MITSUMI
Remaining Battery Power Display MM1251, MM1252, MM1253
Step-up (Rank B) Type Inductor Values
This circuit allows step-up for LED lighting even when low only. The LED repeats On/Off at high frequency,
but to the human eye it appears as if the LED is lit. Therefore, we do not recommend the use of this step-up
circuit in other circuits.
Flashing interval Off interval
Inductor Value-Oscillation Frequency Characteristics (reference data)
Oscillation frequency (kHz)
V
CC
500
300
200
100
70
50
30
20
10
100
V
CC
=0.90V
V
CC
=0.95V
V
CC
=1.00V
200
300
500
700 1000
Oscillation frequency
Flash Cycle
Inductor value (µH)
Note : The above data are reference values. Please set constants using a ±50% variance.
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
