mm1475 Mitsumi Electronics, Corp., mm1475 Datasheet
mm1475
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mm1475 Summary of contents
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) Monolithic IC MM1475 Outline This lithium-ion battery charge control IC one-chip charge control IC where the protection circuit incorporates constant-current/constant-voltage charge and precharge, precharge timer, and battery temperature detection functions ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Block Diagram SW1 SW2 Charging Current limit OFF ON Controlled by this IC (Current limit 2: 25mV) ON Controlled by adaptor (Current limit 1: 450mV) ON Controlled by adaptor (Current limit 1: 450mV) Timer OFF ON OFF OFF ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Pin Description Pin No. Pin name I/O Function SW1 Input 1 SW2 Input 2 TP1 Input/output 3 VREF Output 5 GND1 Input 6 GND2 Input 7 ADJ1 Input 9 CDO Output 10 T Output 11 OUT TDET Input 12 BAT Input Input CS+ ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Pin Description The following valaeis typical Pin No. Pin name Internal equivalent circuit diagram SW1 1 SW2 2 TP1 VREF ADJ1 9 CDO 10 Pin No. Pin name Internal equivalent circuit diagram T 11 OUT TDET 12 13 ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Pin No. Pin name Internal Equivalent Circuit Diagram Pin No. Pin name OUT VDET-TD 21 Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss Recommended Operating Conditions Item Operating temperature ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Electrical Characteristics Item Consumption current 1 Consumption current 2 Reference voltage ADP detection voltage L ADP detection voltage L Hysteresis voltage width ADP detection voltage H ADP detection voltage H Hysteresis voltage width BAT pin leak current BAT pin output voltage ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Reference Materials on OSC CR Setting (1) OSC CR - Oscillation cycle T Table R 75k C 0.47ms 0.0047µ 0.83ms 0.0082µ 1.03ms 0.01µ 1.48ms 0.015µ 2.16ms 0.022µ (2) Timer Times Item Formula Pre-charge timer OSC oscillation cycle ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Measurement method Item Consumption current 1 Consumption current 2 Reference voltage ADP detection voltage L ADP detection voltage L Hysteresis voltage width ADP detection voltage H ADP detection voltage H Hysteresis voltage width BAT pin leak current BAT pin output voltage ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Timing Chart When charging is performed normally Pre-Charging Time Start 4.1V BAT pin 3V voltage 2V Charging current 0A Full charge Pre-charging H L SW1 H L SW2 Start BAT pin voltage ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Application Circuit ...
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... Lithium-Ion Battery Charge Control (microcomputer-controlled type) (1 cell) MM1475 MITSUMI Characteristics Current Limit 1 vs Ambient temperature 0.6 0.55 0.5 0.45 0.4 0.35 0.3 - Ambient temperature (°C) BAT Pin Output Voltage vs Ambient temperature 4.15 4.14 4.13 4.12 4.11 4.10 4.09 4.08 4.07 4.06 4.05 - Ambient temperature (°C) VCNT Voltage vs ICNT Current 0.5 0.4 0.3 0.2 0 ICNT Current (mA) OSC Oscillation Cycle C=0.022µF ...