MM1433 查看數據表（PDF） - Mitsumi
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MM1433 Datasheet PDF : 18 Pages
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MITSUMI
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
(2) Timer Times
Item
Calculation formula
Pre-charge timer
T 219
Full charge timer
T 223
1mA charge time
T 213
Full charge detection delay time
T 26
Overcurrent detection delay time
T 28
Overvoltage detection delay time
T 28
Re-charge detection delay time
T 25
LED R blinking cycle
T 210
Examples of calculation (for C = 0.01µ, R = 230k)
15min. 28s
4h7min.
14.5s
0.90s
0.45s
0.45s
56.6ms
1.8s
Note: T: OSC oscillation cycle
Operation
1. Basic Functions
· Constant voltage/constant current control.
· Full charge status detection.
2. Protection Functions
· Protection when AC adapter or battery is abnormal.
· Protection from abnormal operation by monitoring battery temperature.
· Protection from abnormal operation by time limitation.
3. Warning Functions
· Constant lighting of green LED to show completion of normal charging
· Constant lighting of red LED to show normal charging operation
· Blinking of red LED showing charging disabled on detection of abnormality.
· Operation check of internal timer for time limitation
4. Forced Stop Function
· Forced stopping of charging by controlling RESET and CHGSW pins.
5. Charge Restart Functions
· Charge restart when battery voltage drop detection operates after full charge detection
· Charge restart by reconnecting after disconnecting AC adaptor
· Charge restart by reconnecting after removing batteries
· Charge restart by canceling forced stop operation
Description
1. Charging Operation
1.1 Start of Charging
· Charging is disabled at the start of charging in the following cases:
1) Battery is in overvoltage state, i.e., the battery voltage is higher than overcharge detection voltage
(Vov). (Charging is prohibited after overvoltage delay time elapses.)
2) AC adapter or battery is not correctly connected.
3) RESET pin and CHGSW pin are 0.6 ~ 1.2V.
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