Physio Control LIFEPAK 9 - Page 24

LIFEPAK 9 defibrillator/monitor
BATTERY POWER ENABLE
Goon ) юж SWITCHING | +
CONTROL POWER SUPPLYÎ „15V
1 age
SW BATT MAIN PCB :
| PWR SW MONITOR É CHARGE LED DRIVE
ー 2 _ CHARGE INHIBIT
W POWER q — POWER ENABLE À _ CONVERTER FUNCTION SELECT
a SYSTEM :
SW BATT2 #1 MONITOR i CONVERTER DATA OUT
MICROPROCESSOR CONVERTER DATA IN
+2.5V
VO
CLOCK
TRANSFER | CHARGE VALID
RELAY <
DUMP ENERGY OUMP INHIBIT 14
COIL DUMP
TRANSFER REQUEST
À TRANSFER | ENERGY TRANSFER ENABLE
COIL TRANSFER SLEEP INHIBIT
+15V | δν
PADDLES TIT
ANALOG [<
si VOLTAGE
EVALUATION [+
|
Lili ВА:
1
D15
SW VBATT +2.5V SERIAL DATA
BATT INTERFACE 014
1 /
Q
ENERGY È LOW ENERGY
MONITOR 2 CHARGE RATE
ono CAPACITOR
CHARGE LED VA
DRIVE ur CHARGE =
(O chance Js CONTROL
} ì
'
ENERGY STORAGE EXTERNAL
STORAGE 一 capacitor Fr CONTROL fee
CAPACITOR | CHARGEA INPUT
CHARGE LED DRIVE
Figure 1-3 Power Conversion PCB Block Diagram
Logic Power Monitor The Logic Power Monitor checks the logic supply voltage. If the logic
voltage is above or below normal limits, it deactivates Q11 and disables the
Power Control circuit. Comparator US functions as a window detector for
high voltages (USA) and low voltages (USB). The comparator reference
voltages are set by Diode IC U4 at +2.5V. The output of the Power Control
circuit, SWBATT, generates the operating voltage for U5, U4, and the
Switching Power Supply.
The System microprocessor shuts down the instrument by sending a low
signal to the POWER ENABLE line. This switches the open collector output
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