A8287集成電路（IC）的特殊用途穩(wěn)壓器規(guī)格書(shū)PDF中文資料

A8287屬于集成電路（IC）的特殊用途穩(wěn)壓器。由Allegro MicroSystems制造生產(chǎn)的A8287特殊用途穩(wěn)壓器該系列產(chǎn)品用于電源控制、某種形式的轉(zhuǎn)換，適用于特定的復(fù)雜應(yīng)用。因此，各種產(chǎn)品特性集差異較大，包括空燃比傳感器接口、汽車(chē)交流發(fā)電機(jī)電壓調(diào)節(jié)、DDR 端接、液體透鏡控制、摩托車(chē)轉(zhuǎn)向信號(hào)控制、熱電 (peltier) 冷卻器控制、壓電觸覺(jué)控制、閥門(mén)控制、小型發(fā)動(dòng)機(jī)管理等。

LNB Supply and Control Voltage Regulator

Intended for analog and digital satellite receivers, the LNB (low noise block) converter regulator is a monolithic linear and switching voltage regulator, specifically designed to provide power and interface signals to an LNB downconverter, via coaxial cable.

The device uses a 2-wire bidirectional serial interface, compatible with the I2C (Inter-C bus) standard, that operates up to 400 kHz.

The A8285 is supplied in a 16-lead plastic power SOIC with internally fused leads for thermal dissipation. The A8287 is supplied in a 24-lead plastic power SOIC with internally fused leads. Both devices are also available in lead (Pb) free versions, with 100 matte tine leadframe plating.

FEATURES

■ LNB selection and standby function

■ Provides up to 500 mA load current

■ Two-wire serial I2C interface

■ Built-in tone oscillator, factory-trimmed to 22 kHz; facilitates DiSEqC? 2.0 encoding

■ Auxiliary modulation input

■ 22 kHz tone detector facilitates DiSEqC? decoding (A8287 only)

■ Tracking switch-mode power converter for lowest dissipation

■ LNB overcurrent protection and diagnostics

■ Internal overtemperature protection

■ LNB voltages (16 possible levels) compatible with all common standards