The board is equipped with the Freescale MMPF3000. The PF3000 is a Power Management Integrated Circuit (PMIC) designed specifically for use with the Freescale i.MX 7 and i.MX 6SL/SX/UL application processors. With up to four buck converters, six linear regulators, RTC supply, and coin-cell charger, the PF3000 can provide power for a complete system, including applications processors, memory, and system peripherals. This device is powered by SMARTMOS technology.
To be fully functional, the board needs a 5V clean power (VCC_SW). If an LVDS panel is connected, the board must be powered at 12V. We can power the board with an external power supply or with a microUSB cable connected to a 5V source.
Power supply stages
- The (E) block allows to only one wire to arrive at VCC_SW node. this block is controlled by to signals: 5V_PWRG and the output of (D) block.
- 5V_PWRG is a signal that notify the voltage coming from the (A) block has the right value and eventually the VCC_SW_IN can be used to power the board.
- The (A) block is a DC/DC converter to a 5V voltage.
- The (B) block is the uUSB port.
- The (D) block detect witch power supply is connected and eventually send signals to switch the source for VCC_SW
- The (F) block is another DC/DC converter from 5V to 3.3V.
You can power up the board in 3 ways
- DC-jack with a standard 5.5mm/2.1mm barrel jack: internal positive, Voltage 6 to 15.
- microUsb: 5 Volts up to 2 Ampere
- Vin / GND pin on internal pinout: from 5V to 12V, min 2A. (If you are having problems powering the board with 5V, there may be a problem of leakage from the power supply. Try with a higher voltage e.g. 6V).
Providing higher voltages could damage the board!