ZHCSNY0B May 2020 – January 2023 BQ25798
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 說明（續）
- 6 Device Comparison
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Device Power-On-Reset
- 9.3.2 PROG Pin Configuration
- 9.3.3 Device Power Up from Battery without Input Source
- 9.3.4 Device Power Up from Input Source
- 9.3.5 Dual-Input Power Mux
- 9.3.6 Buck-Boost Converter Operation
- 9.3.7 USB On-The-Go (OTG)
- 9.3.8 Power Path Management
- 9.3.9 Battery Charging Management
- 9.3.10 Integrated 16-Bit ADC for Monitoring
- 9.3.11 Status Outputs ( STAT, and INT)
- 9.3.12 Ship FET Control
- 9.3.13
Protections
- 9.3.13.1
Voltage and Current Monitoring
- 9.3.13.1.1 VAC Over-voltage Protection (VAC_OVP)
- 9.3.13.1.2 VBUS Over-voltage Protection (VBUS_OVP)
- 9.3.13.1.3 VBUS Under-voltage Protection (POORSRC)
- 9.3.13.1.4 System Over-voltage Protection (VSYS_OVP)
- 9.3.13.1.5 System Short Protection (VSYS_SHORT)
- 9.3.13.1.6 Battery Over-voltage Protection (VBAT_OVP)
- 9.3.13.1.7 Battery Over-current Protection (IBAT_OCP)
- 9.3.13.1.8 Input Over-current Protection (IBUS_OCP)
- 9.3.13.1.9 OTG Over-voltage Protection (OTG_OVP)
- 9.3.13.1.10 OTG Under-voltage Protection (OTG_UVP)
- 9.3.13.2 Thermal Regulation and Thermal Shutdown
- 9.3.13.1
Voltage and Current Monitoring
- 9.3.14 Serial Interface
- 9.4 Device Functional Modes
- 9.5 Register Map
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
9.3.9.5.2 Cold/Hot Temperature Window in OTG Mode
For battery protection during OTG mode, the device monitors the battery temperature to be within the VBCOLD to VBHOT thresholds. When RT1 is 5.24 KΩ and RT2 is 31.31 KΩ, TBCOLD default is -10°C and TBHOT default is 60°C. When the temperature is outside of this range, OTG mode is suspended, the converter stops switching. The charger waits in OTG mode (EN_OTG = 1). In addition, the VBUS_STAT bits are set to 000 and the corresponding TS_COLD_STAT or TS_HOT_STAT is reported. Once temperature returns to the normal temperature range, OTG mode is recovered and TS stauts bit is cleared. During TS fault, REGN remains on.
Figure 9-13 TS Pin Thermistor Sense
Threshold in OTG Mode