80
5. TX Enable signal comes in, Tx channel starts to operate. TX channel consists of 2
channels of TX+ and TX-.
6. Enable signal basically plays a role of supplying -1350V to TX-.
7. TX-SENSING plays a role of constantly detecting the current value of 12μA.
TX-SENSING signal delivers a message "LOW LEVEL' to the machine when the
transfer output current is lower than 12μA,and when it is higher than 12μA, it
delivers "HIGH LEVEL".
8. CHG PWM : Controls CHG and PD channel voltage. PD channel use a zenor diode
to always maintain 200V compared to GND.
9. DEV PWM : Controls DEV, TR and BL channel voltage. TR and BL voltage use
zenor diode to always maintain DEV-120V and DEV-300V compared to
DEV output voltage.
∘ +24.5V ± 12.5% (+21.44V~+27.56V)
∘ Voh 5.0V Pull-up, Vol = Max. 0.8V(at Iol = 40mA, Vcc = 4.75V)
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