JAJSEO7I
October 2008 – December 2017
TPS23754
,
TPS23754-1
,
TPS23756
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
Device Images
TPS23754を使用する高効率コンバータ
4
改訂履歴
5
概要(続き)
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Electrical Characteristics: PoE and Control
7.7
Switching Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
APD
8.3.2
BLNK
8.3.3
CLS
8.3.4
Current Sense (CS)
8.3.5
Control (CTL)
8.3.6
Detection and Enable (DEN)
8.3.7
DT
8.3.8
Frequency and Synchronization (FRS)
8.3.9
GATE
8.3.10
GAT2
8.3.11
PPD
8.3.12
RTN, ARTN, COM
8.3.13
T2P
8.3.14
VB
8.3.15
VC
8.3.16
VDD
8.3.17
VDD1
8.3.18
VSS
8.3.19
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 Converter Operation
8.4.1.8
PD Hotswap Operation
8.4.1.9
Converter Controller Features
8.4.1.10
Bootstrap Topology
8.4.1.11
Current Slope Compensation and Current Limit
8.4.1.12
Blanking – RBLNK
8.4.1.13
Dead Time
8.4.1.14
FRS and Synchronization
8.4.1.15
T2P, Start-Up, and Power Management
8.4.1.16
Thermal Shutdown
8.4.1.17
Adapter ORing
8.4.1.18
PPD ORing Features
8.4.1.19
Using DEN to Disable PoE
8.4.1.20
ORing Challenges
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
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
Dead Time Resistor, RDT
9.2.2.7
Switching Transformer Considerations and RVC
9.2.2.8
Special Switching MOSFET Considerations
9.2.2.9
Thermal Considerations and OTSD
9.2.2.10
APD Pin Divider Network, RAPD1, RAPD2
9.2.2.11
PPD Pin Divider Network, RPPD1, RPPD2
9.2.2.12
Setting Frequency (RFRS) and Synchronization
9.2.2.13
Current Slope Compensation
9.2.2.14
Blanking Period, RBLNK
9.2.2.15
Estimating Bias Supply Requirements and CVC
9.2.2.16
T2P Pin Interface
9.2.2.17
Advanced ORing Techniques
9.2.2.18
Soft Start
9.2.2.19
Frequency Dithering for Conducted Emissions Control
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
11.3
ESD
12
デバイスおよびドキュメントのサポート
12.1
ドキュメントのサポート
12.1.1
関連資料
12.2
コミュニティ・リソース
12.3
商標
12.4
静電気放電に関する注意事項
12.5
Glossary
13
メカニカル、パッケージ、および注文情報
9.2
Typical Application
Figure 27.
Driven Synchronous Flyback