The pulse isn’t 10Mhz- that’s the internal clock frequency (typical) of the IC. It’s a weird IC and datasheet, actually, and proved pretty opaque to my understanding. Fortunately we’re not alone since someone has already asked on the manufacturer forums for clarification of the output frequency; https://e2e.ti.com/support/power_management/led_driver/f/192/t/335798
Once you know what you’re looking for, the datasheet (http://www.ti.com/lit/ds/sbvs181/sbvs181.pdf) is a little less opaque:
The PWM operation for all color groups is controlled by a 16-bit grayscale (GS) counter. The GS counter
increments on each rising or falling edge of the external or internal GS reference clock that is selected by
OUTTMG (bit 217) and EXTGCK (bit 216) in the data latch. When the external GS clock is selected, the GS
counter uses the SCKI clock as the grayscale clock.
As the manufacturer states, the frequency is the length of time it takes the clock (which varies) to run the internal counter from 0 to 65535. AKA: Clock Frequency / 65536:
10000000 / 65536 = 152.58
Which is 152Hz… okay…
But then it goes a bit off the rails again with the Enhanced Spectrum stuff:
Enhanced spectrum (ES) PWM has the total display period divided into 128 display segments. The total display period refers the period between the first grayscale clock input to the 65536th grayscale clock input after BLANK (bit 213) is set to ‘0’. Each display period has 512 grayscale values, maximum. Each output on-time changes depending on the grayscale data.
At this point, I’m not really sure what the implications are, but it suggests an output frequency of ~20Khz (152Hz * 128).
Bear in mind the tlc59711 is open-drain, designed to sit between your load, and Ground such that it cannot supply power (a.k.a. source current). Keep this in mind when wiring it to a SSR.
So uh… yeah TLDR: it’s either 152Hz or 20Khz.