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Configuration of each DC-DC converter power supply
Circuit configuration diagram
OUT_24V
IC5001
2-channel
synchronous
rectification-type
step down
DC-DC converter
AC_OFF_DET_X
This signal is used to notify that an input voltage is applied to the BC board and the BA board when an input voltage of
OUT_24V or DC_24V is detected.
DC_LEVEL
This signal is used to notify the BA board of the input voltage level when an input voltage of OUT_24V or DC_24V is
detected.
Power on sequence
Power is turned on according to the following sequence.
1.
Turn on AC power or external DC power.
2.
A voltage of OUT_24V or DC_24V is input to the DC/DC block.
3.
Voltages +5V, +12V_BA, +12V_FAN, and +12V_Controller are output.
4.
A voltage of +28V_TC is output.
+5V/+12V_BA synchronous rectification-type step-down DC-DC converter
• +5V supply: To the BC board (for signal power)
BVM-E171
IC3003
Detection circuit
IC3005
Detection circuit
IC4000
2-channel
synchronous
rectification-type
step down
DC-DC converter
IC5002
Synchronous
rectification-type
step up DC-DC
converter
DC_LEVEL
AC_OFF_DET_X
Filter
IC7000
Overcurrent
+12V_Controller
protection circuit
+ 28V_TC
+5V
+12V_BA
+12V_FAN
7-7
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