M61880FP
Meanwhile, ISW can be expressed as follows.
Isw = 2 • Iswo−Isw2
............................ (7)
The relationship between ISW and ∆V is found as shown below.
Substituting Equation (6) in Equation (7),
I2
I
SW = 2 • ISWO
(
)
............................ (8)
)
............................ (9)
I1 + I2
and further substituting Equation (3),
Id
I
SW = ISWO
(1+
250µA
Next, substituting Equation (2) gives the relationship between ISW and ∆V as follows.
∆V/2kΩ
ISW = ISWO (1+
)
............................ (10)
250µA
A characteristic curve of the CH pin voltage and switching current is shown toward the end of “Electrical Characteristic
Graphs” following.
Rev.1.0, Sep.19.2003, page 17 of 20
RENESAS [ RENESAS TECHNOLOGY CORP ]
