Microcomputer
STANDBY output
RESET
6. Peripheral circuits of microcomputer
Fig. 6-1 shows the microcomputer and its peripheral circuits, Table 6-1 shows the basic operation of
each circuit block, and Fig. 6-2 shows the system configuration.
IPM (Intelligent Power Module)
Detection resistor
DC current
DC voltage
Fig. 6-1 Peripheral circuits of microcomputer
Table 6-1
Circuit block
Peak current cutoff circuit
Detects DC current flowing into power module and, when over-current
(instantaneous value) flows, stops lower arm drive circuit and creates
Ip signal to stop microcomputer at the same time.
Overload control circuit
Protects compressor by judging overload status based on input current,
DC current and DC voltage.
Reset circuit
Creates reset voltage.
Basic operation
Rectifier circuit
6-1. Peak current cutoff circuit
Fig. 6-3 shows the peak current cutoff circuit and waveforms at each section.
Voltage at point
Voltage at point
(Main P
.W.B.)
HIC
Outdoor
microcomputer
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