mm1491 Mitsumi Electronics, Corp., mm1491 Datasheet
mm1491
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mm1491 Summary of contents
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... Consumption current (normal mode V 4. Consumption current (overdischarge mode V 5. Overcurrent detection reset conditions Package SOT-26A Applications Lithium ion battery packs (for battery protection) pins, but MM1491 has only the V Temperature conditions A:Ta=-25 ~ 75°C, B:Ta=-20 ~ 70°C, C:Ta=0 ~ 50°C, D:Ta=0 ~ 40°C, E:Ta=-20 ~ 25°C Overcharge Overcharge detection voltage detection ...
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Block Diagram 1: Over-discharge detection voltage * 2: Over-charge detection voltage * Pin Assignment 6 1 SOT-26A GND DO ...
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Pin Description PIN No. PIN Name Overcurrent detection input pin. Detects discharge current by connection to charging control VM 1 FET source pin. Discharge current = (voltage between V V The positive source pin of this IC and connecting the ...
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Pin Description Pin No. Pin name Equivalent circuit diagram Absolute Maximum Ratings Item Storange temparature Operating temparature Supply voltage Pin voltage Allowable loss Recommended Operating Conditions Item Operating tempareture Supply ...
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... >1.0V V DOL2 CO1 CO2 =3.6V, between GND-VM voltage PRO =0V, Charger voltage 0V CC =3.6V, model name MM1491B) CC Min. Typ. Max. Unit 10.0 6.0 0.05 35 4.325 4.350 4.375 H L 100 200 L 2.30 2.40 2.88 3.00 H 174 200 L 130 50 1.3 7.0 10.0 0.5V 7.0 10.0 2V 0.02 50 100 V -0 ...
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Measuring Circuit Measuring Circuit 1 Measuring Circuit 2 Note : 0. GND GND -1V/100 s 3.0V VDO 2. GND GND 1V/100 s 4.5V V ALM V CC 4.0V ...
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Timing Chart Over - charge voltage Dead time CELL voltage TD voltage CO voltage DO voltage V voltage M Application Circuits Note: Applicable circuits shown are typical examples provided for reference purposes. Mitsumi cannot assume responsibility for any problems arising ...
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... Application Description Outline The MM1491 Series are protection IC for over-charge, over-discharge and over-current of rechargeable one- cell Lithium-ion, further include a short circuit protector for preventing large external short circuit current. 1. Overcharge detection · The overcharge detector monitors V threshold VALMI (4.2V typ.) from a low value higher than the VALMI, the overcharge detector can sense a overcharging and an external charge control Nch-MOS-FET tums to " ...
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Overdischarge detector · The voltage pin) is observed when the battery is discharged, and V CC overdischarge detector under overdischarge detect voltage (2.3V typ.). The electrical discharge is stopped by DO pin (6 pin) outputting "L", ...
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Note on use · The power supply change is suppressed by R1 and C1. However, the detecting voltage rises about (current consumptions * resistance) when R1 is enlarged. Uses R1 below 330 . · The voltage change ...
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Dead time vs external capacitor (When overcharge detection 0.1 0.01 0.01 0.1 External capacitor ( F) When incleasing cell voltage supply current vs supply voltage 6.0 When voltage release 5.0 4.0 3.0 2.0 1 ...