TEA1552T中文资料DCM或QR模式下具有高压启动的反激控制器；125 kHz f_osc(h)；可输出待机信号数据手册恩XP规格书

描述 Description

GreenChipII是第二代绿色环保开关电源（SMPS）控制器IC，可直接使用整流后的全电压市电工作。高集成度使电源应用只需极少的外部器件，因而经济有效。
专用内置绿色节能特性可满足各种功率水平的高效运行需求。这适用于高功率水平的准谐振工作，以及中等功率水平谷底开关的固定频率工作。在低功耗（待机）水平，该系统在降频模式下工作，仍具有谷底检测。
恩智浦专用的高压BCD800工艺使得直接从整流过的市电电压启动成为可能，这种方式既有效又环保。第二低压BICMOS芯片用于高速精确保护与控制。
使用GreenChipII控制IC可以轻松设计高效、可靠的电源。

特性 Features

Distinctive features:

Universal mains supply operation (70 V AC to 276 V AC)

High level of integration, giving a very low external component count


Green features:

Valley or zero voltage switching for minimum switching losses

Efficient quasi-resonant operation at high power levels

Frequency reduction at low power standby for improved system efficiency (<3 W)

Cycle skipping mode at very low loads. Pi< 300 mW at no-load operation for a
typical adapter application

On-chip start-up current source

Standby indication pin to indicate low output power consumption


Protection features:

Safe restart mode for system fault conditions

Continuous mode protection by means of demagnetization detection (zero
switch-on current)

Accurate and adjustable overvoltage protection (latched)

Short winding protection

Undervoltage protection (foldback during overload)

Overtemperature protection (latched)

Low and adjustable overcurrent protection trip level

Soft (re)start

Mains voltage-dependent operation-enabling level

General purpose input for lock protection

应用 Application

Typical application
Typical application areas are adapters and chargers (e.g. for laptops, camcorders and
printers) and all applications that demand an efficient and cost-effective solution up to
250 W.