JAJSDL7D
January 2016 – May 2021
TPS61194
PRODUCTION DATA
1
特長
2
アプリケーション
3
概要
4
Revision History
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 (1) (1)
6.6
Internal LDO Electrical Characteristics
6.7
Protection Electrical Characteristics
6.8
Current Sinks Electrical Characteristics
6.9
PWM Brightness Control Electrical Characteristics
6.10
Boost and SEPIC Converter Characteristics
6.11
Logic Interface Characteristics
6.12
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Integrated DC-DC Converter
7.3.2
Internal LDO
7.3.3
LED Current Sinks
7.3.3.1
Output Configuration
7.3.3.2
Current Setting
7.3.3.3
Brightness Control
7.3.4
Protection and Fault Detections
7.3.4.1
Adaptive DC-DC Voltage Control and Functionality of LED Fault Comparators
7.3.4.2
Overview of the Fault/Protection Schemes
7.4
Device Functional Modes
7.4.1
Device States
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Typical Application for 4 LED Strings
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Inductor Selection
8.2.1.2.2
Output Capacitor Selection
8.2.1.2.3
Input Capacitor Selection
8.2.1.2.4
LDO Output Capacitor
8.2.1.2.5
Diode
8.2.1.3
Application Curves
8.2.2
SEPIC Mode Application
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Inductor
8.2.2.2.2
Diode
8.2.2.2.3
Capacitor C1
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
サポート・リソース
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
1
特長
入力電圧動作範囲:4.5V~40V
4 つの高精度電流シンク
電流マッチング 1% (標準値)
チャネルごとに最大 100mA の LED ストリング電流
出力を外部で結合し、ストリングごとに大電流を供給可能
100Hz で 10,000:1 の高い調光比
LED ストリング電力用の昇圧 / SEPIC コンバータを内蔵
出力電圧:最大 45V
スイッチング周波数:300kHz~2.2MHz
スイッチング同期入力
拡散スペクトラムによる EMI の低減
広範なフォルト検出機能
フォルト出力
入力電圧 OVP および UVLO
開放および短絡 LED フォルトの検出
サーマル・シャットダウン
外付け部品数が最小限