Panasonic BL-C111A Service Manual - Page 13

Pyroelectric Infrared Sensor Block

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4.1.5. RTC Real Time Clock (IC3) Operating Power Supply: 3.3V (3V battery for back up) Package: 8 pin SOP Outline of Operation: Stores Clock Data and resonates 32.768 KHz Clock Signal. Backup Battery provides power when power supply is out. Lithium Battery (BAT1) Output Voltage: 3V Capacity: 220mAh Outline of Operation: A backup power supply for Real Time Clock (IC3). 4.1.6. Pyroelectric Infrared Sensor Block BL-C111A/BL-C131A Pyroelectric Infrared Sensor (IC801) Operating Power Supply: +3.3V Package: 3 pin Board Insertion Type Changes temperature variation into analogue signal which it emits, when a heat source, such as a person, comes into detection area. The analogue signal is amplified by Operational Amplifier (IC802). 2 Circuits Built-in Operational Amplifier (IC802) Operating Power Supply: +3.3V Package: 8 pin SSOP Amplifies analogue signal from Pyroelectric Infrared Sensor (IC801). Operation of Pyroelectric Infrared Sensor 1. Pyroelectric Infrared Sensor (IC801) emits analogue signal, when a heat source, such as a person, moves into the detection area. 2. Above signal is amplified by Operation Amplifier (IC802) which emits analogue signal. 3. Above signal is input to AD of CPU (IC101) and the signal amplitude exceeds the specified voltage range, a reaction occurs. 13

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BL-C111A/BL-C131A
4.1.5.
RTC
Real Time Clock (IC3)
Operating Power Supply: 3.3V (3V battery for back up)
Package: 8 pin SOP
Outline of Operation: Stores Clock Data and resonates 32.768 KHz Clock Signal.
Backup Battery provides power when power supply is out.
Lithium Battery (BAT1)
Output Voltage: 3V
Capacity: 220mAh
Outline of Operation: A backup power supply for Real Time Clock (IC3).
4.1.6.
Pyroelectric Infrared Sensor Block
Pyroelectric Infrared Sensor (IC801)
Operating Power Supply: +3.3V
Package: 3 pin Board Insertion Type
Changes temperature variation into analogue signal which it emits, when a heat source, such as a person, comes into detection
area.
The analogue signal is amplified by Operational Amplifier (IC802).
2 Circuits Built-in Operational Amplifier (IC802)
Operating Power Supply: +3.3V
Package: 8 pin SSOP
Amplifies analogue signal from Pyroelectric Infrared Sensor (IC801).
Operation of Pyroelectric Infrared Sensor
1. Pyroelectric Infrared Sensor (IC801) emits analogue signal, when a heat source, such as a person, moves into the detection
area.
2. Above signal is amplified by Operation Amplifier (IC802) which emits analogue signal.
3. Above signal is input to AD of CPU (IC101) and the signal amplitude exceeds the specified voltage range, a reaction occurs.