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PQ48018HGA40PKS Datasheet(PDF) 7 Page - SynQor Worldwide Headquarters |
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PQ48018HGA40PKS Datasheet(HTML) 7 Page - SynQor Worldwide Headquarters |
7 / 14 page Product # PQ48018HGA40 Phone 1-888-567-9596 Doc.# 005-2HG418C Rev. C 12/17/02 Page 7 Half Half Brick Brick Performance Curves 48Vin 1.8Vout 40A Figure 13: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 14), Input Reflected Ripple Current (Figure 15) and Output Voltage Ripple (Figure 16). Figure 14: Input Terminal Ripple Current, ic, at full rated output cur- rent and nominal input voltage with 10µH source impedance and 47µF electrolytic capacitor (100 mA/div). (See Figure 13) Figure 15: Input reflected ripple current, is, through a 10 µH source inductor at nominal input voltage and rated load current (5 mA/div). (See Figure 13) Figure 16: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 15µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 4 8 12 16 20 24 28 32 36 40 44 48 52 Load Current (A) 36 V 48 V 75 V Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Figure 18: Load current (20A/div) as a function of time when the con- verter attempts to turn on into a 1 m Ωshort circuit. Top trace (2ms/div) is an expansion of the on-time portion of the bottom trace. 10 µH source impedance DC/DC Converter Figure 15 Figure 14 Figure 16 1 µF ceramic capacitor 15 µF, 450m Ω ESR tantalum capacitor 47 µF, <1 Ω ESR electrolytic capacitor VSOURCE i S i C VOUT |
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