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…
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
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)
…
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…
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…
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
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 …
Hi Hong Tay,
You can have a look the following devices: TPA6211A1, LM4991 and LM4871. These devices are Class AB amplifiers and handle higher power than LM4890.
Best Regards
José Luis Figueroa
Audio Applications Engineer
Other Parts Discussed in Thread: LM4838 , LM4991 , TPA6211A1
Hi Team,
Did we have similar part to replace APA2071?
http://www.anpec.com.tw/ashx_prod_file.ashx?prod_id=615&file_path=20150925111326674.pdf&original_name=APA2071.pdf
Thank…