NQ20X20QGC40 Datasheet, PDF (5/9 Pages) SynQor Worldwide Headquarters – Quarter-brick DC-DC Converter

Technical Specification
100
95
90
85
80
75
70
65
60
0
20Vin 12Vout
12Vin 5Vout
20Vin 5Vout
12Vin 20Vout
5
10
15
20
25
30
35
40
Load Current (A)
Figure 1: Efficiency at different output voltage vs. load current for dif-
ferent input voltage at 25 °C.
45
40
35
30
25
20
15
10
5
0
8
Tb=80 C; Vout=5 V
Tb=100 C; Vout=5 V
Tb=80 C; Vout=12 V
Tb=100 C; Vout=12 V
Tb=80 C; Vout=20 V
Tb=100 C; Vout=20 V
10
12
14
16
18
20
Input Voltage (V)
Figure 3: Maximum output power derating curve with a controlled
baseplate temperature of 80C and 100C.
Input: 10 - 20 V
Outputs: 0 - 20 V
Current: 40 A
Package: Quarter-brick
35
30
25
20
15
10
5
0
0
20Vin 12Vout
12Vin 5Vout
20Vin 5Vout
12Vin 20Vout
5
10
15
20
25
30
35
40
Load Current (A)
Figure 2: Power dissipation at different output voltage vs. load current
for different input voltage at 25 °C.
1 µH _{See Fig. 5}
source
impedance
See Fig. 6
i_S
i_{C Vin}
Dc-dc
Converter
V_out
V_SOURCE
C*
* See values for recommended external input capacitance.
Inductor optional as needed.
100 µF
100mW ESR
tantalum
capacitor
Figure 4: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 5), and Output Voltage Ripple (Figure 6).
20 Vout
12 Vout
5 Vout
20 Vout
12 Vout
5 Vout
Figure 5: Input Terminal Ripple Current at 12 V input and rated load
current (500 mA/div). Load capacitance: 100 µF electrolytic cap.
Bandwidth: 20 MHz. See Figure 4.
Figure 6: Output Voltage Ripple at 12 V input and rated load current
(20 mV/div). Load capacitance: 100 µF electrolytic cap.
Bandwidth: 20 MHz. See Figure 4.
Product # NQ20x20QGC40
Phone [phone]
www.synqor.com
Doc.# 005-NQ2020W Rev. B 03/06/09
Page 5