D4 in the schematics of the transistor below are used to turn on M1 and M2 with protecting them from overvoltage at the same time. The efficiency of the transmitter relies of the spacing between it and the receiver. Larger distance between the results in a lower power transfer efficiency. These are shown if tables 6.2.2d, 6.2.2e and 6.2.2f. The preferred choice for the design is the option with a 10.5mm gab shown in figure 6.2.2f. Figure 6.2.2a schematic of Transmitter LTC4125 (Used with Permission from Linear Technology) The pin configuration for the LTC 4120 receiver are shown in figure 6.2.2b Figure 6.2.2b Pin Configuration for the LTC 4125 Transmitter (Used with Permission from Linear Technology) Figure 6.2.2c schematic of Basic Transmitter by Powerbyproxi (Used with Permission from Linear Technology) SPECIFICATION WITH RECEIVER (NO WITH RECEIVER LOAD) (1.535W LOAD) Operational Frequency 129.5kHz 129.5kHz Input Voltage 4.99V 4.96V Input Current 0.154A 0.602A RMS Value of Tx 10.9V 10.5V Output AC Voltage Peak Value of Tx 15.2V 15.2V Output AC Voltage Receiver Output DC 23.9V 17.5V Voltage Standby Loss 0.768W N/A Efficiency N/A 51.4% 6.2.2d Transmitter circuit parameters 7.55mm Gap SPECIFICATION WITHOUT WITH WITH RECEIVER RECEIVER RECEIVER (STANDBY) (NO LOAD) (1.58W LOAD) Operational 130.5kHz 128.7kHz 128.9kHz Frequency Input Voltage 4.99V 4.99V 4.95V Input Current 0.15A 0.173A 0.676A
D4 in the schematics of the transistor below are used to turn on M1 and M2 with protecting them from overvoltage at the same time. The efficiency of the transmitter relies of the spacing between it and the receiver. Larger distance between the results in a lower power transfer efficiency. These are shown if tables 6.2.2d, 6.2.2e and 6.2.2f. The preferred choice for the design is the option with a 10.5mm gab shown in figure 6.2.2f. Figure 6.2.2a schematic of Transmitter LTC4125 (Used with Permission from Linear Technology) The pin configuration for the LTC 4120 receiver are shown in figure 6.2.2b Figure 6.2.2b Pin Configuration for the LTC 4125 Transmitter (Used with Permission from Linear Technology) Figure 6.2.2c schematic of Basic Transmitter by Powerbyproxi (Used with Permission from Linear Technology) SPECIFICATION WITH RECEIVER (NO LOAD) WITH RECEIVER (1.535W LOAD) Operational Frequency 129.5kHz 129.5kHz Input Voltage 4.99V 4.96V Input Current 0.154A 0.602A RMS Value of Tx Output AC Voltage 10.9V 10.5V Peak Value of Tx Output AC Voltage 15.2V 15.2V Receiver Output DC Voltage 23.9V 17.5V Standby Loss 0.768W N/A Efficiency N/A 51.4% 6.2.2d Transmitter circuit parameters 7.55mm Gap SPECIFICATION WITHOUT RECEIVER (STANDBY) WITH RECEIVER (NO LOAD) WITH RECEIVER (1.58W LOAD) Operational Frequency 130.5kHz 128.7kHz 128.9kHz Input Voltage 4.99V 4.99V 4.95V Input Current 0.15A 0.173A 0.676A
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