DC-DC转换电路

SD4938 是用于开关电源的内置150V 高压MOSFET的电流模式PWM控制器。SD4938 内置高压启动电路。在轻载下会进入打嗝模式，从而有效地降低系统的待机功耗。具有降频功能，进一步优化轻载条件下的转换效率。具有软启动功能，能够减小器件的应力，防止变压器饱和。SD4938内部还集成了各种异常状态的保护功能，包括：VDD欠压保护，VDD过压保护，前沿消隐，输出过载保护，过流保护，过温保护等。触发保护后，电路会不断自动重启，直到系统正常为止。 • 20V至150V输入电压 \n• 12V，15V，18V输出电压三档可调\n• 0.5A输出电流\n• 高压启动\n• 轻载打嗝\n• 降频\n• 软启动\n• VDD欠压保护\n• VDD过压保护\n• 前沿消隐\n• 输出过载保护\n• 过流保护\n• 过温保护 ;

Silan

士兰微

150V电流模式PWM控制器

    SD4938S是用于开关电源的内置150V 高压MOSFET的电流模式PWM控制器。在轻载下会进入打嗝模式，从而有效地降低系统的待机功耗。\n\n     SD4938S具有高压启动、自供电、降频、软启动等功能，内部还集成了各种异常状态的保护功能，包括：VDD欠压保护，VDD过压保护，输出过载保护，输出短路保护，过温保护等。触发保护后，电路会自动重启，直到系统正常为止。\n\n \n\n • 20V至150V输入电压\n• 0.5A输出电流\n• 轻载打嗝\n• 软启动\n• VDD过压保护\n• 过流保护\n• 过温保护\n;

Silan

士兰微

64-Bit TX System RISC TX49 Family

文件：4.03252 Mbytes 页数：716 Pages

TOSHIBA

东芝

ADVANCED VOLTAGE REGULATOR

DESCRIPTION The L4938E/ED/EPD is a monolithic integrated dual voltage regulator with two very low dropout outputs and additional functions as power-on reset and input voltage sense. It is designed for supplying the microcomputer controlled systems especially in automotiveapplications. ■ ENABLE A

文件：101.81 Kbytes 页数：12 Pages

STMICROELECTRONICS

意法半导体

DUAL MULTIFUNCTION VOLTAGE REGULATOR

DESCRIPTION The L4938N is a monolithic integrated dual voltage regulators with two very low dropout outputs and additional functions such as power-on reset and input voltage sense. They are designed for supplying microcomputer controlled systems specially in automotive applications. ■ STANDBY OU

文件：93.68 Kbytes 页数：12 Pages

STMICROELECTRONICS

意法半导体

Surge Clamping, Transient Overvoltage Suppressor Unidirectional

Description: The NTE4900 series of silicon Transient Suppressors designed to protect voltage sensitive components from high energy voltage transients. Transient over voltage suppressor devices have become very important as a consequence of their high surge capability, extremely fast response time

文件：26.04 Kbytes 页数：2 Pages

NTE