Power Management (Pm) Pcba; Power Supply; Internal Battery - Philips Respironics V60 Service Manual

PM PCBA

Power supply

Internal battery

1049766 Rev A
3.2.1

Power management (PM) PCBA

• Battery charging and management circuitry
• Internal supply voltages (supply voltages: 3.3 V, 5 V, 12 V, 35 V).
• Fan power and tach monitoring.
• Backup alarm control circuitry, including power fail detection.
• Power switch control circuitry.
• System alarm and reset management.
• Electrical interfaces between the CPU PCBA, LCD, and the user
interface (UI) PCBA.
• Includes an EEPROM for calibration data, board identification
information, and PM PCBA power-on hours.
3.2.2 Power Supply
• Provides ventilator and battery recharging power from AC line voltage.
• Converts AC line voltage (100 to 240 VAC, 50 to 60 Hz) into 24 VDC
power.
• Includes input over-current, output over-voltage, and output current-
limiting protection.
3.2.3 Internal Battery
• 14.4-V, 11.5-Ah lithium-ion battery has a run-time of at least six
hours under normal conditions.
• Provides operating power when AC power is not available.
• Provides charge and temperature status to the PM PCBA.
• Internal circuitry monitors battery status, provides self-contained
fault control features, and communicates this information to the PM
PCBA.
V60 Ventilator Service Manual
Chapter 3: Theory of Operation
3-7