ZHCS845A
March 2012 – July 2015
TPS2379
PRODUCTION DATA.
1
特性
2
应用
3
说明
4
修订历史记录
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
CDB Converter Disable Bar Pin Interface
8.3.2
CLS Classification
8.3.3
DEN Detection and Enable
8.3.4
GATE Auxiliary Gate Driver
8.3.4.1
External Boost Circuit (Q1, Q2, and RBLST) Considerations
8.3.5
Internal Pass MOSFET
8.3.6
T2P Type-2 PSE Indicator
8.3.7
VDD Supply Voltage
8.3.8
VSS
8.3.9
PowerPAD
8.4
Device Functional Modes
8.4.1
PoE Overview
8.4.1.1
Threshold Voltages
8.4.1.2
PoE Start-Up Sequence
8.4.1.3
Detection
8.4.1.4
Hardware Classification
8.4.1.5
Inrush and Start-up
8.4.1.6
Maintain Power Signature
8.4.1.7
Start-up and Operation
8.4.1.8
PD Hotswap Operation
8.4.1.9
CDB and T2P
8.4.1.10
Auxiliary Pass MOSFET Control
8.4.1.11
Using DEN to Disable PoE
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedures
9.2.2.1
Input Bridges and Schottky Diodes
9.2.2.2
Protection, D1
9.2.2.3
Capacitor, C1
9.2.2.4
Detection Resistor, RDEN
9.2.2.5
Classification Resistor, RCLS
9.2.2.6
External Boost Circuit
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
EMI Containment
11.2
Layout Example
11.3
Thermal Considerations and OTSD
11.4
ESD
12
器件和文档支持
12.1
文档支持
12.1.1
相关文档
12.2
社区资源
12.3
商标
12.4
静电放电警告
12.5
Glossary
13
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DDA|8
MPDS092F
散热焊盘机械数据 (封装 | 引脚)
DDA|8
PPTD058I
订购信息
zhcs845a_oa
zhcs845a_pm
7
Parameter Measurement Information
Figure 15.
PD Class State Diagram