• Ltc3115-2 design problem

    Hello, I am currently working on the ltc3115-2 and I am experiencing a design problem.

    My goal is to be able to provide a voltage of 24Vdc and a current of 2A; with an input voltage between 20-28Vdc.

    Currently, I have made my schematic as follows:

  • LTC3115-2 Protections

    Hello!

    We have a LTC3115-2 that has a nominal 28V input and a nominal 28V output. It should be noted that we are trying to power the converter into a 750uF output capacitance (the 9ms soft start time is nowhere near enough). For a while, we saw no issue…

  • LTC3115-2仿真

    您好,我使用LTspice XVII对LTC3115-2进行电路仿真,采用数据手册中推荐的参考电路方案,但仿出来的波形很奇怪,不知道问题出在哪里,请给予帮助和解答。谢谢!

  • Question about LTC3115-1 Type III Compensation Network

    Hi,

    What are the recommended values for RFB, CFB and CPOLE for the following specifications?

     VIN=5V to 30V, VOUT=12V, IOUT=1A max, fs=2MHz, L=10uF (ESR=17m ohm), COUT=47uF (ESR=8m ohm)

     

    If possible, please also provide the calculation formula. The explanation…

  • LTSpice small signal model as referenced in the LTC3115-2 datasheet

    Hi,

    The applications information section of the LTC3115-2 datasheet references use of a Bode plot generated in LTspice from the small signal parameters of the LTC3115-2.  Is the LTspice model available for customer use when calculating compensation loop…

  • LTC3115EDHD-2#PBF Output voltage Control

    Hi,

    We are using Buck Boost LTC3115EDHD-2#PBF for LCD backlight power supply. @Vin 16V to 33V. Vout of 28V, 285mA. 

    Our goal is to control the LCD Backlight brightness. So need to control the Feedback Voltage through the Processor PWM output pin. The current…

  • LTC3115EDHD-2#PBF Output voltage Control

    Hi,

    We are using Buck Boost LTC3115EDHD-2#PBF for LCD backlight power supply. @Vin 16V to 33V. Vout of 28V, 285mA. 

    Our goal is to control the LCD Backlight brightness. So need to control the Feedback Voltage through the Processor PWM output pin. The current…

  • LTC3115-1 questions on layout, bypassing

    Hello, 

    A couple of questions about the LTC3115-1, after noting that oscillations occur on either side of the switch depending on buck vs. boost mode: 

    1. Is this the reason that Layout recommendation is to put GND plane below and around the inductor – as…
  • LTC3115-1 have hiccup mode?

    Hi

    I'm a DFAE in Japan. Our customer evaluates LTC3115-1 and faces similar to hiccup mode (Vo is up and down)  when Vin=4V, Vo=12V and IO>200mA. The power supply design spec is Vin=4V~32V, Vo=12V and Io=300mA. It seems that the load current that…

  • LTC3115-1 Three questions about compensation, kelvin connection and optional schottky diode

    Dear Sir/Madam,

    After carefully read the datasheet of LTC3115-1, I have three questions:

    1. About the type iii compensation.

    In the Applications Information part, the datasheet says that a type III compensation network is desired (page 24, Fig. 9). However…