Delta Electronics Series H48SR manual Electrical Characteristics Curves

ELECTRICAL CHARACTERISTICS CURVES

Figure 9: Turn-on transient at zero load current (2 ms/div).

Top Trace: Vout: 1V/div; Bottom Trace: ON/OFF input: 2V/div

Figure 11: Output voltage response to step-change in load

current (75%-50%-75% of Io, max: di/dt = 2.5A/µs). Load

cap: 470µF, 35mΩESR solid electrolytic capacitor and 1µF

ceramic capacitor. Top Trace: Vout (100mV/div), Bottom

Trace: Iout (20A/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 10: Output voltage response to step-change in load current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (20 mV/div), Bottom Trace: Iout (20A/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 12: 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.

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DS_H48SR1R860_06272006