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LM10011 Control and Design Software

9.2 Select VID Operating Mode

When the user first starts the GUI, the software assumes the LM10011 evaluation board is in 6-Bit mode.

The software and hardware must both be operating in the same mode for the GUI to properly

communicate to the evaluation board. The evaluation board has a "MODE" jumper that must be set to the

correct mode before powering the board. The software has a "Select VID Operating Mode" section,

Figure 8, with a listbox giving the user the option to select between 4-Bit communication and 6-Bit

communication.

Figure 8. Select VID Operating Mode Section

9.3 Initial Setup

The Initial Setup section, Figure 9, allows the user to enter the design inputs based on the application

requirements of the VID enabled POL. The default values in this section represent the values used on the

evaluation module.

The inputs include any box with spin buttons (indicated by up and down arrows) . Boxes without spin

buttons are design outputs.

When starting a design, the user must input the nominal feedback voltage of the POL in use in the VFB

POL box. In the case of the LM21215A-1, this is 0.600V. The desired maximum and minimum output

voltage is entered into the VOUT MAX and VOUT MIN boxes respectively. Doing this sets the effective

VID range were each step resolution is defined in the VOUT Resolution box. To set a nominal start-up

voltage, select an IDAC_OUT current from the available currents in the IDAC at Startup list box. The Vout

at Start-up box will display what the corresponding start-up voltage is.

Figure 9. Initial Setup (Theoretical) Section

SNOU108A–December 2012–Revised April 2013 LM10011 Evaluation Module

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