LNBH23数据手册集成电路（IC）的特殊用途稳压器规格书PDF

描述 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 (5 x 5 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 I²C standard interfacing.

特性 Features

• Complete interface between LNB and I²C bus
• Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% @ 0.75 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)
• Fast oscillator start-up facilitates DiSEqC™ encoding
• Built-in 22 kHz tone detector supports bi-directional DiSEqC™ 2.0
• Very low-drop post regulator and high efficiency step-up PWM with integrated power NMOS 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™ 2.0 specs, see typ. application circuits)
• Overload and over-temperature internal protections with I²C diagnostic bits
• Output voltage and output current level diagnostic feedback by I²C bits
• LNB short circuit dynamic protection
• ± 4 kV ESD tolerant on output power pins

简介

LNBH23属于集成电路（IC）的特殊用途稳压器。由制造生产的LNBH23特殊用途稳压器该系列产品用于电源控制、某种形式的转换，适用于特定的复杂应用。因此，各种产品特性集差异较大，包括空燃比传感器接口、汽车交流发电机电压调节、DDR 端接、液体透镜控制、摩托车转向信号控制、热电 (peltier) 冷却器控制、压电触觉控制、阀门控制、小型发动机管理等。