PQ60120HPA20 Datasheet, PDF (7/13 Pages) SynQor Worldwide Headquarters – Half-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 12 V
Current: 20 A
Package: Half-brick
See Fig. 15
10 µH
source
impedance
See Fig. 14
See Fig. 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 (200 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)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
35 V
48 V
75 V
246
8 10 12 14 16 18 20 22 24 26 28
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Figure 18: Load current (10A/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.
Product # PQ60120HPA20
Phone [phone]
www.synqor.com
Doc.# 005-2HP612K Rev. E
3/08/05
Page 7