Analysis schematic Chaolitong Phone Travel Charger

Description: Chaolitong Phone Travel Charger for Motorola models 308, 328, 338, and 368 series mobile phone batteries. This charger features a switch for nickel-cadmium, nickel-hydrogen, and lithium-ion batteries, along with a discharge function. It operates with an AC mains input of 150 to 250V at 40mA and provides a DC output of 300mA at 50V. The following information is based on the physical operating principle for reference. At no load, pin IC1 reads 0.08V, indicating V6 cutoff. Diodes VD10 and VD11 illuminate, showing corresponding capacities of 40% and 60%. When the voltage across resistors R40 and R41 rises to 2.63V, pin IC1 also reaches 2.63V, and the output transitions high, causing diode VD9 to light up, indicating an 80% charge capacity. When pin IC1 voltage reaches 2.66V, the output remains high, and VD13 lights up, corresponding to a 100% charge capacity. Even with VD13 illuminated, VD12 continues to blink, indicating that the battery has not yet reached full saturation. Only when the voltage at pin IC1 reaches 6.5V does VD12 gradually turn off, signaling that the battery is fully charged to saturation. Diode VD16 serves as overcurrent protection in the charging circuit, while VD8 provides reverse protection, preventing the charger from discharging back into the battery.

The Chaolitong Phone Travel Charger is designed for specific Motorola mobile phone models, ensuring compatibility with their battery technologies. The integrated switch allows users to select the appropriate battery type, optimizing charging conditions for nickel-cadmium, nickel-hydrogen, or lithium-ion batteries.

The charger operates efficiently within a voltage range of 150 to 250V AC, drawing a current of 40mA from the mains. It converts this input into a stable 300mA DC output, which is suitable for charging the designated mobile phone batteries. The circuit employs a series of diodes and resistors to monitor and indicate the charging status.

The monitoring system utilizes an integrated circuit (IC1) that provides feedback on the charging process. At no load, IC1 pin indicates a low voltage of 0.08V, which corresponds to a cutoff state for the charger. As the charging process begins, the voltage across resistors R40 and R41 is monitored. When this voltage reaches 2.63V, the output from IC1 transitions to a high state, turning on diode VD9, which signals that the battery is at 80% capacity.

As the charging continues and the voltage at IC1 reaches 2.66V, diode VD13 indicates a full charge capacity of 100%. However, the continued blinking of VD12 suggests that the battery has not yet reached its full saturation point. The final indication of a fully charged battery occurs when the voltage at IC1 reaches 6.5V, at which point VD12 turns off, confirming that the battery is fully charged.

In terms of safety features, diode VD16 is included to protect against overcurrent situations during charging, while diode VD8 prevents any reverse discharge from the battery back into the charger, safeguarding both the charger and the battery from potential damage. This comprehensive design ensures reliable performance and safety during the charging process of Motorola mobile phone batteries. Chaolitong Phone Travel Charger for Motorola to 308,328,338 and 368 series mobile phone battery. The charger has a nickel-cadmium, nickel hydrogen, lithium-ion battery switch, and having a discharge function. In 150 ~ 250V, 40mA when AC mains input, output 300 50mA DC current. The following are plotted based on physical operating principle, for your reference. on the contrary at no load, IC1 a pin is 0.08V, V6 cutoff), VD10, VD11 lights, indicating the corresponding capacity of 40%, 60%. When the partial pressure values R40, R41 rises to 2.63V, that IC1 foot equals 2.63V, after which foot via a resistor voltage divider was 2.63V, feet high output, VD9 lights corresponding to the charge capacity of 80%.

Only IC1 ? pin voltage 2.66V, feet only output high, VD13 lights corresponding to the charge capacity of 100%. Even when lit VD13, VD12 still blinks, it indicates that the battery has not yet reached full saturation. Only IC1 pin voltage 6.5V time, VD12 gradually turns off, the battery is fully charged to saturation.

VD16 played in the charge circuit, overcurrent protection role, VD8 play reverse the protective effect, avoid power charger, the battery reverse discharge.