pq30033qga25 SynQor Worldwide Headquarters, pq30033qga25 Datasheet - Page 8

• Manufacturer Part Number: pq30033qga25
• Description: Quarter-brick Dc/dc Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # PQ30033QGA25
T
T
echnical S
echnical S
Figure 17: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 18), Input Reflected Ripple Current
(Figure 19) and Output Voltage Ripple (Figure 20).
Figure 19: Input reflected ripple current, i s , through a 10
inductor at nominal input voltage and rated load current (10 mA/div).
See Figure 17.
Figure 21: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
V
See Fig. 19
SOURCE
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
i
0
S
impedance
10
source
µ
H
18 V
48 V
60 V
5
electrolytic
<1Ω ESR
capacitor
47 µF,
See Fig. 18
pecification
pecification
i
10
C
Load Current
Phone [phone]
Converter
DC/DC
15
(A)
20
capacitor
ceramic
1
µ
F
100mΩ ESR
µ
25
See Fig. 20
H source
capacitor
tantalum
10 µF,
www.synqor.com
V
OUT
30
Figure 18: Input Terminal Ripple Current, i c , at full rated output cur-
rent and nominal input voltage with 10
electrolytic capacitor (200 mA/div). See Figure 17.
Figure 20: Output voltage ripple at nominal input voltage and rated
load current (20 mV/div). Load capacitance: 1
and 10
Figure 22: Load current (20A/div) as a function of time when the con-
verter attempts to turn on into a 10 mΩshort circuit. Top trace
(20ms/div) is an expansion of the on-time portion of the bottom trace.
µ
F tantalum capacitor. Bandwidth: 20 MHz. See Figure 17.
Doc.# 005-2QG33LU Rev. B
P
P
Current:
Current:
ackage:
ackage:
Output:
Output:
Input:
Input:
µ
H source impedance and 47
4/28/05
µ
18-60 V
3.3 V
25 A
Quarter-brick
F ceramic capacitor
18-60 V
3.3 V
25 A
Quarter-brick
µ
Page 8
F