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  • UC3845: Required Inductor design for DC-DC Buck Converter

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: Dear TI Expert, We are designing dc -dc buck converter using UC3845. Please help to design inductor for the following parameters. 1. Input Voltage Range - 30 to 72 Vdc. 2. NO load Output Voltage - 13.80Vdc 3. Output…

  • UC3845: Inquire about the impact of UC3845's flyback switching power supply, RCD absorption circuit of MOS transistor on EMC, and how to calculate the RCD value? What is the function of the capacitor between pin 3 and pin 4?

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: How to calculate the value of C11 in Figure 1 when using UC3845 as a flyback switching power supply? What is the function of C11? In addition, what are the effects of R, C, and D on EMC in Q1's RCD absorption circuit…

  • UC3845: Does UC3845 has any AEC-Q qualification or Enhanced product (EP)

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: Hello Ti Team, Does UC3845 controller has any AEC-Q qualification or Enhanced product (EP) can you please check and let me know Thanks, Karthik

  • UC3845: uc3845

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: Let me know, does TI make UC3845 (Current-Mode PWM Controller) has soft start functionality?
    • Answered

  • UC3845: Reference Design for non isolated buck converter

    Resolved
    Part Number: UC3845 Tool/software: Hi, I'm looking to design a DC/DC buck converter that takes 30V to 100vV input and steps it down to 12V, 12A output. Are there any reference designs or application notes I can leverage from? Regards, Logesh K
    • Resolved

  • UC3845: Vref output voltage abnormal

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: Hi expert, Pls see below schematic. After place C30 in VREF pin, Vref output voltage will be probabilistic anomalies. After delete C30, Vref output fault voltage cannot be reproduced. The first waveform is normal Vref…

  • UC3845: Vref output abnormal voltage

    TI Thinks Resolved
    Part Number: UC3845 Tool/software: Hi expert, Pls see below schematic. After place C30 in VREF pin, Vref output voltage will be probabilistic anomalies. After delete C30, Vref output fault voltage cannot be reproduced. The first waveform is normal Vref…
    • Answered

  • UC3845: UC3845 IC TEMPERATURE

    Resolved
    Part Number: UC3845 Hello, I am using UC3845 PWM IC for flyback topology for 24v5 amps Output .Here I noticed while continuous current of 4amps @24V IC getting heat, around 80 degree centigrade. Input Voltage :40VDC Output Voltage 24V @ 5AMPS. Vcc Start…
    • Resolved

  • UC3845: Higher Driver Strength Device Replacement

    TI Thinks Resolved
    Part Number: UC3845 Other Parts Discussed in Thread: UCC25800 Tool/software: Hi Team, Do we have other higher driver strength device like UC3845? Customer uses UC3845 driving isolation transformer to drive post-stage MOS, now the MOS is paralleled, so…
    • Answered

  • TL431: Calculation of cathode output voltage for TL431 and PWM output frequency calculation for UC3845

    Resolved
    Part Number: TL431 Other Parts Discussed in Thread: UC3845 Tool/software: The problem is as follows: 1.How is the cathode voltage of TL431 calculated in the attachment? 2.What is the minimum output voltage of TL431 cathode? 3.What is the formula for calculating…
    • Resolved

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