ZHCSMX7A
August 2021 – December 2021
TPS92519-Q1
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
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Buck Converter Switching Operation
7.3.2
Switching Frequency and Adaptive On-Time Control
7.3.3
Minimum On-Time, Off-Time, and Inductor Ripple
7.3.4
Enable
7.3.5
LED Current Regulation and Error Amplifier
7.3.6
Start-up Sequence
7.3.7
Analog Dimming and Forced Continuous Conduction Mode
7.3.8
External PWM Dimming and Input Undervoltage Lockout (UVLO)
7.3.9
Shunt FET Dimming or Matrix Beam Application
7.3.10
Bias Supply
7.3.11
Bootstrap Supply
7.3.12
Faults and Diagnostics
7.3.13
Output Short Circuit Fault
7.3.14
Output Open Circuit Fault
7.3.15
Parallel Operation
7.4
Device Functional Modes
7.4.1
Power On Reset (POR)
7.4.2
Run Mode
7.4.3
Sleep Mode
8
Application and Implementation
8.1
Application Information
8.1.1
Duty Cycle Consideration
8.1.2
Switching Frequency Selection
8.1.3
LED Current Set Point
8.1.4
Inductor Selection
8.1.5
Output Capacitor Selection
8.1.6
Input Capacitor Selection
8.1.7
Bootstrap Capacitor Selection
8.1.8
Compensation Capacitor Selection
8.1.9
Input Undervoltage Protection
8.1.10
CSN Protection Diode
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Calculating Duty Cycle
8.2.2.2
Calculating Minimum On-Time and Off-Time
8.2.2.3
Minimum Switching Frequency
8.2.2.4
LED Current Set Point
8.2.2.5
Inductor Selection
8.2.2.6
Output Capacitor Selection
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
Compensation Capacitor Selection
8.2.2.9
PWM Dimming and Input Voltage Protection
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Compact Layout for EMI Reduction
10.1.1.1
Ground Plane
10.2
Layout Example
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Receiving Notification of Documentation Updates
11.3
支持资源
11.4
Trademarks
11.5
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
DAP|32
MPDS380A
散热焊盘机械数据 (封装 | 引脚)
DAP|32
PPTD363
订购信息
zhcsmx7a_oa
zhcsmx7a_pm
1
特性
符合面向汽车应用的 AEC-Q100 标准
1 级:–40°C 至 125°C 的工作环境温度范围
器件 HBM 分类等级 H1C
器件 CDM 分类等级 C2
提供功能安全
可帮助进行功能安全系统设计的文档
4.5V 至 65V 的宽输入电压范围
输出电流高达 2A,精度为 4%
自适应导通时间平均电流控制
标称开关频率
通道 1 和通道 2 为 385kHz 和 435kHz
通道 1 和通道 2 为 2MHz 和 2.1MHz
高级调光操作
精确模拟调光
支持外部 PWM 调光输入
针对外部分流调光(包括 LED 矩阵管理器)进行优化
开关逐周期过流保护
开关过热保护
LED 开路和短路故障监控和报告
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