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Q48DR3R350NRFA Datasheet(PDF) 6 Page - Delta Electronics, Inc. |
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Q48DR3R350NRFA Datasheet(HTML) 6 Page - Delta Electronics, Inc. |
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6 / 14 page  DS_Q48DR1R533_03152007 7 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at Iout1=7.5A. Load cap: 470µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 14: Output voltage response to step-change in load current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at Iout2=7.5A. Load cap: 470µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 15: Output voltage response to step-change in load current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap: 470µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. Figure 16: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 µH. Capacitor Cs offset possible battery impedance. Measure current as shown above Ch4 Ch3 Ch2 Ch1 Ch4 Ch3 Ch2 Ch1 Ch4 Ch3 Ch2 Ch1 |
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