A8292中文资料双LNB电源与控制稳压器 (Dual LNB Supply and Control Voltage Regulator)数据手册Allegro规格书

描述 Description

Intended for analog and digital satellite receivers, this dual low-noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator, specifically designed to provide the power and the interface signals to two LNB down converters via coaxial cables. The A8292 requires few external components, with the boost switches and compensation circuitry integrated inside of the device. A high switching frequency is chosen to minimize the size of the passive filtering components, further assisting in cost reduction. The high level of component integration ensures extremely low noise and ripple figures.
The A8292 has been designed for high efficiency, utilizing the Allegro advanced BCD process. The integrated boost switches have been optimized to minimize both switching and static losses. To further enhance efficiency, the voltage drop across the tracking regulators has been minimized.
The A8292 has integrated tone detection capability, to support full two-way DiSEqC™ communications. Several schemes are available for generating tone signals, all the way down to no-load, and using either the internal clock or an external time source.
A comprehensive set of fault registers are provided which, comply with all the common standards, including: overcurrent, thermal shutdown, undervoltage, cable disconnect, power not good, and tone detect.
The device uses a 2-wire bidirectional serial interface, compatible with the I2C™ standard, that operates up to 400 kHz.
The A8292 is supplied in a lead (Pb) free 28-lead MLP/QFN with 100% matte tin leadframe plating.
This part is in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change: December 14, 2017.Deadline for receipt of LAST TIME BUY orders: December 1, 2018.
Recommended Substitutions: generation 4 and 5 devices. For existing customer transition, and for new customers or new applications, contact Allegro Sales.

特性 Features

•2-wire serial I2C™-compatible interface: control (write) and status (read)
•Tracking switch-mode power converter for lowest dissipation
•Provides up to 500 mA per channel and 750 mA total
•Push-pull output stage minimizes 13→18 V and 18→13 V output transition times for highly capacitive loads
•Built-in tone oscillator, factory-trimmed to 22 kHz facilitates DiSEqC™ tone encoding, even at no-load
•22 kHz tone detector facilitates DiSEqC™ 2.0 decoding
•LNB overcurrent with timer
•Cable disconnect diagnostic

简介

A8292属于集成电路（IC）的特殊用途稳压器。由制造生产的A8292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。