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
請參考 PDF 數據表獲取器件具體的封裝圖。
機械數據 (封裝 | 引腳)
- RRV|36
散熱焊盤機械數據 (封裝 | 引腳)
- RRV|36
訂購信息
3 Description
BQ25858-Q1, BQ25858B-Q1 are automotive grade, wide input voltage, bidirectional switched-mode buck-boost controllers. The devices offer high-efficiency regulation over a wide voltage range with output CC-CV control. The devices integrate all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the devices draw power from the output supply and regulate the input terminal voltage with an added constant current loop for protection.
Besides the I2C host-controlled mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. By default, the device is programmed to provide 5V output, and the target output voltage can be adjusted via the VOUT_REG register bits.
| PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) | BODY SIZE (NOM) |
|---|---|---|---|
| BQ25858-Q1 | RRV (VQFN 36) | 5.0mm × 6.0mm | 5.0mm × 6.0mm |
| BQ25858B-Q1 |
Simplified Schematic