User's Manual
Table Of Contents
- 1 Document information
- 2 Hardware design block diagram
- 3 Power Consumption
- 4 Hardware capabilities
- 5 Connector datasheet
- 6 PCB production information
Page:7
Figure 6 DCDC:12V to +5V Circuit Diagram
4.2.2 PMU:VCC_SYS(5V) generates a variety of power supplies
through the PMU chip
The ACT8846QM490-T is a power management chip (PMU) with inputs of VCC_SYS that generate
multiple different voltages to supply to the board. There are four DCDCsand nine LDOs.
OUT1~OUT4 is the DCDC output,OUT5~OUT13 is the LDO output, and the OUT1 output voltage is
adjustable.
Table 5 PMU Input Features Functional Table
Functional classes Feature description illustrate
1 Input properties The system input voltage is 3.0V-5.5V,normal operation Yes
2 Input properties Input Ripple + Noise <3%
Table 6 PMU(DCDC) Output Features Functional Table
DCDC output OUT1 OUT2 OUT3 OUT4
1 Output voltage 1.5V 3.3V 1.0V 2.0V
Corresponding voltage VCC_DDR VCC_IO VCC_LOG VCC_20
2 Load current 1.5A 2.8A 1.5A
3 Output ripple + noise 3%
4 Switching frequency 2.25MHz
5 other Voltage adjustable / / /