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APTH012A0X3-SRZ Datasheet(PDF) 11 Page - Lineage Power Corporation |
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APTH012A0X3-SRZ Datasheet(HTML) 11 Page - Lineage Power Corporation |
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11 / 23 page  Data Sheet May 20, 2009 Micro TLynxTM: Non-isolated DC-DC Power Modules: 2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 12A output current LINEAGE POWER 11 Test Configurations TO OSCILLOSCOPE CURRENT PROBE LTEST 1μH CS 1000μF Electrolytic E.S.R.<0.1 Ω @ 20°C 100kHz 2x100μF Tantalum VIN(+) COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. CIN Figure 31. Input Reflected Ripple Current Test Setup. NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Vo+ COM 0.1uF RESISTIVE LOAD SCOPE USING BNC SOCKET COPPER STRIP GROUND PLANE 10uF Figure 32. Output Ripple and Noise Test Setup. VO COM VIN(+) COM RLOAD Rcontact Rdistribution Rcontact Rdistribution Rcontact Rcontact Rdistribution Rdistribution VIN VO NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Figure 33. Output Voltage and Efficiency Test Setup. η = VO. IO VIN. IIN x 100 % Efficiency Design Considerations Input Filtering The Micro TLynx TM module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, low-ESR ceramic capacitors are recommended at the input of the module. Figure 34 shows the input ripple voltage for various output voltages at 3A of load current with 1x47 µF or 2x47 µF ceramic capacitors and an input of 5V. Figure 35 shows data for the 3.3Vin case, with 1x47µF or 2x37µF of ceramic capacitors at the input. 0 20 40 60 80 100 120 140 0.5 1 1.5 2 2.5 3 3.5 1x47uF 2x47uF Figure 34. Input ripple voltage for various output voltages with 1x47 µF or 2x47 µF ceramic capacitors at the input (12A load). Input voltage is 5V. 0 20 40 60 80 100 120 0.5 1 1.5 2 2.5 3 1x47uF 2x47uF Figure 35. Input ripple voltage in mV, p-p for various output voltages with 1x47 µF or 2x47 µF ceramic capacitors at the input (12A load). Input voltage is 3.3V. |
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