UIS48T06120NDABG datasheet, PDF

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UIS48T06120NDABG: DescriptionLDO Voltage Regulators 150-mA Low-Noise 1.5% tolerance; Categorysemiconductor Power management; File Size2MB，17 Pages; ManufacturerBel; Websitehttp://www.belfuse.com

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UIS48T06120NDABG Overview

LDO Voltage Regulators 150-mA Low-Noise 1.5% tolerance

UIS48T06120NDABG Parametric

Parameter Name	Attribute value
Product Category	Isolated DC/DC Converters
Manufacturer	Bel
RoHS	Details
Number of Outputs	1 Output
Output Power	72 W
Input Voltage	18 V to 75 V
Output Voltage-Channel 1	12 V
Output Current-Channel 1	6 A
Isolation Voltage	2250 VDC
Mounting Style	Chassis
Length	2.3 in
Width	1.45 in
Height	0.5 in
Operating Temperature Range	- 40 C to + 85 C
Packaging	Bulk
Product	Isolated
Factory Pack Quantity	56
Unit Weight	2.186986 oz

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The high performance 6A UIS48T06120 DC-DC converter provides a high

efficiency single output, in a 1/16th brick package. Specifically designed for

operation in systems that have limited airflow and increased ambient

temperatures, the UIS48T06120 converter utilizes the same pinout and

Input/Output functionality of the industry-standard sixteenth bricks. In

addition, a baseplate / heat spreader feature is available (-xDxBx suffix) that

provides an effective thermal interface for coldplate and heat sinking options.

The UIS48T06120 converter thermal performance is accomplished through

the use advanced circuits, packaging, and processing techniques to achieve

ultra-high efficiency, excellent thermal management, and a low-body profile.

Operating from a wide-range 18-75V input, the UIS48T06120 converter

utilizes digital control and provides a fully regulated 12V output voltage. The

designer can expect reliability improvement over other available converters

because of the UIS48T06120’s optimized thermal efficiency.

Key Features & Benefits



•

Industry-standard sixteenth-brick pin-out

Ultra wide input voltage range

Delivers 72W at 91% efficiency

Paste In Hole (PIH) compatible

Withstands 100V input transient for 100ms

Fixed-frequency operation

On-board input differential LC-filter

Start-up into pre-biased load

No minimum load required

Minimum of 2250 V

I/O isolation

Fully protected (OTP, OCP, OVP, UVLO)

Positive or negative logic ON/OFF option

Low height of 0.44” (11.5mm)

Weight: 18 g without baseplate / heat spreader,

24 g with baseplate / heat spreader

High reliability: MTBF = 14.3 million hours, calculated per Telcordia SR-332,

Method I Case 1

Approved to the latest edition of the following standards:

UL/CSA60950-1, IEC60950-1 and EN60950-1

Designed to meet Class B conducted emissions per FCC and EN55022 when

used with external filter

All materials meet UL94, V-0 flammability rating

Applications



Intermediate Bus Architectures

Data communications/processing

LAN/WAN

Servers, storage, instrumentation, embedded equipment

UIS48T06120

3. OPERATIONS

3.1. 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.

However, in some applications, the inductance associated with the distribution from the power source to the input of

the converter can affect the stability of the converter. A 100 µF electrolytic capacitor with adequate ESR based on input

impedance is recommended to ensure stability of the converter.

In many end applications, a high capacitance value is applied to the converter’s output via distributed capacitors. The

power converter will exhibit stable operation with external load capacitance up to 2200 µF.

3.2. ON/OFF (PIN 2)

The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote

control options available, positive and negative logic, with both referenced to Vin(-). A typical connection is shown in

Figure A.

The positive logic version turns on when the ON/OFF pin is at a logic high or left open and turns off when it is at a logic

low. See the Electrical Specifications for logic high/low definitions.

Fig. A: Typ. Circuit configuration for ON/OFF function.

UIS 48 Converter

(Top View )

Vin

ON /OFF

Vin (+)

Vout (+)

SENSE

(+)

Rload

TRIM

SENSE

(- )

Vin (-)

CONTROL

INPUT

Vout (-)

The negative logic version turns on when the ON/OFF pin is at a logic low and turns off when the pin is at logic high.

To enable automatic power up of the converter without the need of an external control signal the ON/OFF pin can be

hard wired directly to Vin(-) for N and left open for P version.

A properly de-bounced mechanical switch, open-collector transistor, or FET can be used to drive the input of the

ON/OFF pin. The device must be capable of sinking up to 0.2 mA at a low level voltage of



0.8 V. An external voltage

source (±20 V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing

or sinking up to 1 mA depending on the signal polarity. If optocoupler is used to control the on/off, then the ON/OFF

pin should be tied to a 3V3 rail via 3.3kohm resistor to prevent optocoupler leakage from affecting the on/off function.

See the Startup Information section for system timing waveforms associated with use of the ON/OFF pin.

3.3. SENSE (PINS 5 AND 7)

The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the

converter and the load. The SENSE (-) (Pin 5) and SENSE (+) (Pin 7) pins should be connected at the load or at the point

where regulation is required (see Fig. B).

Fig. B: Remote sense circuit configuration.

tech.support@psbel.com

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