ZHCSGY7B
October 2017 – January 2018
TPS92830-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
简化原理图
4
修订历史记录
5
说明 (续)
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
Timing Requirements
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Device Bias
8.3.1.1
Power-On-Reset (POR)
8.3.1.2
Current Reference (IREF)
8.3.1.3
Low-Current Fault Mode
8.3.2
Charge Pump
8.3.2.1
Charge Pump Architecture
8.3.3
Constant-Current Driving
8.3.3.1
High-Side Current Sense
8.3.3.2
High-Side Current Driving
8.3.3.3
Gate Overdrive Voltage Protection
8.3.3.4
High-Precision Current Regulation
8.3.3.5
Parallel MOSFET Driving
8.3.4
PWM Dimming
8.3.4.1
Supply Dimming
8.3.4.2
PWM Dimming by Input
8.3.4.3
Internal Precision PWM Generator
8.3.4.4
Full Duty-Cycle Switch
8.3.5
Analog Dimming
8.3.5.1
Analog Dimming Topology
8.3.5.2
Internal High-Precision Pullup Current Source
8.3.6
Output Current Derating
8.3.6.1
Output-Current Derating Topology
8.3.7
Diagnostics and Fault
8.3.7.1
LED Short-to-GND Detection
8.3.7.2
LED Short-to-GND Auto Retry
8.3.7.3
LED Open-Circuit Detection
8.3.7.4
LED Open-Circuit Auto Retry
8.3.7.5
Dropout-Mode Diagnostics
8.3.7.6
Overtemperature Protection
8.3.7.7
FAULT Bus Output With One-Fails–All-Fail
8.3.7.8
Fault Table
8.4
Device Functional Modes
8.4.1
Undervoltage Lockout, V(IN) < V(UVLO)
8.4.2
Normal Operation (V(IN) ≥ 4.5 V, V(IN) > V(LED) + 0.5 V)
8.4.3
Low-Voltage Dropout
8.4.4
Fault Mode (Fault Is Detected)
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Typical Application for Automotive Exterior Lighting With One-Fails–All-Fail
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.3
Application Curves
9.2.2
High-Precision Dual-Brightness PWM Generation
9.2.2.1
Dual-Brightness Application
9.2.2.2
Design Requirements
9.2.2.3
Detailed Design Procedure
9.2.2.4
Application Curve
9.2.3
Driving High-Current LEDs With Parallel MOSFETs
9.2.3.1
Application Curves
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
接收文档更新通知
11.2
社区资源
11.3
商标
11.4
静电放电警告
11.5
Glossary
12
机械、封装和可订购信息
1
特性
符合 AEC-Q100 标准
器件温度等级 1:环境运行温度范围为 -40°C 至 125°C
器件人体放电模型 (HBM) 静电防护 (ESD) 分类等级 H2
器件组件充电模型 (CDM) ESD 分类等级 C4B
4.5V 至 40V 的宽电压输入范围
3 通道高侧电流驱动和检测
通道独立的电流设置
通道独立的 PWM 输入
通过 PWM 输入和电源实现 PWM 调光
针对 EMC 优化的压摆率
高精度 LED 驱动
采用外部 N 沟道 MOSFET 的精密电流调节(2.5% 容差)
具有非板载 Bin 电阻支持的 20:1 模拟调光配置
具有全占空比屏蔽的精密 PWM 发生器(2% 容差)
用于同步的开漏 PWM 输出
保护和诊断
用于外部 MOSFET 热保护的可调节输出电流降额
具有自动恢复功能的 LED 灯串开路或短路诊断
针对低电压运行支持诊断并具有可调节阈值
多达 15 个器件的故障总线,可配置为连带失效或仅失效的通道关闭
故障模式下具有较低的静态电流(每个器件小于 0.75mA)
工作结温范围:-40°C 至 150°C
TSSOP 28 封装 (PW)
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