Car 5W/10W wireless charger

product description

This product is suitable for most wireless charging mobile phones, the charging efficiency can be up to 75%; good compatibility, can support Ti, IDT, PANASONIC and other Qi standard receivers, compatible with USB power supply. 20mW extremely low standby power consumption, sensitive foreign body detection (FOD), overvoltage, overcurrent protection functions, and dual-color LED lights to indicate status.



LED status indication

Error description: There are two situations when the error occurs: one is power-on error: this is the module self-checking error, it may be the power supply voltage is too high, the temperature check is abnormal, etc. The other is the working process error: mainly detecting foreign objects or high temperature.

Specifications

Maximum rating

Rated parameters

Test piece: Ambient temperature of 25°C.

Other parameters

4. Electrical characteristics



4.1 Input characteristics

4.1.1 Input DC voltage: 5.0V—9.2V

4.1.2 Maximum input current: 2.0A

4.1.3 Average work efficiency: 72%



4.2 Output characteristics

4.2.1 Rated output voltage: slow charge 5.0V, fast charge 9V

4.2.2 Rated output current: 5V1A/9V1.1A

4.2.3 Rated output power: 5W/10W (compatible with Apple 7.5W)

4.2.4 Ripple: output ≤9V 1.1A (full load)



Test method: the input end is connected to the Power-Z instrument and the computer PC end Power-Z test software, the output end is connected to the wireless charging mobile phone, and the voltage and current curve diagram meets the requirements.



4.3 Protection function



4.3.1 Short circuit protection:

In the case of output short circuit, the output voltage is zero, and the on-board wireless charging stops working until the short circuit disappears and the charger starts to work. The input power in the case of output short circuit is extremely low and will not cause any harm to the charger and mobile phone.

4.3.2 Overvoltage protection:

When the circuit breaks down and the input voltage exceeds 10V, the over-voltage protection circuit will start immediately and quickly turn off the output, so that the mobile phone will not be damaged.

4.3.3 Over-temperature protection:

When the motherboard temperature reaches 60℃~75℃, the output power will be automatically reduced, and the output will be automatically turned off when it reaches 75℃~80℃ to protect the integrated circuit itself from damage.

4.3.4 Foreign body detection (FOD)

When there is a metal foreign body above the transmitting coil area, the output is automatically turned off and the LED light flashes quickly.



5. Environmental adaptability test



5.1 High temperature test:

The temperature is 85°C±5°C, and the duration is 8 hours. After being placed at room temperature for recovery, the electrical performance is normal.

5.2 Low temperature test:

The temperature is -25°C±5°C, and the duration is 8 hours. After being placed at room temperature for recovery, the electrical performance is normal.

5.3 Constant damp heat test:

The temperature is 40℃±5℃, the humidity is 90%～95%. After the experiment lasts for 48 hours, there is no corrosion on the exposed metal part, no internal breakdown or arcing phenomenon; insulation resistance ≥20MΩ, and the electrical performance is normal.



6. Mechanical test

6.1 Vibration test:

The frequency is 10-55Hz, the amplitude is 0.35mm, and it vibrates 10 times in each direction of the X, Y, and Z axes. After the vibration, there is no scratches on the appearance, no internal looseness and other mechanical damage; power-on test, no internal shock Wearing, arcing phenomenon; insulation resistance ≥20MΩ; electrical performance is normal.

6.2 Drop test:

The height is 1000mm, and it is dropped on a flat hardwood surface. It is counted as six sides, and falls naturally once on each side. Then the appearance is checked, and the insulation resistance and electrical properties are re-tested. There is no looseness and other bad appearance, no breakdown, arcing and other bad phenomena. The insulation resistance is also ≥20MΩ, and it is normal to use when it is re-energized.

6.3 Impact resistance test:

The DC input terminal repeatedly switches the power supply 100 times, the frequency is 1 time/2 seconds, and the charger works normally.

6.4 USB plug test:

The USB female socket can withstand more than 500 times of plugging and unplugging, and there will be no poor contact.

6.5 Product aging

Temperature 40℃, humidity 5%-95%, input voltage and current DC5V 2A, load 5V 1A, duration 8 hours. After the aging is completed, the subsequent functional test will not be performed until the temperature of the charger casing drops to 15-30°C.





Product appearance

Schematic diagram

PCB diagram

Industry Classification: Power Battery

Development platform: STM STMicroelectronics

Delivery form: PCBA

Performance parameters: PCB board size: 83.7*74.2mm, magnetic sheet size: 50*1mm, coil type: Qi A11 standard single-layer coil

Application scenario: suitable for most wireless charging mobile phones