Main Power Supply; Description; Power Supply Output Voltages; Lithium Ion Battery And Charger - Datascope Accutorr Plus Service Manual

Main Power Supply

1.4

Main Power Supply

There is one power supply used in the Accutorr Plus. P/N 0014-00-0083-02 is configured
for the use and charge of a Lithium Ion battery, P/N 0146-00-0069.
1.4.1

Description

The power supply provides four regulated DC output voltages for the Accutorr Plus. The
power supply can operate from an AC line or a lithium ion battery and will automatically
select the source of power available to the monitor, with priority given to the AC line. In
addition, the power supply can operate normally from the AC line without the battery or
with a battery cell shorted.
The power supply consists of two basic blocks. The first block is an AC to DC converter,
which consists of a universal AC input switching regulator and a battery charger for the
lithium ion battery. The second block consists of DC to DC converters that will supply
+5V, +12V, +/-15V. Power to the DC to DC converters is "ORed" from either the battery
or the output of the AC to DC converter. The power supply continuously monitors the
battery voltage and temperature to charge the battery as required.
1.4.2

Power Supply Output Voltages

VOLTAGE
+5 volts
+12.5 volts
±15 volts
Standby
1.4.3

Lithium Ion Battery and Charger

• Battery: 11.1V Lithium Ion battery (3S2P, 4.4 Ah min), P/N: 0146-00-0069
• Battery charger: fully charges the Lithium Ion battery (P/N 0146-00-0069) within a
max. of 4 hours (with the monitor in STANDBY mode), and not overcharge if left on
continuously. The power supply automatically reduces the charging current during
peak power demands on the +5V and +12.5V outputs.
• Battery temperature: monitored with NTC thermistor Semitec P/N 103AT-2.
• Charge temperature: 0ºC to 50ºC
• Discharge temperature: -10ºC to 60ºC
• Charger power requirements: Nominal power (during current-limit mode) decreases
linearly from 28W to 0W; maximum power (during fast charge) is 31.5 W max.
1 - 14
TOLERANCE
±2%
±5%
±3%
7.7V to 13.6V
0070-10-0691
Theory of Operation
MAXIMUM CURRENT
2.63 amps
0.55 amps
±100mA
17mA
Accutorr Plus Service Manual