آر اف (فرکانس رادیویی) و بی‌سیم آی سی‌ فرستنده‌گیرنده آر اف

Product Attributes

Introduction

The bq2461x device is a highly integrated, Japan Electronic Information Technology Association (JEITA) guideline-compatible, Li-ion or Li-polymer switched-mode battery charge controller. The device offers 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 bq2461x charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The bq2461x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low quiescent current sleep mode when the input voltage falls below the battery voltage.

Features

• ±0.5% Charge Voltage Accuracy
• ±3% Charge Current Accuracy
• ±3% Adapter Current Accuracy
• Integration
• Automatic System Power Selection From Adapter or Battery
• Internal Loop Compensation
• Internal Soft-Start
• Dynamic Power Management
• Safety Protection
• Input Overvoltage Protection
• Battery Detection
• Reverse Protection
• Input FET
• Programmable Safety Timer
• Charge Overcurrent Protection
• Battery Short Protection
• Battery Overvoltage Protection
• Thermal Shutdown
• Status Outputs
• Adapter Present
• Charger Operation Status
• Charge Enable Pin
• 6-V Gate Drive for Synchronous Buck Converter
• 30-ns Driver Dead-Time and 99.5% Maximum Effective Duty Cycle
• 24-Pin, 4-mm × 4-mm QFN Package
• Energy Star Low Quiescent Current Io
• <15μA Off-State Battery Discharge Current
• <1.5-mA Off-State Input Quiescent Current

Applications

• Netbooks, Mobile Internet Devices, and UltraMobile PCs
• Industrial and Medical Equipment
• Personal Digital Assistants
• Handheld Terminals Portable Equipment