BQ24105RHLR

Product Summary

The BQ24105RHLR is a highly integrated Li-ion and Li-polymer switch-mode charge management device targeted at a wide range of portable applications. The BQ24105RHLR offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced QFN package. The system-controlled version provides additional inputs for full charge management under system control. The BQ24105RHLR charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The BQ24105RHLR automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The BQ24105RHLR automatically enters sleep mode when VCC supply is removed.

Parametrics

BQ24105RHLR absolute maximum ratings: (1)Output current (average) OUT 2.2 A; (2)TA Operating free-air temperature range –40℃ to 85℃; (3)TJ Junction temperature range –40℃ to 125℃; (4)Tstg Storage temperature –65℃ to 150℃; (5)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300℃; (6)Supply voltage range (with respect to VSS) IN, VCC 20 V; (7)Voltage difference between SNS and BAT inputs (VSNS - VBAT) ±1 V; (8)Output sink STAT1, STAT2, PG 10 mA.

Features

BQ24105RHLR features: (1)Ideal For Highly Efficient Charger Designs For Single-, Two- or Three-Cell Li-Ion and Li-Polymer; (2)Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz With 0% to 100% Duty Cycle; (3)ntegrated Power FETs For Up To 2-A Charge Rate; (4)High-Accuracy Voltage and Current Regulation; (5)Available In Both Stand-Alone (Built-In Charge Management and Control) and System-Controlled (Under System Command) Versions; (6)Status Outputs For LED or Host Processor Interface Indicates Charge-In-Progress, Charge Completion, Fault, and AC-Adapter Present Conditions; (7)20-V Maximum Voltage Rating on IN and OUT Pins; (8)High-Side Current Sensing; (9)Optional Battery Temperature Monitoring; (10)Automatic Sleep Mode for Low Power Consumption; (11)System-Controlled Version Can Be Used In; (12)NiMH and NiCd Applications; (13)Uses Ceramic Capacitors; (14)Reverse Leakage Protection Prevents Battery Drainage; (15)Thermal Shutdown and Protection; (16)Built-In Battery Detection.

Diagrams