LNBH25L

更新时间： 2024-11-27 12:46:35

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
28页	909K
描述
LNB supply and control IC with step-up and I2C interface

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LNBH25L 数据手册

LNBH25L

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 receiver output

voltage specifications

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

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.

■ Low-drop post regulator and high efficiency

step-up PWM with integrated power N-MOS

allowing low power losses

■ Overload and overtemperature internal

protection 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

Description

Intended for analog and digital satellite

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

LNBH25L 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

Table 1.

Device summary

Order code

Package

Packaging

LNBH25LPQR

QFN24 (4 x 4)

Tape and reel

February 2012

Doc ID 022634 Rev 2

1/28

www.st.com

12 3 4 5 6 7...28

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LNBH25LPQR	STMICROELECTRONICS	获取价格	LNB supply and control IC with step-up and I2C interface
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