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APTS030A0X Datasheet(PDF) 10 Page - Lineage Power Corporation |
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APTS030A0X Datasheet(HTML) 10 Page - Lineage Power Corporation |
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10 / 23 page  Data Sheet November 11, 2010 12V Mega TLynxTM: Non-Isolated DC-DC Power Modules: 6.0 – 14Vdc Input; 0.8Vdc to 3.63Vdc Output; 30A output current LINEAGE POWER 10 Test Configurations TO OSCILLOSCOPE CURRENT PROBE LTEST 1μH CS 220μF E.S.R.<0.1 Ω @ 20°C 100kHz Min 150μF 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 25. 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 1uF . RESISTIVE LOAD SCOPE COPPER STRIP GROUND PLANE 10uF Figure 26. 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 27. Output Voltage and Efficiency Test Setup. η = VO. IO VIN. IIN x 100 % Efficiency Design Considerations The 12V Mega TLynx TM module should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitor 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 28 shows the input ripple voltage for various output voltages at 30A of load current with 1x22 µF, 2x22 µF or 2x47 µF ceramic capacitors and an input of 12V. 0 50 100 150 200 250 300 350 400 0.5 1 1.5 2 2.5 3 1x22uF 2x22uF 2x47uF Output Voltage (Vdc) Figure 28. Input ripple voltage for various output voltages with 1x22 µF, 2x22 µF or 2x47 µF ceramic capacitors at the input (30A load). Input voltage is 12V. Output Filtering The 12V Mega TLynx modules are designed for low output ripple voltage and will meet the maximum output ripple specification with no external capacitors. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR ceramic and polymer are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable Loop feature described later in this data sheet. |
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