低压恒流DC-DC驱动

MT7285是一款4.2V~40V宽输入电压范围，白光LED恒流驱动芯片，MT7285可设置为降压，升压和升降压型拓扑结构。可在AC12V/DC12V的输入电压下达到20W的驱动能力。\n\nMT7285采用固定工作频率，电流模式来调节LED电流，系统瞬态响应快，环路稳定，设计简单。\n\nMT7285采用高位电流检测技术，可以通过外部电阻设置LED的平均工作电流。200mV的低基准电压有效地降低了功率损耗，提高了效率。450kHz固定工作频率最大限度的减少了外部电感，输入与输出电容。\n\nMT7285通过单个控制引脚支持PWM调光和模拟调光。\n\n芯片内部包括过压保护（OVP）、过流保护 • 输入电压范围：4.2V~40V\n• 高达95%的效率\n• 逐周期过流保护\n• 外置MOS管驱动\n• 支持升压，升降压，降压的拓扑结构\n• LED过温保护\n• 稳定的低等效串联电阻（ESR）陶瓷电容即可保证系统稳定\n• 过温保护和过压保护\n• 过压保护外部可调节\n• 固定450kHz工作频率\n• 降低EMI的抖频技术\n• 低反馈电压：200mV\n• 可调节的软启动\n• 支持模拟调光和高达10kHz的PWM调光\n• ESOP8封装;

Maxic

美芯晟

Boost/Buck-Boost/Buck White LED Driver With High Frequency PWM Dimming

文件：190.24 Kbytes 页数：1 Pages

MAXIC

美芯晟

8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES

GENERAL DESCRIPTION INTRODUCTION The ST7285C HCMOS Microcontroller Unit is a member of the ST7 family of Microcontrollers dedicated to car radio applications with RDS capability. The device is based on an industry-standard 8-bit core and features an enhanced instruction set. ■ 4.5V to 5.5V Supp

文件：748.17 Kbytes 页数：117 Pages

STMICROELECTRONICS

意法半导体

STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER

DESCRIPTION The TDA7285 is a monolithic integrated circuit designed for the portable players market and as sembled in a plastic DIP20 and SO20. The internal functions are: preamplifier, DC volume control, headphone driver and motor speed controller. WIDE OPERATING SUPPLY VOLTAGE (1.8V to 6

文件：154.5 Kbytes 页数：11 Pages

STMICROELECTRONICS

意法半导体

STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER

DESCRIPTION The TDA7285 is a monolithic integrated circuit designed for the portable players market and as sembled in a plastic DIP20 and SO20. The internal functions are: preamplifier, DC volume control, headphone driver and motor speed controller. WIDE OPERATING SUPPLY VOLTAGE (1.8V to 6

文件：154.5 Kbytes 页数：11 Pages

STMICROELECTRONICS

意法半导体