POWER-ONE QLS25ZD, QLS25ZE, QLS20ZG Datasheet

QLS30 Series – 30A Quarter-Brick DC/DC Converter 48V Input Data Sheet

1.8V, 1.5V, 1.2V Output

REV. 10/1 Page 1 of 8

Applications

• Distributed power architectures

• Telecommunications equipment

• LAN/WAN applications

• Data processing applications

Features

• Cost-effective single board design

• Low profile – 11 mm height

• Input/output isolation: 1500VDC, basic

insulation

• High efficiency

• 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, positive or negative

• UL 1950 Recognition, CSA 22.2 No. 950-95 certification, TUV IEC950

Description

The new QLS30 series of single-output DC/DC converters features single board, multi-layer construction and an SMT design that is highly reliable due to the low component count and minimal manufacturing touch time. The QLS30 series uses fewer components than any other equivalently rated single board converter. The converters can deliver a maximum of 30 Amps with a typical efficiency of 85%. The QLS provides superior thermal performance, with minimal derating. The QLS30ZB model converter can deliver 22.8 amperes at 1.8 volt output in ambient conditions of 65°C and 200 LFM. This full featured, low profile converter offers input undervoltage lockout, overload, overvoltage and overtemperature protection. Interface features include remote on/off, remote sense and output voltage trim.

Selection Chart

Model Input

voltage

VDC

Input

current,

max

ADC

Output

voltage

Vout,

VDC

Output rated

current

rated,

ADC

Output

Ripple/Noise,

mV p-p

Typical

Efficiency

@ I

rated,

QLS30ZB 36-75 1.5 1.8 30 100 86 QLS30ZA 36-75 1.3 1.5 30 100 85 QLS30ZY 36-75 1.1 1.2 30 100 84

This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment

should be followed

QLS30 Series – 30A Quarter-Brick DC/DC Converter 48V Input Data Sheet

1.8V, 1.5V, 1.2V Output

REV. 10/1 Page 2 of 8

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect long-term reliability and cause permanent damage to the converter.

Parameter Conditions/Description Min Max Units

Input voltage Continuous

Transient, 100mS

100

VDC VDC

Operating Temperature At 100% load -40 100

°C

Storage Temperature -40 125

°C

ON/OFF Control Voltage Referenced to -Vin 50 VDC

Environmental and Mechanical Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter Conditions/Description Min Nom Max Units

Shock Halfsine wave, 3 axes 50 g

Sinusoidal Vibration GR-63-Core, Section 5.A.2 1

Weight 1.2/35 Oz/g

Water Washing Standard process Yes

MTBF Per Bellcore TR-NWT-000332 1,980 kHrs

Isolation Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter Conditions/Description Min Nom Max Units

Insulation Safety Rating Basic

Isolation Voltage 1500 VDC

Isolation Resistance 10 MOhm

Isolation Capacitance 1800 pF

Input Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter Conditions/Description Min Nom Max Units

Input Voltage Continuous 36 48 75 VDC Turn-On Input Voltage Ramping Up 33 VDC Turn-Off Input Voltage Ramping Down 32 VDC

Turn-On Time To Output Regulation Band

100% Resistive Load

510mS

Input Reflected Ripple Current Full Load, 12uH source

inductance

50 mA p-p

Inrush Transient Vin=Vin.max 0.1 A2s

QLS30 Series – 30A Quarter-Brick DC/DC Converter 48V Input Data Sheet

1.8V, 1.5V, 1.2V Output

REV. 10/1 Page 3 of 8

Output Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter Conditions/Description Min Nom Max Units

Output Voltage Setpoint Accuracy Vin=Vin.nom, Full Load -1 1 %Vout

Output Current*

See selection chart for I

rated

10 100

rated

Line Regulation

Vin.min to Vin.max, I

rated

0.2 %Vout

Load Regulation Vin=Vin.nom, 10% to

100%I

rated

0.2 %Vout

Total output voltage regulation Over all input voltage, load,

and temperature conditions

-2 2 %Vout

Remote Sense Headroom 0.5 VDC

Dynamic Regulation

Peak Deviation

Settling Time

50-75% load step change

to 1% error band

500

%Vout

µS

Admissible Load Capacitance

rated

, Nom Vin

20,000

µF

Output Current Limit Threshold** Vout=0.97Vout.nom 110 140

rated

Switching Frequency 300 kHz

Overvoltage Protection,

Non Latching

Over all input voltage and

load conditions

120 140 %Vout

Trim Range

rated

, Vin=Vnom

90 110 %Vout

* At Iout<Iout.min, the output may contain low frequency component that exceeds ripple specifications. ** Overcurrent protection is non-latching with auto recovery.

Feature Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter Conditions/Description Min Nom Max Units

Shutdown (ON/OFF)

Negative Logic

Converter ON Source Current Converter OFF

Open Circuit Voltage

Positive Logic

Converter ON

Open Circuit Voltage

Converter OFF Source Current

On/Off signal is low – converter is ON

ON/OFF pin is connected to -Vin

ON/OFF pin is floating

On/Off signal is low –converter is OFF

ON/OFF pin is floating

ON/OFF pin is connected to -Vin

-1.0

3.5

-1.0

2.1

2.5

2.0

1.8

150

1.8 1

VDC

mADC

VDC VDC

VDC VDC VDC

mADC

Overtemperature

Protection

Average Board Temperature 105

°C

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