Search tips
Showing 12 results View by: Thread Post Sort by
    Answered

  • LM4991: Usage

    Resolved
    Part Number: LM4991 Tool/software: Hi Ti, Is there any problem with the following usage of LM4991? Supply voltage: 5V Maximum input signal amplitude: 5Vpp Maximum output signal amplitude: 6Vpp (Av=1.2) Best regards,
    • Resolved
    • Answered

  • LM4991: Feedback resistance

    Resolved
    Part Number: LM4991 Tool/software: Hi Ti, I am planning to use a digital potentiometer for the feedback resistor (RF) of the LM4991. I am thinking of using this to control the gain, but is this a problem? Best regards,
    • Resolved

  • LM4991: 3.0-W, mono, analog input Class-AB audio amplifier

    Part Number: LM4991 Other Parts Discussed in Thread: LM48511 Tool/software: We are using the LM4991LD/NOPB 3W power amplifier. We need a 5W amplifier. Please suggest which amplifier should be used
    • Answered

  • LM4991: Work well at Ri=3.9kohms, Rf=6.2kohms, RL(Speaker)=32ohms and VDD=5V?

    Resolved
    Part Number: LM4991 Other Parts Discussed in Thread: LM4818 Tool/software: Hello, My customer is considering to use one of LM4991MA/NOPB, LM4818MX/NOPB, LM4864M/NOPB, LM4862M/NOPB or LM4861M/NOPB. At the application circuits on the datasheet, they would…
    • Resolved

  • LM4991: looking for spice model

    TI Thinks Resolved
    Part Number: LM4991 Other Parts Discussed in Thread: TPA6211A1 Hi, I am looking for a spice model of LM4991, but I can't find anything! Anyone knows where to find it? Thanks, Roberto
    • Answered

  • LM4991: Characteristics above 20kHz

    Resolved
    Part Number: LM4991 Hi, My customer would like to use LM4991 at 25kHz. However the characteristics(frequency vs Gain, THD+N) shown on the datasheet is below 20kHz as following. (We're understanding that it is valid because LM4991 is audio amp) …
    • Resolved

  • LM4991: Timing issue with shutdown

    Part Number: LM4991 Hi, we have an issue with the LM4991. In our design the startup time is very important. We want to switch off the amp via the shutdown-pin between audio signals. 90 ms after we pull the shutdown to GND (to activate audio) the audio…
    • Answered

  • LM4991 THD+N & Stability Time

    Resolved
    Other Parts Discussed in Thread: LM4991 Hi, We have obtained sevral questions from our customers. When we increased the gain of the amplifier by changing a feedback resistor, the THD+N has increased. For example, the gain is 44 V/V, the THD+N is 0.7%. We think…
    • Resolved
    • Answered

  • RE: LM4871: Alternative for SSM2211SZ

    Resolved
    Shimada-san, Correct, additional option is LM4991. If Class-D is OK there are more alternatives like TPA2011D1. Best regards, - I van Salazar Applications Engineer
    • Answered

  • RE: TPA6211A2 simulation model

    Resolved
    Hi Roberto, I split your post into a new thread since this is no longer related to LM4991. I can take a look at the messages you've got, but it seems you tried this in LTSpice, are you having the same results on PSpice? Best regards, -Ivan Salazar …

Didn't find what you are looking for? Post a new question.