bq50120qta20pysbq55090qta27pyc SynQor Worldwide Headquarters, bq50120qta20pysbq55090qta27pyc Datasheet - Page 6

• Manufacturer Part Number: bq50120qta20pysbq55090qta27pyc
• Description: Quarter-brick Dc Busconverter
• Manufacturer: SynQor Worldwide Headquarters

Product # BQ50120QTA20
T
T
echnical S
echnical S
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (2 ms/div).
Ch 1: Vout (5V/div); Ch 2: ON/OFF Pin (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).
20
18
16
14
12
10
8
6
4
2
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)
0 LFM (0 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 20 amp load current (240W)
with 55
converter from input to output (nominal input voltage).
Figure 10: Turn-on transient at zero load (2 ms/div).
Ch 1: Vout (5V/div); Ch 2: ON/OFF Pin (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.# 005-2BQ512J Rev. E
10
:
source
Test set-up diagram showing measurement points for Input
µ
H
<1Ω ESR
electrolytic
capacitor
47 µF,
See Fig. 13
P
i
P
Semiconductor junction temperature is
C
Current:
Current:
ackage:
within 1°C of surface temperature
ackage:
Output:
Output:
Input:
Input:
Converter
DC/DC
03/17/06
42-53 V
12 V
20 A
Quarter-brick
42-53 V
12 V
20 A
Quarter-brick
capacitor
ceramic
1
µ
F
450mΩ ESR
See Fig. 15
capacitor
tantalum
15 µF,
V
Page 6
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