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10
KX-NCP1171XJ
5.2.3.
Power Supply Circuit
5.2.3.1.
Power Supply Voltage Generator
The input from the main power supply is in 3 voltage levels: +15V,+15VPT,+40V.
Since the voltage levels: +15V,+5V,+3.3V,+40V,+160V,-100V and AC75Vrms are required onboard, voltage levels are generated
onboard as written below.
Since the voltage levels: +15V,+5V,+3.3V,+40V,+160V,-100V and AC75Vrms are required onboard, voltage levels are generated
onboard as written below.
5.2.3.2.
DC/DC Circuit (+3.3V, +5V)
The protection circuit consists of an output short protection and an overvoltage protection.
When an output of power supply is short, IC800 or IC801 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q802 and/or Q803 short, it is detected by D806 and D807.
Q800 is cut by Q801 to shut down the input power supply as overvoltage protection.
When an output of power supply is short, IC800 or IC801 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q802 and/or Q803 short, it is detected by D806 and D807.
Q800 is cut by Q801 to shut down the input power supply as overvoltage protection.
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