Product # PQ60010QPA60

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2QP610F Rev. D

9/21/07

Page 7

T

pecification

Input:

Input:

Output:

Output:

Current:

Current:

ackage:

35-75 V

35-75 V

1.0 V

1.0 V

60 A

60 A

Quarter-brick

Quarter-brick

Figure 13: Test set-up diagram showing measurement points for Input

Terminal Ripple Current (Figure 14), Input Reflected Ripple Current

(Figure 15) and Output Voltage Ripple (Figure 16).

Figure 14: Input Terminal Ripple Current, ic, at full rated output cur-

electrolytic capacitor (100 mA/div). See Figure 13.

source

impedance

DC/DC

Converter

See Fig. 15

See Fig. 14

See Fig. 16

ceramic

capacitor

10 µF,

100mW ESR

tantalum

capacitor

47 µF,

@1W ESR

electrolytic

capacitor

i

S

i

C

inductor at nominal input voltage and rated load current (10 mA/div).

See Figure 13.

Figure 16: Output voltage ripple at nominal input voltage and rated

0.0

0.2

0.4

0.6

0.8

1.0

1.2

010

20

30

40

50

60

70

80

35 V

48 V

75 V

Figure 17: Output voltage vs. load current showing typical current limit

curves and converter shutdown points.

Figure 18: Load current (50A/div) as a function of time when the con-

verter attempts to turn on into a 1 m

W short circuit. Top trace

(1.0ms/div) is an expansion of the on-time portion of the bottom trace.