EVB-USB4x12 Evaluation Board User’s Guide
DS50002889A-page 18
2019 Microchip Technology Inc.
3.1.2
Power Source
The EVB-USB4x12 must be powered externally through the J1 4-Pin DIN connector,
or through the J5 terminal block.
The supported input voltage range for the base board is 12V to 24V. By default, the sup
-
plied PM-PD requires an input of 24V to properly regulate up to 20V volts to the
upstream PD ports. The recommend input voltage is 24V unless an alternate PM-PD
and/or a specialized hub firmware is used.
A power supply is not included with the EVB-USB4x12.
3.1.3
Board Power
The board includes LED indicators to indicate if all board power nets are working and
includes test loops for quick measurements. The location of these LEDs and test loops
are shown in
FIGURE 3-2:
BOARD POWER LEDS AND TEST LOOPS)
3.1.4
Reset
An on-board reset button (SW1) is included, and this resets the USB4712/USB4912
when pressed. A red LED indicator (D3) also illuminates when the reset signal is
asserted (active low). The locations of these components are shown in
below.
FIGURE 3-3:
RESET BUTTON LOCATION
3.3V
3.3V LED
GROUND
INDICATOR
D1
TEST
POINT
TP2
TEST
POINTS
TP1
TP5
TP6
RESET LED
RESET BUTTON
D3
SW1
