TPS929121-Q1 has 12 channels of high-side current sources. Each channel has its own enable configuration register CONF_ENCHx. Setting CONF_ENCHx to 1 enables the channel output; clearing the register to 0 disables the channel output. To completely turn off the channel current, user can clear channel enable bit CONF_ENCHx to 0. Upon power up, CONF_ENCHx is automatically reset to 0 to avoid unwanted blinking.

Each OUTx channel supports individual 64-step programmable current setting, also known as dot correction (DC). The DC feature can be used to set binning values for output LEDs or to calibrate the LEDs to achieve high brightness homogeneity based on external visual system to further save binning cost. The 6-bit register CONF_IOUTx sets the current independently, where x is the channel number from 0 to 11. The OUTx current can be calculated with Equation 2.

Equation 2.

where

• CONF_IOUTx is programmable from 0 to 63.
• x is from 0 to 11 for different output channel.
• I_{(FULL_RANGE)} can be calculated with Equation 1.