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Complete interface between LNB and I虜C bus

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

operation and high efficiency (Typ. 93% @

0.75 A), with integrated NMOS

Selectable output current limit by external

resistor

Compliant with main satellite receiver systems

specifications

New accurate built-in 22 kHz tone generator

suits widely accepted standards (patent

pending) see

Figure 1

and

Figure 4

Fast oscillator start-up facilitates DiSEqC

TM

encoding

Built-in 22 kHz tone detector supports bi-

directional DiSEqC

TM

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 to by-pass the output

R-L filter and avoid any tone distortion (R-L

filter as per DiSEqC

TM

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-24

(Exposed pad)

QFN32 (5x5mm)

(Exposed pad)

鈻?/div>

Description

Intended for analog and digital satellite

receivers/Sat-TV, sat-PC cards, the LNBH23 is a

monolithic voltage regulator and interface IC,

assembled in PowerSSO-24 ePAD and QFN32

(5x5 mm) ePAD, 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, low power

dissipation together with simple design and I虜C

standard interfacing.

鈻?/div>

Table 1.

Device summary

Order code

LNBH23PPR

LNBH23QTR

(1)

Package

PowerSSO-24 (Exposed pad)

QFN32 (Exposed pad)

Packaging

Tape and reel

1. Available on request.

March 2008

Rev 4

1/32

www.st.com

32

其它有關(guān)文件
LNBH23 View All Specifications
標準包裝
1
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - 專用型
系列
-
應用
轉(zhuǎn)換器，模擬和數(shù)字式衛(wèi)星信號 STB 接收器/SatTV
輸入電壓
8 V ~ 15 V
輸出數(shù)
1
輸出電壓
13.4V，18.5V
工作溫度
0°C ~ 85°C
安裝類型
表面貼裝
封裝/外殼
PowerSSO-24
供應商設備封裝
PowerSSO-24
包裝
Digi-Reel®
配用
497-8717-ND - DEMO BOARD BASED ON LNBH23497-8336-ND - BOARD EVAL BASED ON LNBH23
其它名稱
497-6121-6

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