High Efficiency, Main Power Supply Controller for Notebook Computer

General Description The RT8223N is a dual step-down, switch-mode power supply controller generating logic-supply voltages in battery-powered systems. It includes two Pulse Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and also features fixed 5V/3.3V linear regulators. Feat

笔记本电脑主电源供应控制器

RT8223N 是一款双通道开关模式降压控制器，用于电池供电系统中为逻辑电路部分提供电源供应。它包含了两组输出电压可在 2V~5.5V 调节的 PWM 控制器和两组恒定电压（5V/3.3V）的线性稳压器。每个线性稳压器可以提供 100mA 输出电流，并可自动切换到 PWM 控制器的输出以提高效率。RT8223N 包含内置的上电时序管理能力、电源正常状态输出和内置软起动电路，还有内置输出软放电功能可以避免关机期间的负电压问题。它所使用的恒定导通时间（ COT ）模式下的 PWM 控制逻辑无需使用电流检测电阻，在负载发生瞬态变化时具有 100ns 的响应速度，同时还能维持基本恒定的开关切换工作频率 • 采用 COT 控制架构，具有 100ns 负载瞬态变化响应能力\n• 宽输入电压范围：6V~25V\n• 2V~5.5V 的两路可调输出\n• 恒定的 3.3V 和 5V 线性稳压器输出能力为 100mA\n• 2V 参考电压\n• 通过 TONSEL 的不同接法可以进行工作频率选择\n• 通过 RDS(ON) 进行的电流检测具有4700ppm/°C 的温度补偿\n• 可程序设计的电流限制和使能控制结合在单一引脚上\n• 有PWM、DEM和超声工作模式可供选择\n• 内置软起动和软放电功能\n• 效率高达 97%\n• 5mW 静态功率消耗\n• 过热关机保护\n• 符合 RoHS;

FSK Decoder and DTMF Receiver IC

OVERVIEW The SM8223A is a FSK (Frequency shift keying) decoder and DTMF (Dual tone multi-frequency) receiver IC. It is fabricated using a CMOS process and features a power-down function for low power dissipation operation. The FSK decoder and DTMF receiver have the same performance characteristic

ATM Transmitter/Receiver with UTOPIA Interface

The CN8223 ATM Transmitter/Receiver with UTOPIA Level 1 interface provides a single-access ATM service termination for User-to-Network (UNI) and Network-to-Network Interfacing (NNI) in conformance with ATM Forum UNI and NNI Specification 94/0317; Bellcore Specifications TR-TSV-000772, TR-TSV-00077

FSK Decoder and DTMF Receiver IC

OVERVIEW The SM8223A is a FSK (Frequency shift keying) decoder and DTMF (Dual tone multi-frequency) receiver IC. It is fabricated using a CMOS process and features a power-down function for low power dissipation operation. The FSK decoder and DTMF receiver have the same performance characteristic

MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES

DESCRIPTION TheSTV8223Bis a pictureand soundIF processor for multistandardapplication with very few external components and adjustments. It provides the audio and video switches for one SCART plug application. ■ VIDEO PLL DEMODULATION ■ SOUND PLL DEMODULATION ■ NEGATIVE MODULATION ■ AGC FOR

LOW FREQUENCY POWER AMPLIFIER

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