bq50120qta20pys SynQor Worldwide Headquarters, bq50120qta20pys Datasheet - Page 6

• Manufacturer Part Number: bq50120qta20pys
• Description: Quarter-brick Dc Bus Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # BQ50120QTA25
T
T
echnical S
echnical S
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 50 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (100 µs/div).
Ch 1: Vout (5V/div)
Figure 11
50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF, 100 m
and 1µF ceramic cap. Top trace: Vout (200mV/div), Bottom trace: Iout (5A/div).
25
20
15
10
5
0
0
: Output voltage response to step-change in load current (50%-75%-
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
25
pecification
pecification
Ambient Air Temperature (
40
Phone [phone]
55
o
C)
Ω
ESR tantalum cap
70
www.synqor.com
85
Figure 8: Thermal plot of converter at 25 amp load current (300W)
with 55
converter from input to output (nominal input voltage).
Figure 10: Turn-on transient at zero load (100 µs/div). Ch 1: Vout
(5V/div)
Figure 12
Terminal Ripple Current (Figure 13), Input Reflected Ripple Current
(Figure 14) and Output Voltage Ripple (Figure 15).
V
See Fig. 14
SOURCE
°
i
C air flowing at the rate of 200 LFM. Air is flowing across the
S
impedance
Doc.# 005-2BQ512M Rev. C
10
:
source
Test set-up diagram showing measurement points for Input
µ
H
electrolytic
<1Ω ESR
capacitor
47 µF,
See Fig. 13
i
P
Semiconductor junction temperature is
P
C
Current:
within 1°C of surface temperature
Current:
ackage:
ackage:
Output:
Output:
Input:
Input:
Converter
DC/DC
03/17/06
42-53 V
12 V
25 A
Quarter-brick
42-53 V
12 V
25 A
Quarter-brick
capacitor
ceramic
1
µ
F
450mΩ ESR
See Fig. 15
capacitor
tantalum
15 µF,
V
Page 6
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