Product # DQ65033QMA06

Phone 1-888-567-9596

Doc.# 005-2DQ653E Rev. H

7/7/04

Page 9

T

pecification

Input:

Input:

Outputs:

Outputs:

Current:

Current:

ackage:

35-75V

35-75V

5.0V & 3.3V

5.0V & 3.3V

60W

60W

Quarter-brick

Quarter-brick

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

3.3V and 5.0V outputs at 50% rated load current. (see Fig. 23)

Figure 26: Output voltage ripple at nominal input voltage and 50%

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

0.0

4.0

8.0

12.0

16.0

20.0

24.0

35 V

48 V

75 V

Serie

s1

Figure 27: Output voltage vs. load current showing typical current limit

curves and converter shutdown points for the 3.3V output. 5.0V load is

at 0A.

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

0.0

4.0

8.0

12.0

16.0

35 V

48 V

75 V

Serie

s1

Figure 28: Output voltage vs. load current showing typical current limit

curves and converter shutdown points for the 5.0V output. 3.3V load is

at 0A.

Figure 29: Load current for 3.3V output (10A/div) as a function of time

when the converter attempts to turn on into a 10 m

Ω

short circuit.

Bottom trace is an expansion of the on-time portion of the top trace.

Figure 30: Load current for 5.0V output (10A/div) as a function of time

when the converter attempts to turn on into a 10 m

Ω

short circuit.

Bottom trace is an expansion of the on-time portion of the top trace.

5.0Vout

3.3Vout