低壓恒流DC-DC驅(qū)動

MT7285是一款4.2V~40V寬輸入電壓范圍，白光LED恒流驅(qū)動芯片，MT7285可設(shè)置為降壓，升壓和升降壓型拓撲結(jié)構(gòu)?？稍贏C12V/DC12V的輸入電壓下達到20W的驅(qū)動能力。\n\nMT7285采用固定工作頻率，電流模式來調(diào)節(jié)LED電流，系統(tǒng)瞬態(tài)響應(yīng)快，環(huán)路穩(wěn)定，設(shè)計簡單。\n\nMT7285采用高位電流檢測技術(shù)，可以通過外部電阻設(shè)置LED的平均工作電流。200mV的低基準電壓有效地降低了功率損耗，提高了效率。450kHz固定工作頻率最大限度的減少了外部電感，輸入與輸出電容。\n\nMT7285通過單個控制引腳支持PWM調(diào)光和模擬調(diào)光。\n\n芯片內(nèi)部包括過壓保護（OVP）、過流保護 ? 輸入電壓范圍：4.2V~40V\n? 高達95%的效率\n? 逐周期過流保護\n? 外置MOS管驅(qū)動\n? 支持升壓，升降壓，降壓的拓撲結(jié)構(gòu)\n? LED過溫保護\n? 穩(wěn)定的低等效串聯(lián)電阻（ESR）陶瓷電容即可保證系統(tǒng)穩(wěn)定\n? 過溫保護和過壓保護\n? 過壓保護外部可調(diào)節(jié)\n? 固定450kHz工作頻率\n? 降低EMI的抖頻技術(shù)\n? 低反饋電壓：200mV\n? 可調(diào)節(jié)的軟啟動\n? 支持模擬調(diào)光和高達10kHz的PWM調(diào)光\n? ESOP8封裝;

Maxic

美芯晟

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

文件：190.24 Kbytes 頁數(shù)：1 Pages

MAXIC

美芯晟

9 watt; A19 Compact Fluorescent; 4100K; 82 CRI; Medium base; 120 volts

文件：124.54 Kbytes 頁數(shù)：1 Pages

SATCO

Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

This LSI is a single-chip RISC microprocessor that integrates a Renesas Technology original RISC CPU core with peripheral functions required for system configuration. The CPU in this LSI has a RISC-type (Reduced Instruction Set Computer) instruction set and use a superscalar architecture and a Har

文件：9.73943 Mbytes 頁數(shù)：1726 Pages

RENESAS

瑞薩

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 頁數(shù)：117 Pages

STMICROELECTRONICS

意法半導(dǎo)體