User manual

LCD Board - User’s Guide

Page 8

Figure 1 – LCD Board Mounting Options

3.3 Power Consumption

Different LCD Boards have different power consumption. The subsections below list the different LCD

boards’ current consumption. The number given is the combined current consumption of the +3.3V and

+5.0V supplies. It is the current consumption that is needed from an external +5V supply (when

connected to the OEM Base board).

3.3.1 Power consumption of 4.3 inch LCD (EA-LCD-004)

When using the 4.3 inch LCD together with the LPC1788 Developer’s Kit (LPC1788 OEM board plus

OEM Base board) the current consumption on the +5V (external or USB powering) is about 480 mA.

Note that this is close to the limits of many USB Host ports. Therefore an external power supply might

be needed. A +5V, 2A external power supply is recommended since it then can be used for other LCD

boards also.

3.3.2 Power consumption of 7.0 inch LCD (EA-LCD-006)

When using the 7.0 inch LCD together with the LPC1788 Developer’s Kit (LPC1788 OEM board plus

OEM Base board) the current consumption on the +5V (external or USB powering) is about 1400 mA.

Note that this is way more than a USB Host port can supply. Therefore an external power supply is

needed. A +5V, 2A external power supply is recommended.

3.4 Usage - Evaluation

Note that the LCD Board has not been designed for integration into an end-product. It is for evaluation

and prototyping.