Board Interface Description
2020 Microchip Technology Inc. DS50002927A-page 23
TABLE 2-13: BOARD TEST POINTS
Test Point # Signal Description
Power Supply Inputs and Outputs
TP1 VDC Input DC Power Supply
TP3 +12V +12V Supply – output of on-board MIC28511 device-based
buck converter
TP7 PGND Power Ground
TP22 PGND Power Ground
TP4 +5V +5V Supply – output of on-board MCP16301 device-based buck converter
TP5 +3.3V +3.3V Digital Supply – output of on-board +3.3V LDO (MCP1826)
TP8 DGND Digital Ground
TP18 DGND Digital Ground
TP19 DGND Digital Ground
TP6 +3.3VA +3.3V Analog Supply
TP9 AGND Analog Ground
TP20 AGND Analog Ground
Analog Signals
TP17 V
REF +1.65V Voltage Reference to bias op amp outputs
IA IA Internal Amplifier (dsPIC33CK256MP508 Op Amp 1) output of Phase A leg
current feedback of inverter
IA_EXT IA_EXT External Amplifier (MCP6024 U5A) output of Phase A leg current feedback of
inverter
IB IB Internal Amplifier (dsPIC33CK256MP508 Op Amp 2) output of Phase B leg
current feedback of inverter
IB_EXT IB_EXT External Amplifier (MCP6024 U5B) output of Phase A leg current feedback of
inverter
IC_EXT IC_EXT External Amplifier (MCP6024 U5C) output of Phase A leg current feedback of
inverter
I
BUS IBUS Internal Amplifier (dsPIC33CK256MP508 Op Amp 3) output of bus current
feedback of inverter
IBUS_EXT IBUS_EXT External Amplifier (U15 MCP651S) output of bus current feedback of inverter
IBUS_FILT_EXT IBUS_FILT_EXT Filtered Bus Current Feedback of Inverter, which is amplified by MCP651S
(U15); this output is connected to the negative input of one of the internal
comparators of dsPIC33CK256MP508 (U9) for overcurrent protection
VA VA Phase A Voltage Feedback
VB VB Phase B Voltage Feedback
VC VC Phase C Voltage Feedback
V
BUS VBUS DC Bus Voltage Feedback
TP14 TEMP_LOCAL MOSFET Temperature – output of on-board temperature sensor, MCP9700 (U14)
TP21 TEMP_EXT Output of External Temperature Sensor interfaced through connector J9
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