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PDF PQ48033QGA25 Data sheet ( Hoja de datos )
| Número de pieza | PQ48033QGA25 | |
| Descripción | Converter | |
| Fabricantes | Synqor | |
| Logotipo |  |
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Technical
Specification
PQ48033QGA25
48Vin 3.3Vout 25Amp 2000Vdc
Input
Output
Current
Isolation
Quarter-brick
DC/DC Converter
The PQ48033QGA25 PowerQor™ Giga quarter-brick con-
verter is a next-generation, board-mountable, isolated, fixed
www.DataSheeswt4Uitc.choinmg frequency DC/DC converter that uses synchronous
rectification to achieve extremely high conversion efficiency.
The power dissipated by the converter is so low that a
heatsink is not required, which saves cost, weight, height,
and application effort. All of the power and control compo-
nents are mounted to the multi-layer PCB substrate with high-
yield surface mount technology. Since the PowerQor con-
verter has no explicit thermal interfaces, it is extremely reli-
able. RoHS 5/6 compliant (see page 12).
Operational Features
• Ultra-high efficiency, >88% at full rated load current
• Delivers up to 25 amps of output current with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V meets or
exceeds all 48V bus standards
• Fixed frequency switching provides predictable EMI per-
formance
• No minimum load requirement means no preload resis-
tors required
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height less than 0.40” (10.2mm), permits better
airflow and smaller card pitch
• Total weight: 1.2 oz. (34 grams)
• Flanged pins designed to permit surface mount solder-
ing (avoid wave solder) using FPiP technique
Control Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim permits custom voltages and volt-
age margining
PQ48033QGA25 Module
Protection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter and load from permanent damage and conse-
quent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from dam-
aging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Safety Features
• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flamma-
bility requirements
Product # PQ48033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG433D Rev. E 09/08/05
Page 1
1 page  
Technical Specification
Input: 35-75 V
Output: 3.3 V
Current: 25 A
Package: Quarter-brick
95
90
85
80
75
www.DataSheet740U.com
36 Vin
65 48 Vin
75 Vin
60
0 3 5 8 10 13 15 18 20 23 25
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for min-
imum, nominal, and maximum input voltage at 25°C.
14
12
10
8
6
4
36 Vin
2 48 Vin
75 Vin
0
0 3 5 8 10 13 15 18 20 23 25
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
90
89
88
87
86
85
84
83
82
0
25 C
40 C
55 C
100 200 300 400 500
Air Flow (LFM)
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C
(nominal input voltage).
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
0
25 C
40 C
55 C
100 200 300 400 500
Air Flow (LFM)
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
25
20
15
10
5
0
0
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 40 55
Ambient Air Temperature (oC)
70
85
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
across the converter from pin 1 to pin 3 (nominal input voltage).
Figure 6: Thermal plot of converter at 23 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
sideways from pin 1 to pin 3 (nominal input voltage).
Product # PQ48033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG433D Rev. E 09/08/05
Page 5
5 Page 
Technical Specification
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
www.DataSSyhseteemt4U.Icnosmtability” is available on the SynQor web site
(www.synqor.com) which provides an understanding of why
this instability arises, and shows the preferred solution for cor-
recting it.
Application Circuits: Figure D below provides a typical cir-
cuit diagram which details the input filtering and voltage trim-
ming.
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external elec-
trolytic input capacitor. The recommended external input capac-
itance is specified in the “Input Characteristics” section. More
detailed information is available in the application note titled
“EMI Characteristics” on the SynQor website.
Input: 35-75 V
Output: 3.3 V
Current: 25 A
Package: Quarter-brick
Vin(+)
Vout(+)
Electrolytic
Vsense(+)
Vin
External
Input
Capacitor
47µF
ON/OFF
Rtrim-up
Trim or
Filter
Vsense(_)
Rtrim-down Cload
Iload
Vin(_)
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Vin(+)
L
C
Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on the specifications page).
Product # PQ48033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG433D Rev. E 09/08/05
Page 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet PQ48033QGA25.PDF ] | |
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