Ricoh R3111x Series - Manual (Page 23)

R3111x
23
•
Voltage level Indicator Circuit (lighted when the power runs out)
(Nch Open Drain Output)
R3111xxxxA
Series
V
DD
GND
OUT
V
DD
•
Detector Threshold Adjustable Circuit
(Nch Open Drain Output)
R3111xxxxA
Series
GND
V
DD
Rb
V
DD
C
Ra
OUT
+
Adjusted Detector Threshold
=(−V
DET
) ×(Ra+Rb)/Rb
Hysteresis Voltage
=(V
HYS
) ×(Ra+Rb)/Rb
∗) If the value of Ra is set excessively large, voltage
drop may occur caused by the supply current of IC
itself, and detector threshold may vary.
•
Window Comparator Circuit
(Nch Open Drain Output)
R3111xxxxA
Series
V
DD
GND
OUT
V
DD
R3111xxxxA
Series
V
DD
GND
OUT
−V
DET
1
WC_OUT
−V
DET
2
V
DD
−V
DET
1
GND
WC_OUT
−V
DET
2
GND
•
Over-charge Preventing Circuit
R3111xxxxC
Series
V
DD
GND
OUT
R4 R2
R1
R3
Light
Sol
ar
B
atter
y
D1
Load