TISP7125F3D datasheet(19/25 Pages) POINN

19 / 25 page

MARCH 1994 - REVISED MARCH 2000

TISP7125F3, TISP7150F3, TISP7180F3, TISP7240F3, TISP7260F3,

TISP7290F3, TISP7320F3, TISP7350F3, TISP7380F3

TRIPLE BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS

P R O D UCT

INFORM A T ION

longitudinal balance

Figure 35 shows a three terminal TISP® with its equivalent “delta” capacitance. Each capacitance, CTG ,CRG

and CTR , is the true terminal pair capacitance measured with a three terminal or guarded capacitance bridge.

If wire R is biased at a larger potential than wire T then CTG >CRG . Capacitance CTG is equivalent to a

capacitance of CRG in parallel with the capacitive difference of (CTG -CRG ). The line capacitive unbalance is

due to (CTG -CRG ) and the capacitance shunting the line is CTR +CRG/2 .

Figure 35.

All capacitance measurements in this data sheet are three terminal guarded to allow the designer to

accurately assess capacitive unbalance effects. Simple two terminal capacitance meters (unguarded third

terminal) give false readings as the shunt capacitance via the third terminal is included.

TISP7125F3D Datasheet(PDF) 19 Page - Power Innovations Ltd