Texas Instruments AMC7812 Performance Demonstration Kit AMC7812EVM-PDK AMC7812EVM-PDK 데이터 시트
제품 코드
AMC7812EVM-PDK
Power-Supply Interface
4.3
AMC7812EVM-PDK Operation Power
When the AMC7812EVM PCB is used as a daughterboard, power can be supplied from the connector to
the motherboard through the power-supply connector, J5. Refer to
the motherboard through the power-supply connector, J5. Refer to
.
The AMC7812EVM-PDK includes a USB-MODEVM board as the motherboard, which provides power to
the AMC7812EVM board through connector J5.
the AMC7812EVM board through connector J5.
Power to the motherboard USB-MODEVM board can be supplied from one of the following different
sources:
sources:
•
Through a USB connection
•
6.0-VDC to 10.0-VDC ac/dc external wall supply (not included)
•
Laboratory power supplies
Each power-supply voltage has an LED (D1 to D7) that lights when the respective power supply is active.
When powered from the USB connection, JMP6 (on the USB-MODEVM PCB) should have a shunt from
pins 1-2 (the factory default configuration). When powered from 6 VDC to 10 VDC, either through the J8
terminal block or J9 barrel jack, JMP6 should have a shunt installed on pins 2-3.
pins 1-2 (the factory default configuration). When powered from 6 VDC to 10 VDC, either through the J8
terminal block or J9 barrel jack, JMP6 should have a shunt installed on pins 2-3.
If power is applied in any of these ways, onboard regulators generate the required supply voltages, and no
further power supplies are necessary.
further power supplies are necessary.
If laboratory supplies are used to provide the individual voltages required by the USB-MODEVM interface
board, JMP6 should have no shunt installed. Voltages are then applied to J2 (+5 VA), J3 (+5 VD), J4
(+1.8 VD), and J5 (+3.3 VD). The +1.8 VD and +3.3 VD also can be generated on the board, from the +5-
VD supply, by the onboard regulators; to enable this supply, the switches on SW1 must be set to enable
the regulators. Move the switches to the On position (lower position, looking at the board with text reading
right-side up) to enable the regulators. If +1.8 VD and +3.3 VD are supplied externally, disable the
onboard regulators by placing the SW1 switches in the Off position.
board, JMP6 should have no shunt installed. Voltages are then applied to J2 (+5 VA), J3 (+5 VD), J4
(+1.8 VD), and J5 (+3.3 VD). The +1.8 VD and +3.3 VD also can be generated on the board, from the +5-
VD supply, by the onboard regulators; to enable this supply, the switches on SW1 must be set to enable
the regulators. Move the switches to the On position (lower position, looking at the board with text reading
right-side up) to enable the regulators. If +1.8 VD and +3.3 VD are supplied externally, disable the
onboard regulators by placing the SW1 switches in the Off position.
An IOVDD power supply matches the power voltage level with external digital devices that interface with
the USB-MODEVM board. An onboard switch, SW3, can set the IOVDD voltage to be 1.2 V, 1.4 V, 1.6 V,
1.8 V, 2.0 V, 2.5 V, 3.0 V, or 3.3 V.
the USB-MODEVM board. An onboard switch, SW3, can set the IOVDD voltage to be 1.2 V, 1.4 V, 1.6 V,
1.8 V, 2.0 V, 2.5 V, 3.0 V, or 3.3 V.
8
AMC7812EVM-PDK User’s Guide
SBAU177A – September 2010 – Revised May 2013
Copyright © 2010–2013, Texas Instruments Incorporated