SQ24 datasheet(21/51 Pages) BEL

21 / 51 page

SQ24 Series

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BCD.00706_AB

Fig. 5.0V.13: Output voltage ripple (20 mV/div.) at full rated load

current into a resistive load with Co = 10

F tantalum + 1uF

ceramic and Vin = 24 V. Time scale: 1

s/div.

Vout

Vsource

F

ceramic

capacitor

H

source

inductance

Semi

QTM Family

DC/DC

Converter

F

ESR <1

electrolytic

capacitor



Fig. 5.0V.14: Test setup for measuring input reflected ripple

currents, ic and is.

Fig. 5.0V.15: Input reflected ripple current, ic (100 mA/div.),

measured at input terminals at full rated load current and Vin =

24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1

s/div.

Fig. 5.0V.16: Input reflected ripple current, is (10 mA/div.),

measured through 10

H at the source at full rated load current

and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale:

s/div.

Fig. 5.0V.17: Output voltage vs. load current showing current limit

point and converter shutdown point. Input voltage has almost no

effect on current limit characteristic.

Fig. 5.0V.18: Load current (top trace, 10 A/div., 20 ms/div.) into a

10 m

 short circuit during restart, at Vin = 24V. Bottom trace (10

A/div., 1 ms/div.) is an expansion of the on-time portion of the top

trace.

6.0

Iout [Adc]

5.0

2.0

1.0

4.0

3.0

SQ24T/S08060 (5.0 VOUT)

SQ24 Datasheet(PDF) 21 Page - Bel Fuse Inc.

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