Respironics Trilogy 02, Technical Information

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P
AGE
4-2
T
RILOGY
S
ERVICE
& T
ECHNICAL
I
NFORMATION
1002735, V
ER
. 05
4.2 P
OWER
M
ANAGEMENT
B
OARD
The Trilogy ventilator is designed to accept four power sources each providing enough power to support the
complete functionality and performance of the ventilator. The power management board controls all these
power sources for the Trilogy ventilator. The power sources are used according to the predefined hierarchy
and rules set forth. The power management board is also capable of removing all power from the ventilator
except for those devices powered by a low current supply to conserve power when the ventilator is turned off
or running on battery. Lastly, the power management board provides a source of power diagnostic information
through analog sense voltages and the SMBus to the CPU.
F
IGURE
4-2 P
OWER
M
ANAGEMENT
B
OARD
B
LOCK
D
IAGRAM
AC/DC power supply - It is the primary source of power for the Trilogy ventilator. It supplies 29±1VDC to the
power management board and the Trilogy ventilator may draw up to a maximum of 3A continuous and 5A peak
current from this power source. When this supply is available no current is drawn from any other remaining
power source.
External Pb-Acid Battery - The Trilogy ventilator can operate on an external Pb-acid battery with output
voltage between 11VDC to 28VDC when the AC/DC power supply is not available. The external Pb-acid
battery input is reverse polarity protected (Q1). The Trilogy ventilator can not charge the external Pb-acid
battery and can not use this source to charge the lithium ion batteries.
Detachable Lithium Ion Battery - This power source is used by the Trilogy ventilator when AC/DC power
supply and external Pb-acid battery power supply is not available. It provides 12VDC to 16.4VDC supply to the
ventilator and is rated for 4.16Ah @ 14.4V. The Trilogy ventilator may draw a maximum of 7.5A continuous or
14A peak current from the detachable lithium ion battery source. This battery is charged by the AC/DC power
supply only when its capacity is less than 100%, the environment is safe to charge the battery and when
charging would not overburden the AC/DC power supply.
Internal Lithium Ion Battery - This is the fourth and last available power source for the Trilogy ventilator. It is
permanently located inside the unit and is identical to the detachable lithium ion battery (i.e. 12VDC to
16.4VDC, 4.2 Ah capacity). If the internal lithium ion battery is totally discharged and no other power source is
available, the Trilogy ventilator will turn OFF, enable the power fail alarm and enter a low power state.
Boost
Converter
Reverse
Poloarity
Protection Power Mux
Power Path
Controller
Discharge
Switch
Charge
Switch
Half Bridge
Buck
Converter
Smart Battery System Manage
3.3 VDC
Li-ion
AC/DC
Power
Supply
External
Lead-Acid
Battery
Detachable
Lithium Ion
Battery
System
Board
3.3 VDC
Sleep
Internal
Lithium Ion
Battery