Theory of Operation
40
40-5648-51B
DC to DC converter
The circuits for the DC-DC Converter provide all regu
-
lated voltages required by the hardware sub-circuits.
•
A switched DC source, (battery, regulated mains
supply, or external DC) powers the converter section
under the control of the Power Control circuitry.
•
The converter design provides stable supply opera
-
tion from an unregulated DC source, simplifying the
requirements for the switched sources.
•
Refer to the DC-DC Converter section of the Main
PCB schematic for details.
Switched
DC Source
Logic Supply
5 volt
Buck / Boost
Converter
Main Supply
17 volt
Boost Converter
Positive Supply
+ 10 volts
Negative Supply
– 10 volts Inverter
LCD Contrast
Supply
LCD Backlight
Control
Analog Supply
5 volts Linear
Flowchart of DC & DC Converter Operation
Logic supply, U12
The Logic Supply current-mode switching regulator
provides a regulated output voltage of 5 volts (
±
5%) for
the system logic.
Motor supply, U34
The Motor Supply is a current-mode switching regula-
tor provides a regulated output voltage of
17 volts
for the
motor current regulators.
Analog supply, U21
The Analog Supply is provided specifically for low noise
signal processing circuits. Being a linear supply, inher-
ent noise rejection removes source input switching noise
from it’s regulated output.
Содержание Medfusion 3000 Series
Страница 1: ...s Medfusion 3000 Series Technical Service Manual ...
Страница 2: ...Table of Contents ii 40 5648 51B ...
Страница 20: ...Introduction 14 40 5648 51B ...
Страница 32: ...Scheduled Maintenance 26 40 5648 51B ...
Страница 80: ...Troubleshooting 74 40 5648 51B ...
Страница 116: ...Calibration Adjustment 110 40 5648 51B ...
Страница 158: ...Assembly Drawings Parts Lists 152 40 5648 51B Medfusion 3000 series main pump assembly See Note 1 ...
Страница 160: ...Assembly Drawings Parts Lists 154 40 5648 51B Case bottom assembly Medfusion 3500BC ...
Страница 162: ...Assembly Drawings Parts Lists 156 40 5648 51B Case top assembly w plunger ...
Страница 164: ...Assembly Drawings Parts Lists 158 40 5648 51B Case top assembly without plunger ...
Страница 167: ...Assembly Drawings Parts Lists 161 40 5648 51B Barrel clamp assembly GREASE SILICONE III SOLDER NO CLEAN ...
Страница 172: ...Assembly Drawings Parts Lists 166 40 5648 51B Accessories parts list Poleclamp assembly ...
Страница 182: ...Index 176 40 5648 51B ...
Страница 183: ......