Using the DS4412 to Margin the

Conclusion

The resistive-feedback-divider network and the current-sinking/sourcing capabilities of the DS4412 DACs control the margin of V_OUT of a DC-DC converter. The relationship between the full-scale current, I_FS, to the margin on V_OUT is determined by the value of the resistor R_A. By choosing the correct I_FS value for your application, you can determine the correct resistor values for the feedback divider network, and achieve the desired margin on V_OUT.