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參數資料

DS_ L48DB12001 _02102009

ELECTRICAL CHARACTERISTICS CURVES

Vo(-)

Vo(+)

10u

CopperStrip

SCOPE

RESISTIV

LOAD

Figure 13:

Output voltage noise and ripple measurement

test setup.

Figure 14:

Output voltage ripple at nominal input voltage

(Vin=48V) and rated load current (Io1=Io2=1.25A,20 mV/div).

Load capacitance: 1F ceramic capacitor and 10F tantalum

capacitor. Bandwidth: 20 MHz. (See Figure 13). Scope

measurement should be made using a BNC cable (length short

than 20 inch). Position the load between 51 mm and 76 mm

(2inches and 3 inches) from the module.

Figure 15:

Output voltage vs. load current (Io1+Io2),

showing typical current limit curves and converter shutdown

points.

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