SLUUCT0A may 2023 – june 2023 TPS923652 , TPS923653 , TPS923654 , TPS923655
Figure 5-4 shows the LED current deviation vs. the number of LEDs in series in analog dimming mode. Input voltage VIN is set at 24 V. LED current is set at 0.5 A and 2 A with analog dimming. White LEDs are used as load. The number of LEDs in series is 10, 11, 12, 13, 14, 15, and 16, respectively. The frequency of the input PWM signal at the ADIM/HD pin is 20 kHz.
Figure 5-6 shows the LED current deviation vs. the number of LEDs in series in PWM dimming mode. Input voltage VIN is set at 24 V. LED current is set at 0.5 A and 2 A with PWM dimming. White LEDs are used as load. The number of LEDs in series is 10, 11, 12, 13, 14, 15, and 16, respectively. The frequency of the input PWM signal at the PWM/EN pin is 20 kHz.