SLUUCT0A may 2023 – june 2023 TPS923652 , TPS923653 , TPS923654 , TPS923655
Figure 5-14, Figure 5-15, and Figure 5-16 show the PWM dimming waveforms at 10%, 50%, and 90% duty cycles, respectively. Input voltage is 24 V, with 15 white LEDs in series used as load. The full-scale LED current is set at 2 A. The frequency of the input PWM signal at the PWM/EN pin is 20 kHz.
Figure 5-13 gives the test result of linearity of PWM dimming, in comparison with the theoretical value. Input voltage is 24 V, with 16 white LEDs in series used as load. The full-scale LED current is set at 2 A. The frequency of the input PWM signal at the PWM/EN pin is 20 kHz.