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Protection for Lithium-Ion Batteries

MM3766 Series

Outline

The MM3766 series are protection IC using high voltage CMOS process for overcharge, overdischarge and overcurrent protection
of the rechargeable Lithium-ion or Lithium-polymer battery. The overcharge, overdischarge, discharging rechargeable two cells
Lithium-ion or Lithium-polymer battery can be detected. Each of these IC composed of four voltage detectors, short detection circuit,
reference voltage sources, oscillator, counter circuit and logical circuits.

Product Series

For 2-cells

Features

(1) Range and accuracy of detection and release voltage
 ● Overcharge detection voltage 3.6V to 4.5V, 5mV Step ±15mV
 ● Overcharge release voltage 3.4V to 4.5V, 50mV Step ±30mV
 ● Overdischarge detection voltage 2.0V to 3.0V, 50mV Step ±35mV
 ● Overdischarge release voltage 2.0V to 3.5V, 50mV Step ±50mV
 ● Discharging overcurrent detection voltage 1 20mV to 300mV, 5mV Step  ±ΔV ※1
 ● Discharging overcurrent detection voltage 2 40mV to 600mV, 10mV Step ±ΔV ※1
 ● Short detection voltage Selection from 0.7V, 0.8V, 0.9V ±300mV
 ● Charging overcurrent detection voltage -300mV to -40mV, 5mV Step ±ΔV ※1

(2) Range of detection delay time
 ● Overcharge detection delay time Selection from 256ms to 4.6s
 ● Overdischarge detection delay time Selection from 8ms to 2s
 ● Discharging overcurrent detection delay time 1 Selection from 8ms to 512ms
 ● Discharging overcurrent detection delay time 2 Selection from 0.5ms to 6ms
 ● Charging overcurrent detection delay time Selection from 4ms to 64ms
 ● Short detection delay time 300usec fixed

(3) 0V battery Charge functionSelectable "Permission" or "inhibition"

(4) Current consumption
 ● Current consumption of VDD pin(Vcell=4.0V) Typ. 4.0uA Max. 8.0uA
 ● Current consumption of VDD pin(Vcell=2.0V) Max. 0.1uA(In case Overdischarge latch function Enable.)
                                        Max. 2.5uA(In case Overdischarge latch function Disable.)
 ● Current consumption of VBL pin (Vcell=4.0V) Min. -0.3uA, Max. 0.3uA

*1 Accuracy of overcurrent detection voltage

Specifications

Product
name
Package 0V battery
charge
function
Overcharge release function Overdischarge release function Discharging overcurrent release function Overcharge detection voltage
[V]
Overcharge release voltage
[V]
Overdischarge detection voltage
[V]
Overdischarge release
voltage
[V]
Discharging overcurrent detection voltage1
[V]
Charging overcurrent detection voltage
[V]
Short detection voltage
[V]
Overcharge detection delay time
[s]
Overcharge release delay time
[ms]
Overdischarge detection
delay time
[ms]
Overdischarge release
delay time
[ms]
Discharging overcurrent detection
delay time 1
[ms]
Discharging overcurrent release
delay time
[ms]
Charging
overcurrent
detection
delay time
[ms]
Charging overcurrent release delay time
[ms]
Short detection
delay time
[ms]

Package

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Associated Data

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