• LTC3780+AD5174

    Hello! I make a charger for assembling 6S using LTC3780 and MCU STM32. To change the output voltage of the LTC3780, I use a digital rheostat AD5174. Part of the circuit with LTC3780 and AD5174 attached. In this form, this circuit does not work: the output…

  • LTC3780 lifecycle

    Hi, I want to double check that if LTC3780 lifecycle status, our new design will be released in 2022, and lifecyle is 8 years, is LTC3780 capable of supporting on this?

  • LTC3780输入过流

    本人最近做LTC3780的一个案子,28V输出,19V输出的,之前做的时候,负载能达到5,6A都没问题,效率能达到98%左右,而这次低压的时候最多能带3A(19V),负载电流超过3A后,把输入电压拉很低,输入电流很大,然后MOS就发烫,无法恢复正常,不知道啥原因,一些参数都差不多了,不知道各位有没有遇到类似的情况。

  • LTC3780 erratic operation

      I'm using a LTC3780 as a buck/boost 5V regulator.  I'm having some problems with the regulator doing some odd things if the input voltage is above approx 18V and the load on the device is increased

      The images show the high side FET drive (blue…

  • LTC3780烧了是什么现象

    我怎么才能知道我的LTC3780是否烧了

  • LTC3780 as a current source for driving LED

    Hi,

    I am trying to utilize LTC3780 as a current source for the LED (2V x 5A). Unfortunately, at the startup I see a huge voltage and current spike (attached), which blows up the LED instantly. Is there any way to adjust slow startup (SS pin) feature to…

  • How to calculate LTC3780, LTC3789 Ith Pin filter?

    Hello,

    Could someone be so kind as to explain how the RC filter is derived for the Ith Pin?  One example shows an 8k and 2200pF, and another example has a 15k and a 10nF.  Then a third example has a 68k and 3300pf.  The datasheet explains it is a current…

  • 请教,ltc3780,接阻性负载可以实现恒流输出,输出接锂电池,则恒流功能失效。

    电路参考淘宝买的一个Ltc3780模块,可以实现恒流控制,是这么实现恒流控制的:

    输出回路上有个电流采样电阻,这个电阻两端的电压,经过运放放大后,再经过一个二极管,连接到Ltc3780的6脚VOSENSE+这个管脚,这个管脚的电压一旦超过0.86V,则会引起Ltc3780的输出过压保护功能,从而实现输出恒流控制。

    经测试,输出接纯阻性负载时,可以实现恒流输出,虽然不太稳。但基本满足要求。

    但输出接锂电池时,则恒流功能就失效了,无论输入还是输出电流很大。我量了下6脚电压,已经是3V多了。

  • RE: Want proper part with design

    Hi Yogesh 

    Please download LTpowerCAD and  LTpowerCAD file for LT3780. After downloading the files, run the program and input your parameters to get the suggested ref design and parts.

    http://www.analog.com/en/products/ltc3780.html#product-tools

    http:…

  • RE: BUCK-BOOST

    One of 4 mosfets always opened in BUCK, other in BOOST. You may use Buck-Boost controller with external mosfets like LTC3780 to control it state. Also you may compare input and output voltage: if Vin>Vout - Buck else - Boost.