PQ60120QEX25 Datasheet, PDF (7/13 Pages) SynQor Worldwide Headquarters – Quarter-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 12 V
Current: 25 A (300W)
Package: Quarter-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div).
Ch 1: Vout (5V/div)
Ch 2: ON/OFF input (5V/div)
Figure 8: Turn-on transient at zero load (10 ms/div).
Ch 1: Vout (5V/div)
Ch 2: ON/OFF input (5V/div)
Figure 9: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 1uF ceramic and 10uF tanta-
lum capacitors. Top trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
Figure 10: Output voltage response to step-change in load current (50%-
75%-50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 15 mW ESR
tantalum capacitor. Top trace: Vout (500mV/div), Bottom trace: Iout (10A/
Figure 13
4.7 µH
source
impedance
Figure 12
Figure 14
i_S
V_SOURCE
i_C
100 µF,
0.2W ESR
electrolytic
capacitor
DC/DC
Converter
V_OUT
1 µF 10 µF,
ceramic _{100mW ESR}
capacitor _tantalum
capacitor
Figure 11: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 12), Input Reflected Ripple Current
(Figure 13) and Output Voltage Ripple (Figure 14).
Figure 12: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 4.7µH source impedance and
100µF electrolytic capacitor (100 mA/div). See Figure 11.
Product # PQ60120QEA25
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Doc.# 005-2QE612J Rev. B
03/24/09
Page 7