SSQL48T20033-NABBG datasheet, PDF

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SSQL48T20033-NABBG: DescriptionIsolated DC/DC Converters POWER SUPPLY;SSQL48T20033-NABBG;DC-DC;;36-75v;3.3V;20A;TH WITH COLD-PLATE;;NEGATIVE LOGIC; Categorysemiconductor Power management; File Size2MB，15 Pages; ManufacturerBel Power Solutions

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Isolated DC/DC Converters POWER SUPPLY;SSQL48T20033-NABBG;DC-DC;;36-75v;3.3V;20A;TH WITH COLD-PLATE;;NEGATIVE LOGIC

SSQL48T20033-NABBG Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Bel Power Solutions
Product Category	Isolated DC/DC Converters

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The new iPWER™ high performance 20 A SSQL48T20033 DC-DC converter

provides a high efficiency single output, in a 1/16th brick package that is only

56% the size of the industry-standard eighth-brick. Specifically designed for

operation in systems that have limited airflow and increased ambient

temperatures, the SSQL48T20033 converter utilizes the same pin-out and

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

addition, a heat spreader feature is available (-xxxBx suffix) that provides an

effective thermal interface for coldplate and heat sinking options.

The SSQL48T20033 converter thermal performance is accomplished through

the use of patent-pending circuits, packaging, and processing techniques to

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

profile.

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 wide-range 36-75 V input, the SSQL48T20033 converter

provides a fully regulated 3.3 V output voltage. The outputs can be trimmed

from –20% to +10% of the nominal output voltage, thus providing outstanding

design flexibility. Employing a standard power pin-out, the SSQL48T20033

converter is an ideal drop-in replacement for existing high current eighth-brick

designs. Inclusion of this converter in a new design can result in significant

board space and cost savings. The designer can expect reliability

improvement over other available converters because of the SSQL48T20033’s

optimized thermal efficiency.



36-75 VDC Input; 3.3 VDC @ 20 A

Industry-standard eighth-brick pin-out

Withstands 100 V input transient for 100 ms

Fixed-frequency operation

On-board input differential LC-filter

Start-up into pre-biased load

No minimum load required

Hiccup overcurrent protection

Fully protected (OTP, OCP, OVP, UVLO)

Remote sense

High efficiency – no heat sink required (Baseplate/heat spreader option

(suffix ‘-xxxBx’) facilitates heatsink mounting to further enhance the unit’s

thermal capability.)

Remote ON/OFF positive or negative logic option

Output voltage trim range: +10%/−20% with industry-standard trim equations

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

used with external filter

All materials meet UL94, V-0 flammability rating

Approved to the latest edition and amendment of ITE Safety standards, UL/CSA

60950-1 and IEC60950-1

RoHS lead free solder and lead-solder-exempted products are available

SSQL48T20033

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 to the input of the converter can

affect the stability of the converter. The addition of a 33

μF

electrolytic capacitor with an ESR <1

across the input helps to

ensure stability of the converter. In applications where decoupling capacitance is distributed at the load, the power converter

will exhibit stable operation with up to the maximum admissible external load capacitance up to 10,000

μF

and ESR > 1mΩ.

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 Fig. A.

Vin (+)

SSQL 48 Converter

(Top View )

Vout (+)

SENSE (+)

TRIM

SENSE (-)

Rload

Vin

ON /OFF

Vin ( -)

CONTROL

INPUT

Vout (-)

Figure A. Circuit configuration for ON/OFF function.

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

when the ON/OFF pin is left open. See the Electrical Specifications for logic high/low definitions.

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

can be hard wired directly to Vin(-) to enable automatic power up of the converter without the need of an external control

signal.

The ON/OFF pin is internally pulled up to 5 VDC through a resistor. 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. See the Startup Information

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

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). When using remote sense a minimum of 100uF ceramic capacitance should be

mounted between Vout(+) and Vout(-) close to the pin 8 and pin 4.

SSQL 48 Converter

(Top View )

ON /OFF

Vin (+)

Vout (+)

100

SENSE (+)

Vin

TRIM

SENSE

Vin (- )

(-)

Vout ( -)

Figure B. Remote sense circuit configuration.

CAUTION

If remote sensing is not utilized, the SENSE(-) pin must be connected to the Vout(-) pin, and the SENSE(+) pin must be

connected to the Vout(+) pin to ensure the converter will regulate at the specified output voltage. If these connections

are not made, the converter will deliver an output voltage that is slightly higher than the specified data sheet value.

tech.support@psbel.com

SSQL48T20033-NABBG Related Products

	SSQL48T20033-NABBG	SSQL48T20033-NAA0G
Description	Isolated DC/DC Converters POWER SUPPLY;SSQL48T20033-NABBG;DC-DC;;36-75v;3.3V;20A;TH WITH COLD-PLATE;;NEGATIVE LOGIC	Isolated DC/DC Converters 3.3V at 20A 1/16th brick
Product Attribute	Attribute Value	Attribute Value
Manufacturer	Bel Power Solutions	Bel Power Solutions
Product Category	Isolated DC/DC Converters	Isolated DC/DC Converters

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