Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator

DESCRIPTION The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices. The SP6649 combines the high delivery associated

Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator

Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator

DESCRIPTION The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices. The SP6649 combines the high delivery associated

Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator

DESCRIPTION The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices. The SP6649 combines the high delivery associated

Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator

DESCRIPTION The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices. The SP6649 combines the high delivery associated

高性能、低功耗开关电源控制芯片

SP6649HF是一颗电流模式PWM控制芯片，内置650V高压功率MOSFET，应用于功率在30W以内的方案。SP6649HF在PWM模式下工作于固定开关频率，这个频率是由内部精确设定。在空载或者轻载时，工作频率由IC内部调整。芯片可以工作在绿色模式，以此来减小轻载时的损耗，提高整机的工作效率。SP6649HF在启动和工作时只需要很小的电流，可以在启动电路中使用一个很大的电阻，以此来进一步减小待机时的功耗。芯片内置有斜坡补偿电路，当电路工作于大占空比时，避免次谐波振荡的发生，改善系统的稳定性。内置有前沿消隐时（Leading-edge blanking time），消除缓冲网络中的二极管反向恢 • 全电压范围（90Vac-265Vac）输入时待机功耗小于75mW\n• 内置650V高压功率管\n• 4ms软启动用来减少MOSFET上Vds的应力\n• 抖频功能，改善EMI性能\n• 跳频模式，改善轻载效率，减小待机功耗\n• 无噪声工作\n• 固定65KHz开关频率\n• 内置同步斜坡补偿\n• 低启动电流，低工作电流\n• 内置前沿消隐(LEB)功能\n• 过载保护（OLP），逐周期限流保护（OCP）\n• VDD过压保护（VDD OVP），欠压保护（UVLO），VDD电压箝位\n• 过温保护（OTP）\n• SOP8无铅封装;

145째C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms

General Description The MAX6646/MAX6647/MAX6649 are precise, two channel digital temperature sensors. The devices accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typ

145째C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms

General Description The MAX6646/MAX6647/MAX6649 are precise, two channel digital temperature sensors. The devices accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typ