R5440N201A

The R5440N201A is designed as a protection IC for charges of 2 serial Ni-Cd/Ni-MH batteries by CMOS process. For example, despite a charger is exclusively used for Ni-Cd or NiMH rechargeable batteries, in case that a user would try to charge Al-Mn batteries, it can detect over-voltage and halt a charger current. When the charger must charge over-discharge cells, charger current is controlled with pulse by way of a switching controller in it, therefore stress against cells can be reduced.

The R5440N201A has six features. (1)Low supply current. (2)High accuract detector threshold. (3)Variety of detector threshold. (4)Built-in output delay circuit of over-voltage detectors. (5)2 modes exist. (6)Small package. Those are all the main features.

Some absolute maximum ratings of R5440N201A have been concluded into several points as follow. (1)Its supply voltage would be from -0.3V to 12V. (2)Its input voltage would be from -0.3V to Vdd+0.3V. (3)Its output voltage would be from -0.3V to Vdd+0.3V. (4)Its power dissipation would be 150mW. (5)Its operating temperature range would be from -40°C to 85°C. (6)Its storage temperature range would be from -55°C to 125°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of R5440N201A are concluded as follow. (1)Its operating input voltage would be min 1.2V and max 10V. (2)Its over-voltage threshold of cell-1 would be min 1.65V and typ 1.7V and max 1.75V. (3)Its release voltage from over voltage detection of cell-1 would be typ 1.5V and typ 1.55V and max 1.6V. (4)Its over voltage detector threshold hysteresis range of cell-1 would be min 0.05V and typ 0.15V and max 0.25V. (5)its output delay time for overvoltage detection would be min 10ms and typ 20ms and max 40ms. (6)Its low voltage detector hreshold of cell-1 would be min 0.75V and typ 0.8V and max 0.85V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!