Input:

Input:

Output:

Output:

Current:

Current:

ackage:

18-75 V

18-75 V

15.0 V

15.0 V

6.67 A

6.67 A

Quarter-brick

Quarter-brick

T

pecification

Product # PQ40150QGA07

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2QG157D Rev. A

5/31/07

Page 7

Figure 13: Turn-on transient at full load (resistive load) (4 ms/div).

Input voltage pre-applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input

(5V/div).

Figure 14: Turn-on transient at zero load (4 ms/div). Ch 1: Vout

(5V/div). Ch 2: ON/OFF input (5V/div).

75%-50% of Iout(max); dI/dt = 0.1A/µ s). Load cap: 10µ F, 100 m

W ESR tanta-

lum cap and 1µ F ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (2A/div).

75%-50% of Iout(max): dI/dt = 5A/µ s). Load cap: 470µ F, 30 m

W ESR tanta-

lum cap and 1µ F ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (2A/div).

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).

source

impedance

DC/DC

Converter

See Fig. 19

See Fig. 18

See Fig. 20

ceramic

capacitor

10 µF,

100mW ESR

tantalum

capacitor

47 µF,

<1W ESR

electrolytic

capacitor

i

S

i

C

Figure 18: Input Terminal Ripple Current, ic, at full rated output cur-

electrolytic capacitor (200 mA/div). See Figure 17.