MM1251B データシートの表示（PDF） - Mitsumi

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MM1251B

Remaining Battery Power Display

Mitsumi 

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)

VCC

500

300

200

Oscillation frequency

Flash Cycle

100

70

50

30

VCC=0.90V

20

VCC=0.95V

VCC=1.00V

10

100

200 300 500 700 1000

Inductor value (µH)

Note : The above data are reference values. Please set constants using a ±50% variance.

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