1. Technical Information about Wireless Power Transfer When Using Transmitter Control IC (S-8474) and Receiver Control IC (S-8471)
Wireless power transfer can be easily achieved by combining the transmission and reception circuits, where the reception circuit receives the power of the transmission circuit. While it may be easily accomplished, thoroughly understanding this system is necessary for circuit design.
Therefore, downloadable documents are available for each category - please feel free to refer to them.
It is also possible to download an application note that combines the technical information of S-8474 and S-8471 into one document.
For detailed product information and specifications, please refer to the datasheets of each product.
Basic Operation of Wireless Power Transfer (S-8474 and S-8471) |
- Principle
- Phase direction due to coil connection and orientation
- Operation when receiver FET2 is ON
- Operation when receiver FET2 is OFF
- Relation between receiver FET2 control and receiver VDD voltage
| View Details |
Operation (S-8474 and S-8471) |
- Reception detection and operation mode of transmitter
- Reception detection mechanism of transmitter
- Transmitter coil, transmitter FET control, receiver coil, receiver FET control waveforms (Continuous operation mode)
- Transmitter coil, transmitter FET control, receiver coil, receiver FET control waveforms (Intermittent operation mode)
- Operation of receiver
- Distance between transmitter coil and receiver coil
- Waveforms during transmitter mode switching due to load fluctuation
| View Details |
Characteristics (S-8474 and S-8471) |
- Evaluation measurement circuit
- External components list
- Efficiency definition
- Precautions regarding measurement of load characteristics
- Efficiency per perpendicular distance between coils
- Efficiency per parallel distance between coils
- Efficiency and output voltage at different temperatures
| View Details |
Circuit Constant Determination Method (S-8474 and S-8471) |
- Resonant frequency
- tON time
- tOFF time
- Transmitter coil constant
- Receiver coil constant
- Over temperature protection function
- Transmission circuits
- Coils details
- Reception circuits
- System safety
| View Details |
Examples of Connection Circuits (S-8474 and S-8471) |
- Addition of a step-up switching regulator to transmitter with a single 5V power supply
- Application examples depending on load
- Examples of multiple reception circuits
| View Details |
Download an application note that combines the technical information of S-8474 and S-8471 into one document.
2. Technical Information about Wireless Power Transfer When Using Transmitter Control IC (S-8474) and Receiver Control IC with Charge Function (S-8473)
Wireless power transfer can be easily achieved by combining the transmission circuit and the reception circuit with a charge function to small lithium-ion rechargeable batteries. While it may be easily accomplished, thoroughly understanding this system is necessary for circuit design.
Therefore, downloadable documents are available for each category - please feel free to refer to them.
It is also possible to download an application note that combines the technical information of S-8474 and S-8473 into one document.
For detailed product information and specifications, please refer to the datasheets of each product.
Basic Operation of Wireless Power Transfer (S-8474 and S-8473) |
- Principle
- Phase direction due to coil connection and orientation
- Operation when receiver FET2 is ON
- Operation when receiver FET2 is OFF
- Relation between receiver FET2 control and receiver VDD voltage during precharge operation
| View Details |
Operation (S-8474 and S-8473) |
- Reception detection and operation mode of transmitter
- Reception detection mechanism of transmitter
- Transmitter coil, transmitter FET control, receiver coil, receiver FET control waveforms (Continuous operation mode)
- Transmitter coil, transmitter FET control, receiver coil, receiver FET control waveforms (Intermittent operation mode)
- Operation of receiver
- Distance between transmitter coil and receiver coil
| View Details |
Characteristics (S-8474 and S-8473) |
- Evaluation measurement circuit
- External components list
- S-8473 Series charge characteristics per perpendicular distance between coils
- S-8473 Series charge characteristics per parallel distance between coils
| View Details |
Circuit Constant Determination Method (S-8474 and S-8473) |
- Resonant frequency
- tON time
- tOFF time
- Transmitter coil constant
- Receiver coil constant
- Temperature protection function
- Transmission circuits
- Coils details
- Reception circuits
- System safety
| View Details |
Precautions for Use (S-8474 and S-8473) |
- When connected to a battery
- When wiring the board
| View Details |
Measures to Prevent Battery Consumption during Storage (S-8474 and S-8473) |
- When a battery is connected
- When using a lithium-ion rechargeable battery protection IC
- When providing a power supply switch
| View Details |
Examples of Connection Circuits (S-8474 and S-8473) |
- Addition of a step-up switching regulator to transmitter with a single 5V power supply
- When the STATUS pin is connected to the customer circuit
- Customer circuit operation during charging
| View Details |
Distance between Coils, Operation Range (S-8474 and S-8473) |
- Distance between Coils, Operation Range
| View Details |
Download an application note that combines the technical information of S-8474 and S-8473 into one document.
