BeagleBone LCD7 Cape
System Reference Manual
Revision A3
Page 22 of 27
5.3
Power Management
5.3.1
LCD Power Supply
The main Power Management IC (PMIC) in the system is the TPS65105. This PMIC
offers a compact and small power supply solution that provides all three voltages
required by TFT LCD displays. TPS65105 also has an integrated VCOM buffer to power
the LCD backplane as well as a linear regulator controller to provide a 3.3V output for
system powered by 5V only. The enable (EN) input of the device is controlled by signal
LCD_AVDD_EN, which is exposed at expansion connector J1.
For more information about TPS65105, refer to
http://www.ti.com/product/tps65105
Figure 7 shows TPS65105 in the system.
Figure 7.
BeagleBone LCD7 Power Management IC
The main boost converter of TPS65105 operates with a fixed frequency of 1.6MHz and
provides the AVDD_10V power rail for the LCD interface. This output is also fed to SUP
