ZHCSEP0C
October 2015 – February 2021
TPS61193
PRODUCTION DATA
1
特性
2
应用
3
说明
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 3 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
接收文档更新通知
11.4
支持资源
11.5
Trademarks
11.6
静电放电警告
11.7
术语表
12
Mechanical, Packaging, and Orderable Information
1
特性
输入电压工作范围:4.5V 至 40V
三路高精度电流阱
电流匹配度为 1%(典型值)
LED 灯串电流高达 100mA/通道
输出可在外部合并,从而提高电流能力
在 100Hz 时具有 10 000:1 的高调光比
用于 LED 灯串电源的集成升压/SEPIC 转换器
输出电压高达 45V
开关频率为 300kHz 至 2.2MHz
开关同步输入
扩频,以实现更低的 EMI
丰富的故障检测功能
故障输出
输入电压 OVP、UVLO 和 OCP
开路和短路 LED 故障检测
热关断保护
有效减少外部组件数
简化版原理图
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