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No. 2D730-148E*O
6.6
PSAIPSD Unit
(1)
Outline
The PSA/PSD unit is a DC/DC conversion-type
multiple output power supply unit. This unit
generates and supplies the DC power used to operate the system and the peripheral devices
such as the system E/M (Electrical Module:
electronic circuit board module), main panel,
HDD, and FDD using the 48 VDC output from the AC/DC tray.
The PSA/PSD unit consists of two modules:
the analog power supply unit PSA (Power
Supply Analog), which supplies power to the analog front-end circuitry, and the digital power
supply unit PSD (Power Supply Digital), which supplies power to the digital back-end circuitry
and the peripheral devices.
(2)
Specifications
(a)
PSA
This is a multiple output power supply, including 12 fixed voltage outputs and 2 variable
voltage outputs (14 outputs in total).
The output power (with the suffix "AQ") is supplied to the circuit handling echo signals in
the system (such as the preamplifier) and therefore must have as low noise as possible.
The variable output powers VTXO and VTXI (voltages for transmission)
are used for
transmission
driving of transducers
in the Aplio system and control the acoustic power
emitted from the transducer directly. The Aplio system uses the dual pulser method and
has two similar transmission
drive pulsers. The two variable output powers VTXO and
VTXI, which have the same output characteristics,
are supplied to the drive pulsers.
output
power name
M2.0AQ
P3.3A
P3.3AQ
P5A
P5AQ
P7A
M9.6A
output
voltage
-2.10 v
+3.30 v
+3.45 v
+5.00 v
+5.00 v
+7.00 v
-9.60 V
Supply direction
circuit
Reception amplifier
etc.
F/E 3.3-V logic circuit
etc.
Reception amplifier
etc.
F/E D/A circuit etc.
Transmission
predriver circuit etc.
CB board +5-V circuit
CB board -5-V circuit
output
power name
P14AQ
M14AQ
PI OOHV
MIOOHV
EBN
VTXO
VTXI
output
voltage
-2.10 v
+3.30 v
+100 v
-100 v
-3.00 v
+0.125
to 18.0 V
+0.125
to 18.0 V
Supply direction
circuit
Relay drive power
supply
CB board -12-V
circuit etc.
HVSW plus power
supply
HVSW minus power
supply
EchoBooster
power
supply
Pulser drive power
supply
Pulser drive power
supply
6-7
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