Soldering Time Weight Min Typ 1,800 Max Units k Hrs Notes Bellcore TR332, 25 C ° wave solder < 10 s iron temperature 425 C ° 260 5 27 °C s grams Ordering Information Model Number APE12M05 Input Voltage 5V Iin ( typ ) 4.2A Output Voltage 1.5V Output Current 12A Efficiency typ 84 Ripple (mV rms) 9 Noise (mV pp) 30 TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -5www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Ef ficiency Characteristic Curves Typical Efficiency APE12M05 4.5V 90 88 1.4 86 84 5.5V 5V 1.6 (at 25°C) ( at Typical Output Characteristics APE12M05 5.5V Output Voltage(V) 5V 1.2 Efficency(%) 82 80 78 76 1.0 4.5V 0.8 0.6 74 0 2 4 6 8 10 12 12 13 14 15 16 17 Output Current,Io(A) Output Current(A) Typical Output Ripple Voltage ( 12A Output ) APE12M05 Typical Start-Up Transient(5V Input,12A Output) APE12M05 TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -6www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Power Derating Power Derating vs. Local Ambient Temperature and Air Velocity APE12M05 100 Percent of Maximum Output Power 80 60 40 Natural Convection 20 0 0 10 20 30 40 50 60 70 80 90 100 110 120 Ambient Temperature T A (° C) TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -7www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Input Characteristics The APE12M05 power module has no internal fuse. An external fuse must always be employed! To meet international safety requirements, an input line fuse should be used. Input wires and copper coil must be capable of conducting a current of 1.5 times the value of the fuse. If one of the input lines is connected to chassis ground, then the fuse must be placed in the other input line. A fuse with ratings of 10A is recommended for APE12M05. Output T rimming Output can be externally trimmed by using either method shown in figure 2. Users can increase or decrease the output voltage set point of a module by connecting an external resistor between the TRIM pin and either the +Vout or GND pins. The trim resistor should be positioned close to the module. If not using the trim feature, leave the TRIM pin open. Trimming up or down by more than 10% of the nominal output may cause the converter to work improperly. J1 PIN 3 Output Characteristics J2 PIN 9 Trim up Remote Sensing When the load can not be placed close to converter output pin, voltage drop will occur in distribution. This voltage drop can be compensated using sense lead. As shown in figure 1, connecting sense pin close to the load, when the load changes, the module will automatically adjust the real output to maintain the constant voltage on the load. If not using the remote sense pin, leave it open. Rline +Vout +Sense -Sense Rline -Vout Trim down J1 PIN 4 Rtrim up = 10 Vo up - 1.5 - 20 Rtrim down = 20 Vo down - 1 3 - 2 Vo down - 20 Where: Rtrim up is trimming up resistance; Rtrim down is trimming down resistance; Vo up is trim up voltage; Vo down is trim down voltage; R is in kohms. Fig.2 Output Voltage Set-point Adjustment Load Fig.1 Sense Connection Output Over-Current Protection O utput APE12M05 features current limiting with a threshold is between 13.2A and 16.8A. The module can not tolerate short circuit conditions in a long time. When the overcurrent condition is removed, the converter will automatically restart. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -8www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Safety Considerations For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL1950, CSA C22.2 No. 950-95, and VDE 0805 (EN60950, IEC950). For the module's output to be considered meeting the requirements of safety extra-low voltage (SELV), one of the following must be true: 1. All inputs are SELV and floating, with the output also floating. 2. All inputs are SELV and grounded, with the output also grounded. 3. Any non-SELV input must be provided with reinforced from any other hazardous voltages, including the ac mains, and must have a SELV reliability test performed on it in combination with the converters. Inputs must meet SELV requirements. If the input meets extra-low voltage (ELV) requirements, then the converter's output is considered ELV. The input to these units is to be provided with a maximum 10A normal blow fuse in the ungrounded lead. parallel with the air-flow direction. Soldering APE12M05 is compatible with standard wave soldering techniques. When wave soldering, the converter pins should be preheated for 2030 seconds at 110 ° C, and wave soldered at 260 ° C for less than 10 seconds. When hand soldering, the iron temperature should be maintained at 425 ° Cand applied to the converter pins for less than 5 seconds. Longer exposure can cause internal damage to the converter. Cleaning can be performed with cleaning solvent IPA or with water. Mechanical Chart See Fig. 3. next page. Dimensions are in millimeters Component-side footprint. (inches). APE12M05 Mechanical Considerations Thermal Performance APE12M05 can work properly under natural convection in ambient temperature up to 25° C. If air-flow is applied, it can work in a much wider temperature range( See derating curves for reference ). In order to maintain efficient heat dissipation, the converters should be mounted TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -9www.astec.com APE12M05 Non-Isolated DC/DC Converter 5V Input, 1.5V Output Tolerances: Inches .xx !0.020 .xxx !0.010 Pins >4mm