Figure 3-1 shows the switch node voltage waveforms of the channel 1 and channel 2 of the TPS92520EVM-133 dual channel BUCK LED driver. The switch node (SW1 and SW2) of the two channels that are completely independent of each other. SW1 and SW2 are not in phase and are not 180 degrees out of phase. The switching frequency, input voltage, and out LED current setpoints can also be set independently on each channel.

V_IN = 48 V, V_LED1 = 30 V, V_LED2 = 10 V

Figure 3-2 Dual-Channel Buck SW-Node Voltage