Hello, I am going to use LTC3805-5 as the controlling circuit of a flyback converter.

Firstly, I built a small circuit to get some knowledge of the chip. The schematic is shown below:

The components in the shadow are not installed on the pcb. It is…

Hi，

我在使用LTC3805-5设计flyback converter时，发现通电后LTC3805-5的GATE引脚没有输出驱动信号。VCC和RUN上有电压，都是5V；FS引脚上没有看到任何波形。

电路图如下：

请问应该测量哪些引脚以判断该芯片是否正常工作？这些引脚上的波形大致是什么样的？

另外，该芯片的GND引脚位于封装背面，请问如何手工焊接？焊接时需要注意什么？

I have the following circuit.

The components with cross over them are not installed on the board.

I have made two boards and made a few measurement of the boards separately. Here is the result.

Hello everybody,

I'm working on a boost converter, used to boost a 400V input voltage up to 550V.

The circuit is build around the LTC3805 but I figure out mainly a startup problem: after the controller issues 4-5 pulses, it stop to work. After some…

Hi All,

I'm using the LTC3805 flyback in a configuration with feedback through an opto similar to the "typical application" on page 17 of the datasheet:

However, I run the system at very light loads sometimes and I am wondering what the…

Hello People,

I'm using a LTC3805 in a sepic design and I have some questions regarding the sync input.

I have a Vin of 19V to 24V, Vout of 20V and -20V at Iout(max) of 260mA and -200mA. I use two coupled inductors of 330uH and the sense resistor…

can you suggest any way to produce +-5 from +5.
I need it for one 4ch differential signal summer op-amp plus salen-key filter op-amp.

Is there any DC/DC converter or something in ADI that doing this?

Hello,

Do the transient thermal curves of part# LTC1693-5 allow its output to quickly charge a capacitor as depicted here? Less than several microsec charge time is desired. The datasheet lists Rth of 200 C/W, which suggests this is not possible, but…