8.2.1.1 Design Requirements

The procedure for calculating the external components is illustrated with Figure 14. Only the values for the 5-V output are calculated because the procedure is the same for the 10-V output. The circuit shown in Figure 14 is configured for the following specifications:

• CH1 output voltage, V_OUT1 = 10 V
• CH2 output voltage, V_OUT2 = 5 V
• CH1 maximum load current, I_OUT1 = 4 A
• CH2 maximum load current, I_OUT2 = 8 A
• Minimum input voltage, V_IN(min) = 14 V
• Maximum input voltage, V_IN(max) = 55 V
• Switching frequency, f_SW = 230 kHz

Some component values were chosen as a compromise between the 10-V and 5-V outputs to allow identical components to be used on both outputs. This design can be reconfigured in a dual-channel interleaved configuration with a single 10-V output which requires identical power channels.