■Overview
In recent years, the safety of batteries has been looked upon as important issue due to frequent troubles in the lithium ion batteries. In this context, there are growing safety requirements for charge control ICs as well as demands for protection ICs in the battery pack.
This charge control IC has characteristics to monitor battery temperature to control the charge current and charge voltage, and it is in compliance with the Safety Standard that will be put in force in 2011. In addition, this IC has achieved high cost performance in that it has integrated with charge FET and current sensing resistor, which are the external devices in the conventional charge control ICs, and that the reverse current protection function is added.
§ Features
1. | Integrated battery temperature monitor and battery control functions in advance preparation for the Safety Standard slated to be effective in 2011. Safety of the battery is secured by changing the full charge voltage and charge current when the battery temperature is low and high. |
2. | Can reduce parts and its installation costs thanks to the integrated charging FET and current sensing resistor. |
3. | Because of the control function integrated in the primary side, it is also possible to charge the battery highly efficiently by tracking the battery voltage in addition to the charge control. Furthermore, the heat dissipation is minimized. |
§ Main specifications
|
|
|
Recommended power supply voltage |
2.7~5.9V |
|
Consumption current |
1mA typical and 2mA maximum |
|
Input low voltage protection |
2.45V |
|
Input over voltage protection |
5.70V |
|
Battery control voltage |
4.22V±30mV (10~45°C) |
|
Battery over voltage protection |
4.35V |
|
Battery leak current |
Max. 4μA |
|
Rapid charge timer |
5.3 hours |
|
Package |
TSOP-16 |
|
External dimensions |
5.0Χ4.4Χ1.1 (Unit: mm / The size of lead section is not included) |
|
|
|