LNBP9 STMICROELECTRONICS [STMicroelectronics], LNBP9 Datasheet

LNBP9

Manufacturer Part Number

LNBP9

Description

LNB Supply and control voltage regulator

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.LNBP9.pdf (13 pages)

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BOSTOCK HK LIMITED

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LNBP9K7-R

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Feature summary

■

Description

Intended for analog and digital satellite receivers,

the LNBP is a monolithic linear voltage regulator,

assembled in PowerFlex

to provide the powering voltages and the

interfacing signals to the LNB down-converter.

The regulator output can be logic controlled to be

13V or 18V (typ.) by mean of the V

remote controlling of the LNB. In order to reduce

the power dissipation of the device when the

lowest output voltage is selected, the regulator

has 2 supply inputs (V

be powered respectively at 15V (min.) and 22V

(min.), and an internal switch will automatically

select the appropriate supply voltage according to

the selected output voltage.

Order code

September 2006

Simplest integrated solution for the LNB

remote supply and control

500mA Guaranteed output current

Dual input supply for reducing power

dissipation

22KHZ Built-in tone oscillator (LNBP9 version)

Fast oscillator start-up for DiSEqC

(LNBP9 version)

Auxiliary modulation input for more flexibility

(LNBP8 version)

Stand-by function

Short circuit and overtemperature protection

Available in through-hole package

Part number

LNBP8

LNBP9

CC1

and V

, specifically designed

CC2

SEL

). They must

pin for the

encoding

LNB Supply and control voltage regulator

LNBP8K7

LNBP9K7

SPAK-7L

Package

Rev. 3

..The TONE pin (only for the LNBP9 version)

activates the internal oscillator so that the DC

output is modulated by a 22KHz square wave.

This internal oscillator is factory trimmed within a

tolerance of +/- 2KHz, thus no further adjustment

or external components are required. A burst

coding of the 22KHz tone can be accomplished

thanks to the fast response of the TONE input and

the prompt oscillator start-up. This helps

designers which want to implement the

DiSEqC

flexibility and to allow implementation of other

LNB remote control standards, an analogic

modulation input pin (EXTM) is available (LNBP8

version only). An appropriate DC blocking

capacitor must be used to couple the modulating

signal source to the EXTM pin. Both versions

integrate thermal and short circuit protection. The

device is packaged in PowerFlex for an easy

through-hole mounting. If an adequate Heatsink is

provided and higher power losses are acceptable,

both supply pins can be powered by the same

23V source without affecting any other circuit

performance.

When the IC is powered and put in Stand-by (EN

pin LOW), the regulator output is disabled and the

IC power consumption is reduced to 300µA typ.

protocols. In order to improve design

(PowerFlex

SPAK-7L

LNBP8K7-R

LNBP9K7-R

Tape & reel

Packaging

)

LNBP8

LNBP9

www.st.com

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