PQ60033EGX20 Datasheet, PDF (7/13 Pages) SynQor Worldwide Headquarters – Fixed frequency switching provides predictable EMI performance

Technical Specification
See Fig. 15
10 µH
source
impedance
See Fig. 14
See Fig. 16
i_S
i_C
DC/DC
Converter
V_OUT
V_SOURCE
47 µF,
<1W ESR
electrolytic
capacitor
1 µF
10 µF,
ceramic 100mW ESR
capacitor _tantalum
capacitor
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).
Input: 35-75 V
Output: 3.3 V
Current: 20 A
Package: Eighth-brick
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 10µH source impedance and 47µF electrolytic
capacitor (200 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 µH source 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 load current
(50 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. See Figure 13.
4.0
3.5
3.0
2.5
2.0
35 V
1.5
48 V
75 V
1.0
0
5
10
15
20
25
30
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and converter shutdown points.
Figure 18: Load current (20A/div) as a function of time when the converter
attempts to turn on into a 10 mΩ short circuit. Top trace (2.0ms/div) is an
expansion of the on-time portion of the bottom trace.
Product # PQ60033EGx20
Phone [phone]
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 7