Description
The bq24730 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end thatinterfaces to the system power management micro-controller through a hardware interface. The dynamic power management (DPM) function modifies the charge current depending on system load conditions, avoiding ac adapter overload. High accuracycurrent sense amplifiers enable accurate measurement of either the charge current or the ac adapter current, allowing termination of nonsmart packs and monitoring of overall system power.The input current sense amplifier can be enabled with no adapterto sense battery discharge current. Integrated features such as charger soft start, charge overcurrent protection, and IC temperature monitoring provide a second level of protection, in addition to pack and system protection functions.
- NMOS-NMOS Synchronous Buck Converter With Fixed 300 kHz Frequency
- Enhanced 6-V Drive Supply Voltage and 99.5% Max Duty Cycle
- 0.4% Charge Voltage Regulation Accuracy
- 4% Charge Current Regulation Accuracy
- 4% Adapter Current Regulation Accuracy Dynamic Power Management (DPM)
- AC Adapter Present
- Low Battery Indicator
- DPM Regulation Loop Active Indicator
- Portable Notebook Computers
- Portable DVD Players
- Webpads, PC Tablets
