bq2054 is a lithium battery fast charge IC produced by bq company, which can safely charge lithium batteries. It has the functions of voltage regulation current limited charging, fast charging terminated by selectable minimum current, safety backup termination on maximum time, charging continuously qualified by temperature and voltage limits, pulse width modulation control ideal for high efficiency switch mode power conversion, direct LED control outputs display charge status and fault conditions.
The bq2054 is a Lithium Ion Fast-Charge IC designed to optimize charging of lithium ion (Li-Ion) chemistry batteries. It utilizes a flexible pulse-width modulation regulator to control voltage and current during the charging process, with the regulator frequency set by an external capacitor. The device includes safety features such as temperature and voltage limit monitoring to inhibit charging if conditions are outside configured limits.
| Product Type | Lithium Ion Fast-Charge IC |
|---|---|
| Package Type | 16-Pin Narrow DIP or SOIC |
| Power Supply Voltage | 5.0V +/- 10% |
| Charge Termination Condition | Current falls below user-selectable limit |
| Safety Backup Termination | Maximum time |
| Hold-Off Period Duration | 1.33 +/- 0.19 seconds |
The bq2054 enters the Charge Pending state and waits until the battery temperature is within the allowed range, indicated by LED3 flashing.
The regulator frequency is set by an external capacitor connected to the TPWM pin.