SLUSFR7 August 2025 BQ24810
PRODUCTION DATA
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 Device Power Up
- 6.3.2 System Power Selection
- 6.3.3 Current and Power Monitor
- 6.3.4 Processor Hot Indication for CPU Throttling
- 6.3.5 Input Current Dynamic Power Management
- 6.3.6 Two-Level Adapter Current Limit (Peak Power Mode)
- 6.3.7 EMI Switching Frequency Adjust
- 6.3.8 Device Protections Features
- 6.4 Device Functional Modes
- 6.5 Programming
- 6.6
Register Maps
- 6.6.1 Battery-Charger Commands
- 6.6.2 Setting Charger Options
- 6.6.3 ChargeOption1 Register
- 6.6.4 ChargeOption2 Register
- 6.6.5 ChargeOption3 Register
- 6.6.6 ChargeOption4 Register
- 6.6.7 ProchotOption0 Register
- 6.6.8 ProchotOption1 Register
- 6.6.9 ProchotStatus Register
- 6.6.10 Charge Current Register
- 6.6.11 Charge Voltage Register
- 6.6.12 Discharge Current Register
- 6.6.13 Minimum System Voltage Register
- 6.6.14 Input Current Register
- 6.6.15 Register Exceptions
-
7 Application and Implementation
- 7.1 Application Information
- 7.2
Typical Applications
- 7.2.1
Typical System Schematic
- 7.2.1.1 Design Requirements
- 7.2.1.2
Detailed Design Procedure
- 7.2.1.2.1 Adapter Current Sense Filter
- 7.2.1.2.2 Negative Output Voltage Protection
- 7.2.1.2.3 Reverse Input Voltage Protection
- 7.2.1.2.4 Reduce Battery Quiescent Current
- 7.2.1.2.5 CIN Capacitance
- 7.2.1.2.6 L1 Inductor Selection
- 7.2.1.2.7 CBATT Capacitance
- 7.2.1.2.8 Buck Charging Internal Compensation
- 7.2.1.2.9 CSYS Capacitance
- 7.2.1.2.10 Battery Only Boost Internal Compensation
- 7.2.1.2.11 Power MOSFETs Selection
- 7.2.1.2.12 Input Filter Design
- 7.2.1.3 Application Curves
- 7.2.2 Migration from Previous Devices (Does Not Support Battery Only Boost)
- 7.2.1
Typical System Schematic
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
封裝選項
請參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RUY|28
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
6.4.1.1 Setting the Charge Current
To set the charge current, write a 16-bit ChargeCurrent() command (REG0x14) using the data format listed in Table 6-15. With 10-m? sense resistor, the BQ24810 device provides a charge current range of 128 mA to 8.128 A, with 64-mA step resolution. Upon POR, charge current is 0 A. Any conditions for ACOK low except ACOV resets the ChargeCurrent() to 0. Sending ChargeCurrent() 0 mA terminates charge. To provide secondary protection, the BQ24810 has an ILIM pin with which the user can program the maximum allowed charge current. Internal charge current limit is the lower one between the voltage set by ChargeCurrent(), and the voltage on ILIM pin. To disable this function, the user can pull ILIM above 2 V, which is the maximum charge current regulation limit. Setting REG0x38[7] to 0 will also disable the ILIM pin charge current limiting so that only the REG0x14 value is used. When ILIM is below 60 mV, battery charging is disabled. The preferred charge current limit can be derived from the below equation:
The SRP and SRN pins are used to sense RSR with default value of 10 mΩ. However, resistors of other values can also be used. The actual current is scaled by the ratio of 10 mΩ and RSR. For example, the charge current setting code of 4096mA on 10 mΩ becomes 2048mA if sense resistor is 20 mΩ. For a larger sense resistor, a larger sense voltage is given, and a higher regulation accuracy; but, at the expense of higher conduction loss. If current sensing resistor value is too high, it may trigger an overcurrent protection threshold because the current ripple voltage is too high. In such a case, either a higher inductance value or a lower current sensing resistor value should be used to limit the current ripple voltage level. A current sensing resistor value no more than 20 mΩ is suggested.