SLUSFH4A March 2025 – July 2025 BQ25858-Q1 , BQ25858B-Q1
PRODUCTION DATA
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Device Comparison
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Device Power-On-Reset
- 7.3.2 Device Power-Up From Battery Without Input Source
- 7.3.3 Device Power Up From Input Source
- 7.3.4 Power Management
- 7.3.5 Bidirectional Power Flow and Programmability
- 7.3.6 Switching Frequency Dithering Feature
- 7.3.7 Integrated 16-Bit ADC for Monitoring
- 7.3.8 Status Outputs (PG, STAT and INT)
- 7.3.9
Protections
- 7.3.9.1
Voltage and Current Monitoring
- 7.3.9.1.1 VAC Over-voltage Protection (VAC_OVP)
- 7.3.9.1.2 VAC Under-voltage Protection (VAC_UVP)
- 7.3.9.1.3 Reverse Mode Over-voltage Protection (REV_OVP)
- 7.3.9.1.4 Reverse Mode Under-voltage Protection (REV_UVP)
- 7.3.9.1.5 DRV_SUP Under-voltage and Over-voltage Protection (DRV_OKZ)
- 7.3.9.1.6 REGN Under-voltage Protection (REGN_OKZ)
- 7.3.9.2 Thermal Shutdown (TSHUT)
- 7.3.9.1
Voltage and Current Monitoring
- 7.3.10 Serial Interface
- 7.4 Device Functional Modes
- 7.5 BQ25858-Q1/858B-Q1 Registers
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1
Typical Application (Buck-Boost configuration)
- 8.2.1.1 Design Requirements
- 8.2.1.2
Detailed Design Procedure
- 8.2.1.2.1 ACUV / ACOV Input Voltage Operating Window Programming
- 8.2.1.2.2 Switching Frequency Selection
- 8.2.1.2.3 Inductor Selection
- 8.2.1.2.4 Input (VAC) Capacitor
- 8.2.1.2.5 Output (VBAT) Capacitor
- 8.2.1.2.6 Sense Resistor (RAC_SNS and RBAT_SNS) and Current Programming
- 8.2.1.2.7 Converter Fast Transient Response
- 8.2.1.3 Application Curves
- 8.2.2 Typical Application (Buck-only configuration)
- 8.2.1
Typical Application (Buck-Boost configuration)
- 8.3 Power Supply Recommendations
- 8.4 Layout
- 9 Device and Documentation Support
- 10Revision History
- 11Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
請(qǐng)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)
- RRV|36
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RRV|36
訂購信息
7.3.10.2 START and STOP Conditions
All transactions begin with a START (S) and are terminated with a STOP (P). A HIGH to LOW transition on the SDA line while SCL is HIGH defines a START condition. A LOW to HIGH transition on the SDA line when the SCL is HIGH defines a STOP condition.
START and STOP conditions are always generated by the controller. The bus is considered busy after the START condition, and free after the STOP condition. When timeout condition is met, for example START condition is active for more than 2 seconds and there is no STOP condition triggered, the I2C communication will automatically reset and communication lines are free for another transmission.
Figure 7-8 START and STOP Conditions on the I2C Bus