Increased VCM current resolution during track follow to decrease NRRO

A method of operating a data storage device, comprising:

• determining a current mode of operation of a voice coil motor (VCM) of the data storage device, wherein the VCM is configured to operate in a first mode and a second mode, the current mode of operation comprising the first mode, and wherein the VCM is configured to be driven using a VCM driver having a programmable transconductance (Gm);
• and
• transitioning the VCM from the current mode of operation to a new mode of operation, the new mode of operation comprising the second mode, wherein the transitioning comprises:
• tuning the Gm from a first transconductance value to a second transconductance value different from the first transconductance value by varying one or more of a first resistance, a second resistance, or a gain GS of a current sense amplifier (CSA) in the VCM driver.

One or more processing devices, comprising, individually or in combination:

• means for determining a current mode of operation of a voice coil motor (VCM) of a data storage device, wherein the VCM is configured to operate in a first mode and a second mode, the current mode of operation comprising the first mode, and wherein the VCM is configured to be driven using a VCM driver having a programmable transconductance (Gm);
• and
• means for transitioning the VCM from the current mode of operation to a new mode of operation, the new mode of operation comprising the second mode, wherein the means for transitioning comprises:
• means for tuning the Gm from a first transconductance value to a second transconductance value different from the first transconductance value by varying one or more of a first resistance, a second resistance, or a gain GS of a current sense amplifier (CSA) in the VCM driver.