CS2841B中文资料Automotive Current Mode PWM Controller数据手册ONSEMI规格书

描述 Description

The CS2841B provides all the necessary features to implement off-line fixed frequency current-mode control with a minimum number of external components.

The CS2841B (a variation of the CS-2843A) is designed specifically for use in automotive operation. The low start threshold voltage of 8.0V (typ), and the ability to survive 40V automotive load dump transients are important for automotive subsystem designs. The CS-2841 series has a history of quality and reliability in automotive applications.

The CS2841B incorporates a precision temperature-controlled oscillator with an internally trimmed discharge current to minimize variations in frequency. Duty-cycles greater than 50% are also possible. On board logic ensures that VREF is stabilized before the output stage is enabled. Ion implant resistors provide tighter control of under-voltage lockout.

特性 Features

• Optimized for Off-line Control
• Maximum Duty-cycle Clamp
• Low Start-up Current
• Improved Undervoltage Lockout
• 1% Trimmed Bandgap Reference
• Pb-Free Packages are Available

简介

CS2841B属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由ONSEMI制造生产的CS2841BDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。