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IPM24S0A0SR03FA Datasheet(PDF) 6 Page - Delta Electronics, Inc. |
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IPM24S0A0SR03FA Datasheet(HTML) 6 Page - Delta Electronics, Inc. |
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6 / 12 page  DS_IPM24S0C0_01092009 6 TEST CONFIGURATIONS VI(+) VI(-) BATTERY 2 100uF Electrolytic L TO OSCILLOSCOPE Ceramic 3.3uF Note: Input reflected-ripple current is measured with a simulated source inductance. Current is measured at the input of the module. Figure 15: Input reflected-ripple current test setup Vo GND COPPER STRIP 100uFx2 OS-con 1uF ceramic SCOPE Resistive Load Note: Use a 100μFx2 OS-son and 1μF capacitor. Scope measurement should be made using a BNC connector. Figure 16: Peak-peak output noise and startup transient measurement test setup SUPPLY II VI Vo GND Io LOAD CONTACT AND DISTRIBUTION LOSSES CONTACT RESISTANCE Figure 17: Output voltage and efficiency measurement test setup Note: All measurements are taken at the module terminals. When the module is not soldered (via socket), place Kelvin connections at module terminals to avoid measurement errors due to contact resistance. % 100 ) ( × × × = Ii Vi Io Vo η DESIGN CONSIDERATIONS Input Source Impedance To maintain low-noise and ripple at the input voltage, it is critical to use low ESR capacitors at the input to the module. Figure 26 shows the input ripple voltage (mVp-p) for various output models using 2x100uF low ESR electrolytic capacitors (Rubycon P/N:50YXG100, 100uF/50V or equivalent) and 1x3.3.0 uF very low ESR ceramic capacitors (TDK P/N: C4532JB1H335M, 3.3uF/50V or equivalent). The input capacitance should be able to handle an AC ripple current of at least: Arms Vin Vout Vin Vout Iout Irms ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − = 1 Figure 18: Input ripple voltage for various output models, Io = 3A (Cin =2x100uF electrolytic capacitors 1x3.3uF ceramic capacitors at the input) The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the module. An input capacitance must be placed close to the modules input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. |
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