A8295SESTR-T Allegro Microsystems Inc, A8295SESTR-T Datasheet

A8295SESTR-T

Manufacturer Part Number

A8295SESTR-T

Description

IC REG LNB SGL SUPPLY 20-QFN

Manufacturer

Allegro Microsystems Inc

Datasheet

1.A8295SESTR-T.pdf (2 pages)

Specifications of A8295SESTR-T

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A8295SESTR-T

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

H&T Electronics

Part Number:

A8295SESTR-T

Quantity:

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Allegro | Product | A8295 Single LNB Supply and Control Voltage Regulator

http://www.allegromicro.com/en/Products/Part_Numbers/8295/

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A8295

Single LNB Supply and Control Voltage Regulator

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Features

Description

Intended for analog and digital satellite receivers, this single low noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator, specifically

designed to provide the power and the interface signals to an LNB down converter via coaxial cable. The A8295 requires few external components, with the boost switch and

compensation circuitry integrated inside of the device. A high switching frequency is chosen to minimize the size of the passive filtering components, further assisting in cost

reduction. The high levels of component integration ensure extremely low noise and ripple figures.

The A8295 has been designed for high efficiency, utilizing the Allegro® advanced BCD process. The integrated boost switch has been optimized to minimize both switching and

static losses. To further enhance efficiency, the voltage drop across the tracking regulator has been minimized.

For DiSEqC™ communications, a tone control pin is provided to gate the internally-generated 22 kHz tone on-and-off.

A comprehensive set of fault registers are provided, which comply with all the common standards, including: overcurrent, thermal shutdown, undervoltage, and power not good.

The device uses a 2-wire bidirectional serial interface, compatible with the I2C™ standard, that operates up to 400 kHz.

The A8295 is supplied in a lead (Pb) free package.

Functional Block Diagram

A8295SESTR-T

APEK8295SES-01-T DEMO BOARD

Part Number

•

Integrated boost MOSFET, current sensing, and compensation

Supplies up to 550 mA continuously

Supplies up to 700 mA for reconfiguration

Adjustable LNB output current limit from 300 to 800 mA

Boost peak current limit scales with LNB current limit setting

8 programmable LNB output voltage (DAC) levels

LNB overcurrent limiter with shutdown timer

Tracking boost converter minimizes power dissipation

LNB transition times configurable by external capacitor

Push-pull LNB output stage maintains 13→18 V and

18→13 V transition times, even with highly capacitive loads

Built-in 22 kHz tone oscillator facilitates DiSEqC™ tone encoding, even at no-load

Tone generation does not require additional external components

Diagnostic features: PNG, TDET

Dynamic tone detect amplitude and frequency transmit/receive thresholds

Extensive protection features: UVLO, OCP, TSD, CPOK

2-wire I2C-compatible interface

Products

Allegro Marketing

Part Numbers

Package Type

20-lead QFN

for datasheet.

/ A8295

Compliant

RoHS

Yes

Part Composition/

RoHS Data

view data

-20 °C to 85 °C

Temperature Comments

Complete Part Numbers

new

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or check distributor stock

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Samples/Demo

All

Distributor Stock

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Page 1 of 2

10/4/2011

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