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 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t prior notification.  The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications. MITSUMI One-cell li-ion/li-polymer battery protection IC One-cell li-ion/li-polymer battery protection IC MM3638 Series Outline MM3638 series are protection IC for lithium-ion and lithium-polymer battery. MM3638 protects the battery pack from overcharge, overdischarge, and overcurrent, etc. by controlling FET SW. In the One-cell battery pack, on resistance of the FET SW has been used for overcurrent detection. MM3638 realize overcurrent protection with high accuracy and with no temperature dependence by using a chip resistor. Features (Unless otherwise specifi ed, Topr=+25°C) (1) Range and accuracy of detection / release voltage Overcharge detection voltage 3.6V to 5.0V, 5mV steps Accuracy±20mV Accuracy±25mV (Topr=−20 to +60°C) Overdischarge detection voltage 2.0V to 3.0V, 50mV steps Accuracy±35mV Discharging overcurrent detection voltage 20mV to 65mV, 1mV steps Accuracy±15% 65mV to 300mV, 5mV steps Accuracy±10mV Charging overcurrent detection voltage −65mV to −20mV, 1mV steps Accuracy±15% −300mV to −65mV, 5mV steps Accuracy±10mV Short detection voltage 0.45V/0.6V Accuracy±150mV 0.9V Accuracy±300mV (2) Release condition from each protection mode Overcharge release condition Charger open release "VDD < Overcharge release voltage" and "Connecting load (V− > 0.4V)" Voltage release When charger is connected (V− < 0.2V) : "VDD < Overcharge release voltage" When charger is opened (V− > 0.4V) : "VDD < Overcharge detection voltage" Overdischarge release condition Charger connected release "VDD > Overdischarge release voltage" and "Connecting charger (V− < 0.2V)" Voltage release When charger is connected (V− < 0.2V) : "VDD > Overdischarge release voltage" When charger is opened (V− > 0.4V) : "VDD > Overdischarge detection voltage" Discharging overcurrent release condition "Removing load (V− < 0.2V)" Charging overcurrent release condition "Connecting load (V− > 0.4V)" (3) Range of detection delay time Overcharge detection delay time Selection from 0.25s, 0.5s, 1.0s Overdischarge detection delay time Selection from 20ms, 24ms, 96ms, 125ms Discharging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms Charging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms Short detection delay time Selection from 250µs, 400µs

 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t prior notification.  The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications. MITSUMI One-cell li-ion/li-polymer battery protection IC Pin Assignment Top view Pin No. FunctionSSON-6J SON-6C 564 13 2 VDDCS VSS DOUTV- COUT VDDCS VSS DOUTV- COUT

1 Input terminal connected to charger

2 Output of overcharge detection

(Output type is CMOS)

3 Output of overdischarge detection

(Output type is CMOS)

4 VSS terminal (Connected to ground)

5 VDD terminal

(Connected to IC substrait)

6 Input of overcurrent detection

(4) 0V battery charge function Selection from "Prohibition" or "Permission" (5) Low current consumption Normal mode Typ. 3.0µA, Max. 6.0µA Stand-by mode Max. 0.1µA (For "Charger connection release" the overdischarge release condition.) Max. 0.6µA (For "Voltage release" the overdischarge release condition.) (6) Absolute maximum ratings VDD pin VSS−0.3V to +12V COUT pin and V- pin VDD−28V to VDD+0.3V DOUT pin and CS pin VSS−0.3V to VDD+0.3V Storage temperature −55°C to +125°C Operation temperature −40°C to +85°C

 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t prior notification.  The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications. MITSUMI One-cell li-ion/li-polymer battery protection IC Please inquire to us, if you request a rank other than the above. 1234567 Overdischarge detection delay time tVdet2 125ms 96ms 125ms 125ms 20ms 20ms 20ms Discharging overcurrent detection delay time tVdet3 8ms 12ms 16ms 48ms 12ms 8ms 16ms Charging overcurrent detection delay time tVdet4 8ms 6ms 8ms 8ms 16ms 8ms 8ms Short detection delay time tshort 250µs 400µs 250µs 250µs 250µs 250µs 250µs *1 Delay time combination Selection Guide (SSON-6J ··· 3,000pcs/Reel)(SON-6C ··· 5,000pcs/Reel) Product name Package Detection / Release voltage 0V battery charge function Delay time combination Overcharge detection voltage [V] Overcharge release voltage [V] Overdischarge detection voltage[V] Overdischarge release voltage [V] Discharging overcurrent detection voltage [mV] Charging overcurrent detection voltage [mV] Vdet1 Vrel1 Vdet2 Vrel2 Vdet3 Vdet4

 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t prior notification.  The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications. MITSUMI One-cell li-ion/li-polymer battery protection IC VD4 VDD CS 330 0.1µF VSS V−COUTDOUT 0.1µF 10m Pack− Pack+ 0.1µFC4 VD1 VD2 VD3 Oscillator Counter ShortDelay Logic Circuit Logic Circuit Level Shift Overcharge Overdischarge Discharging Overcurrent Charging Overcurrent 2.2k

  • R1 and C1 stabilize a supply voltage ripple. However, the detection voltage rises by the current of penetration in IC of the voltage detection when R1 is enlarged, and the value of R1 is adjusted to 1k or less. Moreover, adjust the value of C1 to 0.01µF or more to do the stability operation, please.
  • R1 and R2 resistors are current limit resistance if a charger is connected reversibly or a high-voltage charger that exceeds the absolute maximum rating is connected. R1 and R2 may cause a power consumption will be over rating of power dissipation, therefore the \R1+R2\ should be more than 1k . Moreover, if R2 is too enlarged, the charger connection release cannot be occasionally done after the overdischarge is detected, so adjust the value of R2 to 10k or less, please.
  • R3 is resistor to sense the discharge or charging current. R3 is shown by the following expression by discharging current IODCP , discharging overcurrent detection voltage Vdet3, charging current IOCCP , and charging overcurrent detection voltage Vdet4. IODCP=Vdet3/R3 IOCCP=Vdet4/R3 If R3 is too enlarged, the power loss increases. Moreover, the power might exceed a dissipation of resistance by the overcurrent, please select R3 according to the cell spec, after confi rming the characteristic.
  • C2, C3 and C4 capacitors have effect that the system stability about voltage ripple or imported noise. After check characteristics, decide that these capacitors should be inserted or not, where should be inserted, and capacitance value, please. Please arrange C4 near the terminal and use a few uF from tens of pF . Symbol Part Min. Typ. Max. Unit R1 Resistor 100 330 1k C1 Capacitor 0.01 0.1 1.0 µF R2 Resistor 1k 2.2k 10k R3 Sense resistor 10 m Application Circuit