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PQ60033HPA70PKF Datasheet(PDF) 7 Page - SynQor Worldwide Headquarters

Part # PQ60033HPA70PKF
Description  Half-brick DC/DC Converter
Download  13 Pages
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Manufacturer  SYNQOR [SynQor Worldwide Headquarters]
Direct Link  http://www.synqor.com
Logo SYNQOR - SynQor Worldwide Headquarters

PQ60033HPA70PKF Datasheet(HTML) 7 Page - SynQor Worldwide Headquarters

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Product # PQ60033HPA70
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP633K Rev. A
12/20/04
Page 7
Input:
Input:
Output:
Output:
Current:
Current:
P
Package:
ackage:
35-75 V
35-75 V
3.3 V
3.3 V
70 A
70 A
Half-brick
Half-brick
T
Technical S
echnical Specification
pecification
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).
10 µH
source
impedance
DC/DC
Converter
See Fig. 15
See Fig. 14
See Fig. 16
1 µF
ceramic
capacitor
15 µF,
450m
Ω ESR
tantalum
capacitor
47 µF,
<1
Ω ESR
electrolytic
capacitor
VSOURCE
i
S
i
C
VOUT
Figure 14: Input Terminal Ripple Current, ic, at full rated output cur-
rent 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 (10 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 15µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
1020304050
60708090
100
Load Current (A)
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 (20A/div) as a function of time when the con-
verter attempts to turn on into a 1 m
Ω short circuit. Top trace
(2ms/div) is an expansion of the on-time portion of the bottom trace.


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