LNBH23L datasheet(1/25 Pages) STMICROELECTRONICS

部件名	LNBH23L

功能描述	Selectable output current limit by external resistor

PDF	25 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 25 page

November 2010

Doc ID 15335 Rev 4

1/25

25

LNBH23L

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

■ Auxiliary modulation input (EXTM pin)

facilitates DiSEqC™ 1.X encoding

■ Accurate built-in 22 kHz tone generator suits

widely accepted standards

■ Low-drop post regulator and high efficiency

step-up PWM with integrated power NMOS

allow low power losses

■ Overload and over-temperature 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

Description

Intended for analog and digital satellite receivers,

the LNBH23L is a monolithic voltage regulator

and interface IC, assembled in QFN32 5 x 5

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 I²C standard interfacing.

QFN32 (5 x 5 mm)

(Exposed pad)

Table 1.

Device summary

Order code

Package

Packaging

LNBH23LQTR

QFN32 (5 x 5 mm) Exposed pad

Tape and reel

www.st.com

类似零件编号 - LNBH23L

制造商	部件名	数据表	功能描述
STMicroelectronics	LNBH23LQTR	483Kb / 25P	LNB supply and control IC with step-up and I2C interface 29-Nov-2010

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