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DNM04S0A0S10NFD Datasheet(PDF) 8 Page - Delta Electronics, Inc. |
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DNM04S0A0S10NFD Datasheet(HTML) 8 Page - Delta Electronics, Inc. |
8 / 16 page DS_DNM04SIP10_07182012D 8 TEST CONFIGURATIONS VI(+) VI(-) BATTERY 2 100uF Tantalum L Note: Input reflected-ripple current is measured with a simulated source inductance. Current is measured at the input of the module. Figure 29: Input reflected-ripple test setup Vo GND 10uF tantalum 1uF ceramic SCOPE Resistive Load Note: Use a 10μF tantalum and 1μF capacitor. Scope measurement should be made using a BNC cable. Figure 30: Peak-peak output noise and startup transient measurement test setup. VI Vo GND Vo Vin Figure 31: 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 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 32 shows the input ripple voltage (mVp-p) for various output models using 200 µF(2 x100uF) low ESR tantalum capacitor (KEMET p/n: T491D107M016AS, AVX p/n: TAJD107M106R, or equivalent) in parallel with 47 µF ceramic capacitor (TDK p/n:C5750X7R1C476M or equivalent). Figure 33 shows much lower input voltage ripple when input capacitance is increased to 400 µF (4 x 100 µF) tantalum capacitors in parallel with 94 µF (2 x 47 µF) ceramic capacitor. The input capacitance should be able to handle an AC ripple current of at least: Arms Vin Vout Vin Vout Iout Irms 1 0 50 100 150 200 250 300 350 0 1 2 3 4 Output Voltage (Vdc) 5.0Vin 3.3Vin Figure 32: Input voltage ripple for various output models, IO = 10 A (CIN = 2 ×100 µF tantalum // 47 µF ceramic) 0 50 100 150 200 0 1 2 3 4 Output Voltage (Vdc) 5.0Vin 3.3Vin Figure 33: Input voltage ripple for various output models, IO = 10 A (CIN = 4 ×100 µF tantalum // 2×47 µF ceramic) |
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