Input:

Input:

Output:

Output:

Current:

Current:

ackage:

35-75 V

35-75 V

12 V

12 V

50 A

(600W)

Half-brick

Half-brick

T

pecification

Product # PQ60120HZA50

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2HZ612J Rev. A

8/20/07

Page 8

Figure 13: Input reflected ripple current, is, through a 4.7 µ H source

inductor, using a 220 µ F input capacitor, at nominal input voltage and

rated load current (10 mA/div; 2 µ s/div). See Figure 11.

Figure 14: Output voltage ripple at nominal input voltage and rated load

current (50 mV/div; 2 µ s/div). Load capacitance: 1 µ F ceramic capacitor

and 15 µ F tantalum capacitor. Bandwidth: 20 MHz. See Figure 11.

Figure 15: Output voltage response to step-change in input voltage (35 V to 75

V in 300 µ s; 1 ms/div). Load cap: 470 µ F, 15 m

W ESR electrolitic capacitor. Top

trace: Vout (500 mV/div). Bottom trace: Vin (10 V/div), at zero load current.

Figure 16: Load current (10 A/div; 10 ms/div) as a function of time

when the converter attempts to turn on into a 1 m

W short circuit.

0

2

4

6

8

10

12

14

16

-25

-15

-5

5

15

25

35

45

55

65

Load Current (A)

36Vin

48Vin

75Vin

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

curves and OVP shutdown point.