With the recent introduction of BQ24610/7, a highly integrated Li-ion/polymer switch-mode charge controller, Texas Instruments Inc. continues its pioneering efforts in switch-mode charging.
Talking to
EDN Asia, Barry Papermaster, Senior Marketing Manager of the Power Management Semiconductor business at TI, said, “With mobility, portability, and miniaturization becoming the trend, charging has become a very critical issue. Most power supplies are efficient at high power, but not efficient at low power. Switch-mode chargers are a solution to this problem.”
Offering a constant-frequency synchronous switching PWM controller with high accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation and charge status monitoring, the BQ24610/7 charges the battery in three phases: preconditioning, constant current, and constant voltage. The user can select a current level at which the charge is terminated. If the battery voltage falls below an internal threshold, the BQ24610/7 restarts the charge cycle automatically, and when the input voltage falls below the battery voltage, it enters into a low-quiescent current sleep mode. The safety backup is provided by a programmable charge timer.
Papermaster estimates the global size of the charger market at $600 million.
Texas Instruments
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