MC33349

The MC33349 is designed as a monolithic lithium battery protection circuit that is to enhance the useful operating life of a one cell rechargeable battery pack. MC33349 features consist of internally trimmed charge and discharge voltage limits, charge and discharge current limit detection, and a virtually zero current sleepmode state when the cell is discharged.

MC33349 has six features. (1)Internally trimmed charge and discharge voltage limits. (2)Charge and discharge current limit detection. (3)Virtually zero current sleepmode state when cells are discharged. (4)Dedicated for one cell applications. (5)Minimum components for inclusion within the battery pack. (6)Available in a low profile surface mount package. Those are all the main features.

Some absolute maximum ratings of MC33349 have been concluded into several points as follow. (1)Its discharge gate drive output (pin 1) to GND (pin 6) would be from 5.0V to -1.0V. (2)Its charge gate drive common/current limit (pin 2) to Vcell (pin 5) would be from 1.0V to -18V. (3)Its charge gate drive output (pin 3) to Vcell (pin 5) would be from 1.0V to -18V. (4)Its overvoltage delay capacitor (pin 4) to GND (pin 6) would be 5.0V to -1.0V. (5)Its cell voltage (pin 5) to GND (pin 6) would be 5.0V to -1.0V. (6)Its operating junction temperature range would be from -40°C to 85°C. (7)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 MC33349 are concluded as follow. (1)Its cell charging cutoff (pin 5 to pin 6) overvoltage threshold, Vcell increasing -1,-3 suffix would be typ 4.35V and -2, -4 suffix would be typ 4.25V. (2)Its over voltage hysteresis Vcell decreasing would be typ 200mV. (3)Its input bias current during cell voltage sample (pin 5) would be typ 20uA. And so on. If you have any question or suggestion or want to know more information about MC33349 please contact us for details. Thank you!