MM3684 Series

Lithium-Ion Battery 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 overcurrent, charging overcurrent, and short protection of the rechargeable 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.

Outline

The MM3684 series are protection IC using high voltage CMOS process for overcharge, secondary overcharge, overdischarge, overcurrent and temperature protection of the rechargeable Lithium-ion or Lithium-polymer battery. The overcharge, overdischarge, discharging overcurrent, charging overcurrent, temperature of the rechargeable 3 to 5 cells Lithium-ion or Lithium-polymer battery can be detected. The internal circuit of IC is composed by the voltage detector, the reference voltage source, delay time control circuit, and the logical circuit, etc.

For 3 to 5cells
1) Range and accuracy of detection/release voltage
●Overcharge detection voltage 1 (0V output) 3.6V to 4.5V, 5mV steps Accuracy ±25mV
●Overcharge release voltage 1 (0V output) 3.4V to 4.5V, 50mV steps Accuracy ±50mV
●Overcharge detection voltage 2 (PF output) 3.6V to 4.5V, 5mV steps Accuracy ±25mV
●Overdischarge detection voltage 1 2.0V to 3.0V, 50mV steps Accuracy ±80mV
●Overdischarge detection voltage 2 2.0V to 3.0V, 50mV steps Accuracy ±100mV
●Overdischarge release voltage 2.0V to 3.5V, 50mV steps Accuracy ±100mV
●Discharging overcurrent detection voltage 1 30mV to 300mV, 5mV steps Accuracy ±15%
●Discharging overcurrent detection voltage 2 Twice or 4 times of discharging overcurrent 1 Accuracy ±20%
●Short detection voltage 4 or 8 times of discharging overcurrent 1 Accuracy ±100mV
●Charging overcurrent detect voltage -300mV to -20mV, 5mV steps Accuracy ±10mV

2) Range of detection delay time
●Overcharge detection delay time 1 Setting by a capacitor of COV pin. Accuracy ±50%
●Overcharge release delay time 1 Setting by a capacitor of COV pin. Accuracy ±50%
●Overcharge detection delay time 2 Setting by a capacitor of CPF pin. Accuracy ±50%
●Overdischarge detection delay time Setting by a capacitor of CUV pin. Accuracy ±50%
●Overdischarge release delay time Setting by a capacitor of CUV pin. Accuracy ±50%
●Discharging overcurrent detection delay time 1 Setting by a capacitor of DCOC pin. Accuracy ±50%
●Discharging overcurrent detection delay time 2 Setting by a capacitor of DCOC pin. Accuracy ±50%
●Short detection delay time Selection from 100µs, 200µs, 300µs Accuracy -50%, +100%
●Discharging overcurrent release delay time Setting by a capacitor of DCOC pin. Accuracy ±50%
●Charging overcurrent detection delay time Setting by a capacitor of CCOC pin. Accuracy ±50%
●Charging overcurrent release delay time Setting by a capacitor of CCOC pin. Accuracy ±50%
●Temperature protection detection ON time Setting by a capacitor of CIOT pin. Accuracy ±50%
●Temperature protection detection OFF time Setting by a capacitor of CIOT pin. Accuracy ±50%

3) The setting for three cell , for four cell , and for fi ve cell protection can be set with the SEL1,2 pin.

4) Threshold of over-discharge detection can be switched to over-discharge detection voltage 1, 2 at the DVSEL terminal.

5) 0V battery charge function Selection from ”Prohibition” or ”Permission”

6) Power save mode built-in

7) Achieve low consumption by making the temperature detection for regulator and temperature detection circuit to intermittent operation

8) Low current consumption
●VDD pin current consumption (Vcell=4.3V) Typ. 15.0µA, Max. 25.0µA
●VDD pin current consumption (Vcell=3.5V) Typ. 10.0µA, Max. 20.0µA
●VDD pin current consumption at power save(Vcell=1.8V) Typ. 3.0µA, Max. 6.0µA
●V5 pin current consumption (Vcell=4.3V) Typ. 1.0µA, Max. 2.0µA
●V5 pin current consumption (Vcell=3.5V) Typ. 0.8µA, Max. 1.5µA
●V5 pin current consumption (Vcell=1.8V) Max. 0.5µA