SLUS894B January 2010 – July 2015
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Battery Voltage Regulation
- 8.3.2 Battery Current Regulation
- 8.3.3 Precharge
- 8.3.4 Input Adapter Current Regulation
- 8.3.5 Charge Termination, Recharge, and Safety Timer
- 8.3.6 Power Up
- 8.3.7 Enable and Disable Charging
- 8.3.8 System Power Selector
- 8.3.9 Automatic Internal Soft-Start Charger Current
- 8.3.10 Converter Operation
- 8.3.11 Synchronous and Non-Synchronous Operation
- 8.3.12 Cycle-By-Cycle Charge Undercurrent Protection
- 8.3.13 Input Overvoltage Protection (ACOV)
- 8.3.14 Input Undervoltage Lockout (UVLO)
- 8.3.15 Battery Overvoltage Protection
- 8.3.16 Cycle-By-Cycle Charge Overcurrent Protection
- 8.3.17 Thermal Shutdown Protection
- 8.3.18 Temperature Qualification
- 8.3.19 Timer Fault Recovery
- 8.3.20 PG Output
- 8.3.21 CE (Charge Enable)
- 8.3.22 Charge Status Outputs
- 8.3.23 Battery Detection
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGE|24
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGE|24
訂購(gòu)信息
1 Features
- 300-kHz NMOS-NMOS Synchronous Buck Converter
- Stand-Alone Charger Specifically for Lithium Phosphate
- 5-V–28-V VCC Input Operating Range, Supports 1–7 Battery Cells
- High-Accuracy Voltage and Current Regulation
- ±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 (DPM)
- Safety Protection
- Input Overvoltage Protection
- Battery Thermistor Sense Suspend Charge at Hot/Cold and Automatically ICHARGE/8 at Hot/Cold or Warm/Cool
- 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 99.95% Max. Effective Duty Cycle
- 24-Pin 4-mm × 4-mm QFN Package
- Energy Star Low Quiescent Current Iq
- < 15-μA Off-State Battery Discharge Current
- < 1.5-mA Off-State Input Quiescent Current
2 Applications
- Power Tool and Portable Equipment
- Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Netbook, Mobile Internet Device, and Ultra-Mobile PC
3 Description
The bq24630 is a highly integrated lithium phosphate 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 bq24630 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 bq24630 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.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| bq24630 | VQFN (24) | 4.00 mm × 4.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
4 Revision History
Changes from A Revision (October 2011) to B Revision
- Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
- Added text, equations and illustrations from Inductor Selection to PCB LayoutGo
Changes from * Revision (January 2010) to A Revision
- Changed descriptions for PH and BTST pinsGo
- Changed Equation 1 From: R1/R2 To: R2/R1Go
- Changed Equation 1Go
- Changed Equation 15Go