• LTC4442按数据手册典型电路使用时总是发热烧毁

    我们在医疗器械的开发中,采用LTC4442来驱动功率对管,产生较高的电压和功率,目的是激励压电陶瓷晶片产生超声波。样板电路和LTC4442数据手册中的Synchronous Buck Converter Driver这张图(如下)完全一致,其中Vcc=5V,Vlogic=3.3V,Vin=24V,输入PWM为3.3V、1MHz方波,功率对管为SiR462DP,输出电感2.2μH,电容10nF。当然,我们的目的并不是用于DC-DC转换,而是希望把功率对管的输出电压经电感电容支路谐振放大,在电容上产…

  • RE: LTC7004 - suitable for inverting buck-boost converter in DCM?

    Hi

    I think it has to do with boost capacitor doesn't get refreshed from VCC voltage since TS/Source node doesn't stay close to ground with the inductor oscillation.  This is the switching nature of DCM.  After multiple switching cycles, boost capacitor…

  • Inquiry about 6.78MHz operation for wireless power transfer

    Dear Engineer,

    I purchased the LTC4442 for a wireless power transmission experiment with a frequency of 6.78MHz. In particular, I am using the LTC442 to drive the TX power switch. The LTC4442 works well at frequencies below 500kHz but does not operate…