Input:

35-75V

Output:

12V

Current:

33A

Package:

Quarter-brick

Product # PQ60120QZB33

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005586 Rev. G

02/04/15

Page 7

Input:

35-75V

Output:

12V

Current:

33A

Package:

Quarter-brick

Technical Figures

source

impedance

DC-DC

Converter

Input

Terminal

Ripple

Current

Input

Reflected

Ripple

Current

Output

Voltage

Ripple

ceramic

capacitor capacitor

electrolytic

electrolytic

capacitor

i

S

i

C

Figure 7: Output Voltage Response to Step-Change in Load Current (50%-

75%-50% of Iout(max): dI/dt = 5 A/μ s; 1 ms/div). Load cap: 470 μF electrolitic

capacitor. Top trace: Vout (500 mV/div). Bottom trace: Iout (35 A/div).

Figure 8: Test Set-up Diagram showing measurement points for Input Terminal

Ripple Current (Fig 9), Input Reflected Ripple Current (Fig 10) and Output

Voltage Ripple (Fig 11).

Figure 9: Input Terminal Ripple Current, ic, at full rated output current and

nominal input voltage with 4.7μH source impedance and 100μF electrolytic

capacitor (50mA/div; 2μs/div). See Figure 8.

Figure 10: Input Reflected Ripple Current, is, through a 4.7μH source inductor,

using a 220μF input capacitor, at nominal input voltage and rated load current

(20mA/div; 2μs/div). See Figure 8.

Figure 11: Output Ripple voltage at nominal input voltage and rated load

current (20mV/div; 4 μs/div). Load capacitance: 1μF ceramic capacitor and

10μF tantalum capacitor. Bandwidth: 20MHz. See Figure 8.

Figure 12: Output Short Load Current (10A/div) as a function of time when the

converter attempts to turn on into a 1mW short circuit. Top trace at 200ms/div.

Bottom trace at 20ms/div