After Sales Desktop Charger CHH–2 Technical Documentation Desktop Charger CHH–2 General The CHH–2 desktop charger is designed for the charging of the handport- able phone and a spare battery. In a standard configuration rapid charg- ing is possible by connecting the desktop charger to an ac power outlet via a suitable constant current ac adapter (ACH–4).
After Sales Desktop Charger CHH–2 Technical Documentation Charging Indication Charge is indicated with two dual–colors led‘s, one for the phone and one for the extra battery pack. The liquid–crystal display of the phone also contains a three–bar battery display. Led‘s are dim when there is no phone or extra battery connected. Right led for handportable: Red phone led indicates a fast charge mode of the phone battery.
After Sales Desktop Charger CHH–2 Technical Documentation External Signals and Connections The charger has three external connectors, the AC fast travel charger connector, the phone charging connector and the spare battery connec- tor. Fast Travel Charger Connector X130 Pin: Name: Description: Supply voltage input Common ground...
After Sales Desktop Charger CHH–2 Technical Documentation Circuit Description The DC2 desktop charger module consists of microcomputer based con- trol logic for spare battery charging and discharging. It also has power outlet for transportable phone. Control Logic Charging is controlled by processor D150. It is a single–chip type control- ler incorporating RAM, ROM, A/D converter, and a multifunction timer/ counter.
After Sales Desktop Charger CHH–2 Technical Documentation AN5/CHVOL Charger voltage detection AN7/LIREF Lithium reference voltage input range: 0...5 V resolution: 19.5 mV/bit Charging the Spare Battery Charging current for the spare battery is fed in via switching transistor V130 and Schottky diode V131. The transistor is controlled by the proces- sor (BSW line).
After Sales Desktop Charger CHH–2 Technical Documentation capacitor is charged through resistor R163. This voltage is fed to regula- tor N100 shutdown input (pin 3) through transistor V162.The 5V reference supply is generated by regulator N100.If the processor stops the voltage across the capacitor increases and the regulator is switched off.