Other Parts Discussed in Thread: TPS92380, TPS61169,
Hi,
When I see the datasheet of TPS92360 or TPS61169, I found >5kHz is recommended at PWM dimming signal frequency. Seeing TPS92380, which is similar part number with TPS92360, however, 100Hz is min Fpwm.
Why does TPS92360 require such a high frequency?
There is a description at 7.3.5 of the datasheet of TPS92360. If just for optimum performance, are the customer able to use below 5kHz? Any concern if they use with100Hz PWM dimming?
For optimum performance, use the PWM dimming frequency in the range of 5 kHz to 100 kHz. If the PWM frequency is lower than 5 kHz, it is out of the low pass filter's filter range, the FB regulation voltage ripple becomes large, causing large output ripple and may generate audible noise.
Best regards,
Hideki