bq24753 Datasheet | Texas Instruments

NOT REMENDED FOR NEW DESIGNS bq24753 SLUS885B - DECEMBER 2008 - REVISED MARCH 2009 Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector Features - 2 NMOS-NMOS Synchronous Buck Converter with 300 k Hz Frequency and >95% Efficiency APPLICATIONS - Notebook and Ultra-Mobile puters - Portable Data Capture Terminals - 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle - Portable Printers - Medical Diagnostics Equipment - High-Accuracy Voltage and Current Regulation - ±0.5% Charge Voltage Accuracy - Battery Bay Chargers - Battery Back-up Systems - ±3% Charge Current Accuracy - ±3% Adapter Current Accuracy - ±2% Input Current Sense Amp Accuracy - Integration - Automatic System Power Selection From AC/DC Adapter or Battery - Internal Loop pensation - Internal Soft Start - Safety DESCRIPTION The bq24753 is a high-efficiency, synchronous battery charger with integrated pensation and system power selector logic, offering low ponent count for space-constrained multi-chemistry battery charging applications. Ratiometric charge current and voltage programming allows for high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs. - Programmable Input Overvoltage Protection (OVP) - Dynamic Power Management...