DC/DC Converters & Regulators

QM48T14120-NDB0G

Manufacturer Part NumberQM48T14120-NDB0G
DescriptionDC/DC Converters & Regulators
ManufacturerPOWER ONE
TypeStep Down
QM48T14120-NDB0G datasheet
 


Specifications of QM48T14120-NDB0G

Output Power168WOutput Current14A
Input Voltage48VOutput Voltage12V
Screening LevelIndustrialProduct Length (mm)36.83mm
Product Height (mm)7.08mmProduct Depth (mm)58.42mm
Mounting StyleThrough HolePin Count8
Number Of Outputs1Package / CaseQuarter-Brick
ProductIsolatedInput Voltage Range36 V to 75 V
Input Voltage (nominal)48 VOutput Voltage (channel 1)12 V
Output Current (channel 1)14 AIsolation Voltage2000 V
Package / Case SizeQuarter BrickLead Free Status / RoHS StatusCompliant
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
Page 1/20

Download datasheet (307Kb)Embed
Next
Applications
 Telecommunications
 Data communications
 Wireless communications
 Servers, workstations
Benefits
 High efficiency – no heat sink required
 Higher current capability at 70
°C
competitors’ 12 V half-bricks
Description
The QM48T/S14120 converter of the QM-Series provides outstanding thermal performance in high temperature
environments. This performance is accomplished through the use of patented/patent-pending circuits, packaging,
and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile.
The low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing
cooling for both upstream and downstream devices. The use of 100% automation for assembly, coupled with
advanced electronic circuits, and thermal design results in a product with extremely high reliability.
Operating from a 36-75 V input, the QM-Series converters provide outputs that can be trimmed from –20% to
+10% of the nominal output voltage, thus providing outstanding design flexibility.
The paralleling version of the QM48T/S14120-wxyP converter has the paralleling capability for use in applications
requiring higher power levels than available with a single converter.
ZD-00376 Rev. 1.1.1, 19-Feb-10
QM48T/S14120 DC-DC Converter Data Sheet
36-75 VDC Input; 12 VDC @ 14 A Output
Features
 RoHS lead-free solder and lead-solder-exempted
products are available
 Delivers up to 14 A (168 W)
 Industry-standard quarter-brick pinout
 Available: through-hole and surface-mount packages
 Weight: 1.1 oz [31.5 g] typical
 On-board input differential LC-filter
 Start-up into pre-biased load
 No minimum load required
 Meets Basic Insulation requirements of IEC60950
 Withstands 100 V input transient for 100 ms
 Fixed-frequency operation
 Fully protected
 Remote output sense
 Fully protected with automatic recovery
 Paralleling option available
 Positive or negative logic ON/OFF option
 Output voltage trim range: +10%/−20% with
industry-standard trim equations
 High reliability: MTBF approx. 2.6 million hours,
calculated per Telcordia TR-332, Method I Case 1
 Safety approved to UL60950-1, CSA60950-1,
EN60950-1 and IEC60950-1.
 Designed to meet Class B conducted emissions per
than many
FCC and EN55022 when used with external filter
 All materials meet UL94, V-0 flammability rating
Page 1 of 20
www.power-one.com

QM48T14120-NDB0G Summary of contents

  • Page 1

    Applications  Telecommunications  Data communications  Wireless communications  Servers, workstations Benefits  High efficiency – no heat sink required  Higher current capability at 70 °C competitors’ half-bricks Description The QM48T/S14120 converter of the QM-Series provides ...

  • Page 2

    Electrical Specifications (Common for both Non-paralleling and Paralleling Options) Conditions ºC, Airflow = 300 LFM (1.5 m/s VDC, unless otherwise specified. A Parameter Absolute Maximum Ratings Input Voltage Operating Ambient Temperature Storage Temperature ...

  • Page 3

    Electrical Specifications for Single Converter with Non-Paralleling Option Conditions ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified. A Parameter Maximum Input Current Output Voltage Set Point (no load) Output Regulation Over ...

  • Page 4

    Operations Input and Output Impedance These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. In many applications, the inductance associated with the distribution from the power source ...

  • Page 5

    When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating ...

  • Page 6

    Protection Features Input Undervoltage Lockout Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage. The input voltage must be typically 34 V for the converter to turn ...

  • Page 7

    Startup Information (using negative ON/OFF) Scenario #1: Initial Startup From Bulk Supply ON/OFF function enabled, converter started via application See Figure E. IN Time Comments t ON/OFF pin is ON; system front end power is 0 toggled ...

  • Page 8

    Characterization General Information The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mountings, efficiency, startup parameters, output ripple and noise, transient ...

  • Page 9

    QM48T/S14120-wxy0 (Non-parallelable version 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 4 100 LFM (0.5 m/s) 30 LFM (0.15 m/ Ambient Temperature [°C] ...

  • Page 10

    QM48T/S14120-wxy0 (Non-parallelable version) 18.00 15.00 12.00 9.00 6.00 3.00 0. Load Current [Adc] Fig. 5: Power dissipation vs. load current and input voltage for converter mounted vertically with air flowing from pin 3 to pin 1 ...

  • Page 11

    QM48T/S14120-wxy0 (Non-parallelable version) Fig. 9: Output voltage response to load current step- change (3.5 A – – 3 Vin = 48 V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (2 A/div). Bottom trace: ...

  • Page 12

    QM48T/S14120-wxy0 (Non-parallelable version Iout [Adc] Fig. 13: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic ZD-00376 ...

  • Page 13

    QM48T/S14120-wxyP (Parallelable version 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 4 100 LFM (0.5 m/s) 30 LFM (0.15 m/ Ambient Temperature [°C] ...

  • Page 14

    QM48T/S14120-wxyP (Parallelable version Load Current [Adc] Fig. 5: Power dissipation vs. load current and input voltage horizontally for converter mounted with air flowing from pin 3 to pin ...

  • Page 15

    QM48T/S14120-wxyP (Parallelable version) Fig. 9: Output voltage response to load current step- change (3.5 A – – 3 Vin = 56 V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (2 A/div). Bottom trace: ...

  • Page 16

    QM48T/S14120-wxyP (Parallelable version) Fig. 13: Step Load response to 0% – 50% – 0% with 100 µF external ceramic capacitor and di/ A/µs. Top trace: output voltage (500 mV/div.). Bottom trace: load current (10 A/div). Time scale: 0.2 ...

  • Page 17

    QM48T/S14120-wxyP (Parallelable version) Fig. 17: Input reflected ripple current, i measured through 10 µH at the source at full rated load current and Vin = 56 V. Refer to Fig. I for test setup. Time scale: 1 µs/div. Fig. 19: ...

  • Page 18

    QM48T/S14120-wxyP (Parallelable version) 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 13.50 14.00 14.50 15.00 15.50 Iout[Adc] Fig. 21: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current ...

  • Page 19

    Physical Information 1 TOP VIEW 2 3 SIDE VIEW QM48S (Surface-mount) 1 TOP VIEW 2 3 SIDE VIEW QM48T (Through-hole Height (Max. Height) (Min. Clearance) Option +0.000 [+0.00] +0.016 [+0.41] -0.038 [- 0.97] -0.000 [- 0.00] A 0.325 ...

  • Page 20

    Converter Part Numbering/Ordering Information Rated Product Input Mounting Load Series Voltage Scheme Current  Surface- Quarter- mount Brick 36- Format T Through- hole The example above describes P/N QM48S14120-NS00: 36-75 V input, ...