After Sales Technical Documentation CIGARETTE LIGHTER CHARGER LCH–2 Original, 05/94 NMP Part No.
Cigarette Lighter Charger LCH–2 After Sales Technical Documentation AMENDMENT RECORD SHEET Amendment Number Page 2 Date Inserted By Comments Original, 05/94
After Sales Cigarette Lighter Charger LCH–2 Technical Documentation CIGARETTE LIGHTER CHARGER LCH–2 CONTENTS Page No Introduction 5 General 5 Modes of Operation 5 Charge States and Charge Control 5 Charge Indication 5 Electrical Specifications 6 Functional Description 6 Circuit Description 6 General 6 Converter 6 Oscillator 6 Pulse–width Control 7 Current Limiting 7 Assembly Parts 9 List of Figures Figure 1: Block Diagram 8 Figure 2: Component Layout Diagram 8 Figure 3: Ex
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After Sales Cigarette Lighter Charger LCH–2 Technical Documentation Introduction General The LCH–2 Cigarette Lighter Charger is used for charging the battery of the phone from a 12 or 24 V cigarette lighter socket of a motor vehicle. The charger is provided with LED charging indication. Modes of Operation Charge States and Charge Control The LCH–2 cigarette lighter charger is used for charging a handportable phone from a car battery.
Cigarette Lighter Charger LCH–2 After Sales Technical Documentation * Battery capacity is maintained during a phone call by occasional rapid charge cycles. Consequently, the LED can be indicating either red or green. Electrical Specifications Operating input voltage: 9 to 32 V d.c. Input current without phone: < 60 mA Max. input current: 1.8 A Output voltage:– constant voltage: 12.5 1 V/0...400 mA constant current: 800 70 mA/5.0...
After Sales Cigarette Lighter Charger LCH–2 Technical Documentation Pulse–width Control Pulse width is controlled by comparator N110B, where the sawtooth voltage from the oscillator is compared to a d.c. control voltage. Max. control voltage is set by resistor divider R121/R120 to make sure that pulse width cannot reach 100 % under any conditions as this would mean short–circuiting VB to GND via V112. When the control voltage drops, so do the pulse width and the converter output current.
Cigarette Lighter Charger LCH–2 After Sales Technical Documentation Figure 1: Block Diagram Figure 2: Component Layout Diagram Page 8 Original, 05/94
After Sales Cigarette Lighter Charger LCH–2 Technical Documentation Figure 3: Exploded View Assembly Parts ITEM 1 2 3 4 5 6 7 8 9 10 11 12 C1 Q’TY CODE 3 9450050 9450051 9450052 9500005 6400056 6154430 9370095 7100408 5112050 9510050 9480023 Original, 05/94 DESCRIPTION Cover Bottom Head–screw Head–pin Connector spring PT–screw Type label Spiral cable Fuse 3.
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