M62281P/FP
Supply Current (at timer latch) I
CC
OFF (mA)
3.0
2.5
Latch reset
8.3 V
2.0
1.5
1.0
0.5
0
5
10
15
20
25
30
35
40
Supply Voltage V
CC
(V)
Figure 4 Supply Current vs. Supply Voltage Characteristics (at Timer Latch)
Even if the timer function is not needed, latch function operates, that is, IC becomes in operative when the voltage of
CT terminal is forced to be high voltage. Therefore, CT terminal can also be used for OVP (over voltage protection).
When only OVP function is needed (timer latch function is not necessary), connect the resistor between CT terminal
and GND. In this case, the above mentioned charge current cannot make the voltage of CT terminal rise up to “H”
threshold, thus latch function does not operate. (Refer to figure 5-1, 5-2)
V
CC
OVP function operates
when photo-coupler is ON.
CT
+
Figure 5-1 Method to Use Timer Type Latch And OVP
V
CC
OVP function operates
when photo-coupler is ON.
CT
+
Figure 5-2 Method to Use Only OVP
REJ03D0840-0201 Rev.2.01 Nov 14, 2007
Page 7 of 12
RENESAS [ RENESAS TECHNOLOGY CORP ]
