Power Supply; Table 1. Voltages Present On Board - ST EVALCOMMBOARD Manual

UM0240
2

Power supply

Board components require the following voltage supplies.
Table 1.
Function
Main Power
Supply
MCU Flash
Programming
OpAmp negative
supply
These supplies are all derived from an input power supply that can be taken from four
different sources:
1. PLM 10V: connected to the 10V line of the PLM connector
2. 5V Motor: connected to the 5V line of the Motor connector
3. Phone Jack: external connector, compatible with common notebook power supply
connectors, bringing power supply in the 5V÷ 35V range
4. USB 5V: connected to the 5V line of the USB supply
This enhanced flexibility of source and source voltage selection coexists due to diodes D7,
D8, D10 and D12, which prevent the reverse current flowing in the supply inputs, keeping
different sources independent.
The higher voltage input will be the dominant supply.
LED D11 is turned on when the power supply is active.
Voltages present on board
Supply Converter
Switching
VDD Converter
(Buck)
Regulated
VPP Charge Pump
Converter
Non regulated
-5V
Charge Pump
Device Input Range
L5973D
ST662A (pin VOUT)
ST662A (pin C1-)
Power supply
Output Value
5V ÷ 35V 5V
Vdd 12V
Vdd -5
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