Input:

Input:

Output:

Output:

Current:

Current:

ackage:

35-75 V

35-75 V

12 V

12 V

4 A

4 A

Eighth-brick

Eighth-brick

T

pecification

Product # PQ60120EML04

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2EM612E Rev. C

04/25/06

Page 7

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

electrolytic capacitor (200 mA/div). See Figure 13.

inductor at nominal input voltage and rated load current (5 mA/div).

See Figure 13.

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

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).

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

01

234

56

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 (5A/div) as a function of time when the con-

verter attempts to turn on into a 10 m

Ω

short circuit. Top trace

(2.0ms/div) is an expansion of the on-time portion of the bottom trace.

source

impedance

DC/DC

Converter

See Fig. 15

See Fig. 14

See Fig. 16

ceramic

capacitor

10 µF,

100m

Ω ESR

tantalum

capacitor

47 µF,

<1

Ω ESR

electrolytic

capacitor

i

S

i

C