Hardware Detail; Power Supply - Renesas MCI-HV-1 User Manual

MCI-HV-1 User's Manual

4. Hardware detail

This section describes each functional block configuration. Refer to the schematic when necessary.

4.1 Power supply

4.1.1 Voltage regulator
When AC input is used as main power, this product generates DC15V, DC12V and DC5V internally.
When DC input is used as main power, sub power input (DC15V) is required. DC12V and DC5V are generated
internally from sub power input.
Table 4-1shows detail of each power supply.
Voltage
DC15V
DC12V
DC5V
4.1.2 Voltage sensing
AC input voltage (ACINL, ACINN) is converted to analog signals ranging 0~AVCC according to the following
equation and output to CPU board connector (pin 15 of CN8) as VAC_AD. AVCC is the power for analog
circuit, supplied from CPU board.
Bus voltage (VBUS) is sensed with the circuit shown in Fig. 4-1 and the sensing signal is output to CPU
board connector.
R12UZ0138EJ0100 Rev.1.00
February 28, 2024
Table 4-1 Regulated voltages
Rated current
1.33A
500mA
2A
VAC_AD = ( ACINL − ACINN ) ×
Fig. 4-1 Bus voltage sensing circuit
Application
Generates DC12V and DC5V
Drives IGBT module and relay
Drives gate drivers
Drives FAN
Power supply for control circuit and
CPU board
4.7 AVCC
+
2004.7 2
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