QTS48T25120-PDBS2
| Model | QTS48T25120-PDBS2 |
| Description | DC-DC Unregulated Power Supply Module, 1 Output, 300W, Hybrid |
| PDF file | Total 8 pages (File size: 151K) |
| Chip Manufacturer | BEL |
QTS48T25120 DC-DC Series Data Sheet
300-Watt Quarter-Brick Bus Converter
Features
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RoHS lead-free and lead-solder-exempt
products are available
Cost-effective, single board design
Ultra-high efficiency 96.2% @ full load
Low profile – 0.400” (10.16 mm)
Narrow Input Range 42 – 53 VDC
Paralleling option
Input-to-output isolation: 2000 VDC
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Input undervoltage lockout
Input overvoltage shutdown
Overtemperature protection
Approved to UL 60950/ CAN/CSA-C22.2 No.
60950-00, and TUV approved to EN 60950-1,
IEC 60950-1
Applications
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Intermediate Bus Architectures
Telecommunications equipment
LAN/WAN
Data processing
Description
The QTS48T25120 bus converter provides an isolated step-down voltage from 48V to 12.0V nominal. The QTS is
an unregulated converter; therefore output voltage is directly proportional to input voltage with a conversion ratio of
4:1. The converter provides ultra-high efficiency; as a result very little heat is dissipated and a heat sink is not
required.
The QTS48T25120 is an excellent choice for intermediate bus application where multiple output voltages are
required and a 12.0V rail will be used to power point-of-load devices.
Model Selection
Model
Input
Voltage
VDC
42-53
38-53
Input
Current,
Max ADC
7.5
7.5
Output
Voltage
Vout,@ 48Vin
VDC
12.0
12.0
Output
Current
ADC
25
25
Output
Ripple/Noise,
Typical
Efficiency @
48Vi, 25A
96.2
96.2
mV p-p (typ.)
75
75
QTS48T25120-NDA0
QTS48T25120-NCAS2
This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be
followed.
MAY 31, 2005 revised to JUN 15, 2006
Page 1 of 8
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