QLS15 DC-DC Series Data Sheet
12A, 15A Quarter-Brick
Features
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RoHS lead solder exemption compliant
Cost-effective single board design
Low profile – 0.390” (9.9 mm)
Input/output isolation: 1500 VDC, Basic
insulation
High efficiency (89%, 5 Vout)
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
Data processing
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 provides 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 heat sink at 70°C and 200 LFM airflow.
Model Selection
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
Model numbers highlighted in yellow or shaded are not recommended for new designs.
MCD10051 Rev. 1.0
Page 1 of 2
www.power-one.com
QLS15 DC-DC Series Data Sheet
12A, 15A Quarter-Brick
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.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or 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.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on
the date manufactured. Specifications are subject to change without notice.
MCD10051 Rev. 1.0
Page 2 of 2
www.power-one.com
