FAN7554

PWM（脉冲宽度调制）控制器，Fairchild Semiconductor### 离线和隔离直流-直流控制器，Fairchild Semiconductor回扫控制器、线路电平控制 LLC 控制器和初级侧调节控制器显著节能，以满足开关模式电源 SMPS 设计的需要。 所有控制器随附集成软启动和过压、开口反馈、过载、输出短路、过电流、电压中断和欠压闭锁功能。

Description

The is a fixed frequency current mode PWM controller. It is specially designed for off-line and DC to DC converter applications with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated

reference, an ON/OFF control, a high gain error amplifier, a current sensing comparator, and a high current totem-pole output. The FAN7554 has various protection functions such as an over load protection, an over current protection, and the over voltage protection, which include built-in auto restart circuit. The FAN7554 is available in the 8-DIP package as well as the 8-SOP package.

Features

• Current Mode Control

• Pulse by Pulse Current Limiting

• Low External Components

• Under Voltage LockoutUVLO: 9V/15V

• Stand-by Current: Typ. 100uA

• Power Saving Mode Current: Typ. 200uA

• Operating Current: Typ. 7mA

• Soft Start

• On/Off Control

• Over Load ProtectionOLP

• Over Voltage ProtectionOVP

• Over Current ProtectionOCP

• Over Current LimitOCL

• Operating Frequency up to 500kHz

• 1A Totem-Pole Output Current