PQ60025QTA40 Datasheet, PDF (7/13 Pages) SynQor Worldwide Headquarters – 40 Amp, No Heatsink, Isolated DC/DC Converter

Performance Curves
Quarter
Brick
48Vin 2.5Vout 40A
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 10 µF,
ceramic _{100mΩ 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 Terminal Ripple Current, ic, at full rated output cur-
rent and nominal input voltage with 10µH source impedance and 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 (10 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 10µF tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
Figure 17: Output voltage response to step-change in input voltage
(50V to 100V in 40µs). Load cap: 10µF, 100 mΩ ESR tantalum capaci-
tor and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Vin (20V/div).
Product # PQ60025QTA40
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. Bottom trace
(2ms/div) is an expansion of the on-time portion of the top trace.
Doc.# 005-2QT625C Rev. B
3/6/03
Page 7