QLS15 Series – 12A, 15A Quarter-Brick DC/DC Converter
48V Input
Single Output
Product Brief
Features
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Cost-effective single board design
Low profile – 0.390” (9.9 mm)
Input/output isolation: 1500VDC, basic
insulation
High efficiency (89%, 5Vout)
Output back-drive protection
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Remote sense
Set point accuracy
±
1%
Remote on/off (primary referenced), positive
or negative logic
Output voltage trim adjust +/-10 %
UL 1950 Recognition, CSA 22.2 No. 950-95
certification, TUV IEC950
Applications
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Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
Description
The QLS15 is a series of highly efficient, cost-effective, low-profile, single-output DC/DC converters in an
industry-standard quarter-brick footprint. The QLS15 series provide onboard conversion of standard telecom
and datacom input voltages into isolated low voltage outputs in a through-hole mounting package. Patent
pending technology combined with state-of-the-art packaging techniques allow the QLS15 series to deliver
full rated output, without the need for a heatsink at 70°C and 200LFM airflow.
Model Selection Chart
Model
Input
voltage
VDC
36-75
36-75
36-75
36-75
Output
voltage
VDC
5.0
3.3
2.5
1.8
Output current,
I
rated
ADC
12
15
15
15
Efficiency
I
rated
%
89
87
85
84
QLS12ZG
QLS15ZE
QLS15ZD
QLS15ZB
Rev. AUG 05, 2002
Page 1 of 2
QLS15 Series – 12A, 15A Quarter-Brick DC/DC Converter
48V Input
Single Output
Product Brief
Physical Information (Through-Hole)
ORDERING INFORMATION
Part Number Suffixes
No Suffix
Positive Enable Logic
NT
Negative Logic, Lucent Trim Compatible
7
0.145” Pin Length
8
0.110” Pin Length
Example: QLS15ZE-8 indicates a 3.3V output model with Positive On/Off logic and a 0.111” length pin.
Notes
1. Consult factory for the complete list of available options.
2. Power-One products are not authorized for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional President of Power-One, Inc.
3. Specifications are subject to change without notice.
Rev. AUG 05, 2002
Page 2 of 2
Embedded System
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