A8290集成電路（IC）的特殊用途穩(wěn)壓器規(guī)格書PDF中文資料

A8290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A8290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，適用于特定的復雜應用。因此，各種產(chǎn)品特性集差異較大，包括空燃比傳感器接口、汽車交流發(fā)電機電壓調(diào)節(jié)、DDR 端接、液體透鏡控制、摩托車轉(zhuǎn)向信號控制、熱電 (peltier) 冷卻器控制、壓電觸覺控制、閥門控制、小型發(fā)動機管理等。

Features and Benefits

? 2-wire serial I2C? -compatible interface: control (write) and

status (read)

? LNB voltages (16 programmable levels) compatible with

all common standards

? Tracking switch-mode power converter for lowest dissipation

? Integrated converter switches and current sensing

? Output current limit of 900 mA typical, with 48 ms timer

? Static current limit circuit allows full current at startup and

13→18 V output transition; reliably starts wide load range

? Push-pull output stage minimizes 13→18 V and 18→13 V

output transition times for highly capacitive loads

? Adjustable rise/fall time via external timing capacitor

? Built-in tone oscillator, factory-trimmed to 22 kHz

facilitates DiSEqC? tone encoding, even at no-load

? Four methods of 22 kHz tone generation, via I2C? data

bits and/or external pin

? Filter bypass MOSFET minimizes losses during tone transmit

? 22 kHz tone detector facilitates DiSEqC? 2.0 decoding

? Diagnostics for output voltage level, input supply UVLO,

and DiSEqC? tone output

? Auxiliary modulation input

? LNB overcurrent with timer

? Cable disconnect diagnostic