Datasheet > LNBH25PQR

LNBH25PQR

更新时间： 2024-11-25 01:21:47

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
34页	1055K
描述
Selectable output current limit by external resistor

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LNBH25PQR 数据手册

LNBH25

LNB supply and control IC with step-up and I²C interface

Features

■ Complete interface between LNB and I²C bus

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

operation and high efficiency (typ. 93 % @

0.5 A)

■ Selectable output current limit by external

resistor

■ Compliant with main satellite receivers output

voltage specification (15 programmable levels)

QFN24 (4 x 4 mm)

■ Accurate built-in 22 kHz tone generator suits

widely accepted standards

■ 22 kHz tone waveform integrity guaranteed

also at no load condition

■ Low-drop post regulator and high efficiency

step-up PWM with integrated power N-MOS

allowing low power losses

Description

Intended for analog and digital satellite

■ LPM function (low power mode) to reduce

receivers/Sat-TV and Sat-PC cards, the LNBH25

is a monolithic voltage regulator and interface IC,

assembled in QFN24 4x4 specifically designed to

provide the 13/18 V power supply and the 22 kHz

tone signalling to the LNB down-converter in the

antenna dish or to the multi-switch box. In this

application field, it offers a complete solution with

extremely low component count and low power

dissipation together with a simple design and I²C

standard interfacing.

dissipation

■ Overload and overtemperature internal

protections with I²C diagnostic bits

■ LNB short-circuit dynamic protection

■ +/- 4 kV ESD tolerant on output power pins

Applications

■ STB satellite receivers

■ TV satellite receivers

■ PC card satellite receivers

Table 1.

Device summary

Order code

Package

Packaging

LNBH25PQR

QFN24 (4 x 4)

Tape and reel

February 2012

Doc ID 022433 Rev 4

1/34

www.st.com

12 3 4 5 6 7...34

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