SLUUCQ0A may 2023 – june 2023 TPS922052 , TPS922053 , TPS922054 , TPS922055
5.7 Flexible Dimming Performance
Figure 5-14, Figure 5-15 and Figure 5-16 show the flexible dimming waveforms at different ADIM/HD pin and PWM/EN pin input duty cycles. Input voltage is 48 V, with 7 white LEDs in series used as load. The full-scale LED current is set at 4 A. The frequency of the input PWM signal at the ADIM/HD pin and PWM/EN pin is 20 kHz.
Figure 5-14 Waveforms at 50% Duty Cycle ADIM/HD and 50% Duty Cycle PWM/EN
Figure 5-15 Waveforms at 10% Duty Cycle ADIM/HD and 90% Duty Cycle PWM/EN
Figure 5-16 Waveforms at 90% Duty Cycle ADIM/HD and 10% Duty Cycle PWM/EN