PQ60033HTA50 Datasheet, PDF (7/14 Pages) SynQor Worldwide Headquarters – 50 Amp, No Heatsink, Isolated DC/DC Converter

Performance Curves
Half
Brick
48Vin 3.3Vout 50A
Figure 15
10 µH
source
impedance
Figure 14
Figure 16
i_S
V_SOURCE
i_C
47 µF,
<1Ω ESR
electrolytic
capacitor
DC/DC
Converter
V_OUT
1 µF 15 µF,
ceramic _{450mΩ 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).
Figure 14: Input
rent and nominal
TineprmutinvaolltRagipepwleitChu1r0r_µenHt,siocu, _{ractefuimllpreadteadncoeuatpnudt}
cur-
47µF
electrolytic capacitor (100 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 (20 mV/div). Load capacitance: 1µF ceramic capacitor
and 15µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13)
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
0.0
35 V
48 V
75 V
10.0
20.0
30.0
40.0
50.0
60.0
70.0
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Product # PQ60033HTA50
Phone [phone]
Figure 18: Load current (20A/div) as a function of time when the con-
verter attempts to turn on into a 1 mΩ short circuit. Top trace
(2ms/div) is an expansion of the on-time portion of the bottom trace.
Doc.# 005-2HT633F Rev. A
4/11/03
Page 7