ZHCS292H september 2009 – february 2021 BQ24040 , BQ24041 , BQ24045
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Device Comparison
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 CHG and PG LED Pull-up Source
- 8.4.2 Auto Start-up (BQ24041)
- 8.4.3 IN-DPM (VIN-DPM or IN-DPM)
- 8.4.4 OUT
- 8.4.5 ISET
- 8.4.6 PRE_TERM – Pre-Charge and Termination Programmable Threshold, BQ24040/5
- 8.4.7 ISET2
- 8.4.8 TS (BQ24040/5)
- 8.4.9 Termination and Timer Disable Mode (TTDM) - TS Terminal High
- 8.4.10 Timers, BQ24040 and BQ24045 only
- 8.4.11 Termination
- 8.4.12 Battery Detect Routine
- 8.4.13 Refresh Threshold
- 8.4.14 Starting a Charge on a Full Battery
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.3.4 New Charge Cycle
A new charge cycle is started when any of these events occur:
- A valid power source is applied;
- The chip is enabled/disabled using TS pin or BAT_EN;
- Exit of termination/Timer Disable Mode (TTDM);
- Detection of batter insertion;
- OUT voltage drops below the VRCH threshold.
The CHG signal is active only during the first charge cycle. Exiting TTDM or the OUT voltage falling below VRCH will not activate the CHG signal if it is already in the open-drain (off) state.
Figure 8-2 TS Battery Temperature Bias Threshold and Deglitch Timers
Figure 8-3 BQ2404x Power-Up Flow Diagram