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Complete interface between LNBS and I虜C bus

Built-in DC-DC converter for single 12 V supply

operation and high efficiency (typ. 93%@0.5 A)

Selectable output current limit through external

resistor

Compliant with main satellite receivers output

voltage specification

New accurate built-in 22 kHz tone generator

meets widely accepted standards (patent

pending)

Fast oscillator start-up facilitates DiSEqC

鈩?/div>

encoding

Built-in 22 kHz tone detector supports bi-

directional DiSEqC

鈩?/div>

2.0

Very low-drop post regulator and high

efficiency step-up PWM with integrated power

N-MOS allow low power losses

Two output pins suitable for bypassing the

output R-L filter and avoiding tone distortion (R-

L filter as per DiSEqC

鈩?/div>

2.0 specs, see typ.

application circuits)

Overload and over-temperature internal

protections with I虜C diagnostic bits

Output voltage and output current level

diagnostic feedback by I虜C bits

LNB short circuit dynamic protection

+/- 4 kV ESD tolerant on output power pins

PowerSSO-36 (ePad)

鈻?/div>

monolithic voltage regulator and interface IC,

assembled in PowerSSO-36 ePad, specifically

designed to provide the 13/18 V power supply and

the 22 kHz tone signalling for two independent

LNB down-converters in the antenna dishes

and/or multi-switch box. In this application field, it

offers a dual tuner STBs with extremely low

component count, low power dissipation together

with simple design and I

2

C standard interfacing.

鈻?/div>

Description

Intended for analog and digital DUAL Satellite

receivers/Sat-TV, sat-PC cards, the LNBH24 is a

Table 1.

Device summary

Order code

LNBH24PPR

Package

PowerSSO-36 (Exposed pad)

Packaging

Tape and reel

February 2008

Rev 1

1/30

www.st.com

30

型號

版本

描述

廠商

下載
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