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PQ40050QGA25NKS Datasheet(PDF) 8 Page - SynQor Worldwide Headquarters |
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PQ40050QGA25NKS Datasheet(HTML) 8 Page - SynQor Worldwide Headquarters |
8 / 14 page Product # PQ40050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG350D Rev. A 11/8/04 Page 8 Input: Input: Output: Output: Current: Current: P Package: ackage: 18-75 V 18-75 V 5.0 V 5.0 V 20 A 20 A Quarter-brick Quarter-brick T Technical S echnical Specification pecification Figure 17: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 18), Input Reflected Ripple Current (Figure 19) and Output Voltage Ripple (Figure 20). 10 µH source impedance DC/DC Converter See Fig. 19 See Fig. 18 See Fig. 20 1 µF ceramic capacitor 10 µF, 100m Ω ESR tantalum capacitor 47 µF, <1Ω ESR electrolytic capacitor VSOURCE i S i C VOUT Figure 18: Input Terminal Ripple Current, ic, at full rated output cur- rent and nominal input voltage with 10µH source impedance and 47µF electrolytic capacitor (200 mA/div). See Figure 17. Figure 19: Input reflected ripple current, is, through a 10 µH source inductor at nominal input voltage and rated load current (20 mA/div). See Figure 17. Figure 20: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 17. 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 5 10 15 20 25 30 Load Current (A) 24 V 48 V 75 V Figure 21: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Figure 22: Load current (20A/div) as a function of time when the con- verter attempts to turn on into a 10 m Ω short circuit. Top trace (10ms/div) is an expansion of the on-time portion of the bottom trace. |
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