ZHCSKL3C
December 2019 – May 2024
LP8866-Q1
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Logic Interface Characteristics
5.7
Timing Requirements for I2C Interface
14
5.8
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Control Interface
6.3.2
Function Setting
6.3.3
Device Supply (VDD)
6.3.4
Enable (EN)
6.3.5
Charge Pump
6.3.6
Boost Controller
6.3.6.1
Boost Cycle-by-Cycle Current Limit
6.3.6.2
Controller Min On/Off Time
6.3.6.3
Boost Adaptive Voltage Control
6.3.6.3.1
FB Divider Using Two-Resistor Method
6.3.6.3.2
FB Divider Using Three-Resistor Method
6.3.6.3.3
FB Divider Using External Compensation
6.3.6.4
Boost Sync and Spread Spectrum
6.3.6.5
Boost Output Discharge
6.3.6.6
Light Load Mode
6.3.7
LED Current Sinks
6.3.7.1
LED Output Current Setting
6.3.7.2
LED Output String Configuration
6.3.7.3
LED Output PWM Clock Generation
6.3.8
Brightness Control
6.3.8.1
Brightness Control Signal Path
6.3.8.2
Dimming Mode
6.3.8.3
LED Dimming Frequency
6.3.8.4
Phase-Shift PWM Mode
6.3.8.5
Hybrid Mode
6.3.8.6
Direct PWM Mode
6.3.8.7
Sloper
6.3.8.8
PWM Detector Hysteresis
6.3.8.9
Dither
6.3.9
Protection and Fault Detections
6.3.9.1
Supply Faults
6.3.9.1.1
VIN Undervoltage Faults (VINUVLO)
6.3.9.1.2
VIN Overvoltage Faults (VINOVP)
6.3.9.1.3
VDD Undervoltage Faults (VDDUVLO)
6.3.9.1.4
VIN OCP Faults (VINOCP)
6.3.9.1.4.1
VIN OCP Current Limit vs. Boost Cycle-by-Cycle Current Limit
6.3.9.1.5
Charge Pump Faults (CPCAP, CP)
6.3.9.1.6
CRC Error Faults (CRCERR)
6.3.9.2
Boost Faults
6.3.9.2.1
Boost Overvoltage Faults (BSTOVPL, BSTOVPH)
6.3.9.2.2
Boost Overcurrent Faults (BSTOCP)
6.3.9.2.3
LEDSET Resistor Missing Faults (LEDSET)
6.3.9.2.4
MODE Resistor Missing Faults (MODESEL)
6.3.9.2.5
FSET Resistor Missing Faults (FSET)
6.3.9.2.6
ISET Resistor Out of Range Faults (ISET)
6.3.9.2.7
Thermal Shutdown Faults (TSD)
6.3.9.3
LED Faults
6.3.9.3.1
Open LED Faults (OPEN_LED)
6.3.9.3.2
Short LED Faults (SHORT_LED)
6.3.9.3.3
LED Short to GND Faults (GND_LED)
6.3.9.3.4
Invalid LED String Faults (INVSTRING)
6.3.9.3.5
I2C Timeout Faults
6.3.9.4
Overview of the Fault and Protection Schemes
6.4
Device Functional Modes
6.4.1
State Diagram
6.4.2
Shutdown
6.4.3
Device Initialization
6.4.4
Standby Mode
6.4.5
Power-line FET Soft Start
6.4.6
Boost Start-Up
6.4.7
Normal Mode
6.4.8
Fault Recovery
6.4.9
Latch Fault
6.4.10
Start-Up Sequence
6.5
Programming
6.5.1
I2C-Compatible Interface
6.5.2
Programming Examples
6.5.2.1
General Configuration Registers
6.5.2.2
Clearing Fault Interrupts
6.5.2.3
Disabling Fault Interrupts
6.5.2.4
Diagnostic Registers
7
Register Maps
7.1
FullMap Registers
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Full Feature Application for Display Backlight
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
Charge Pump Output Capacitor
8.2.1.2.5
Charge Pump Flying Capacitor
8.2.1.2.6
Output Diode
8.2.1.2.7
Switching FET
8.2.1.2.8
Boost Sense Resistor
8.2.1.2.9
Power-Line FET
8.2.1.2.10
Input Current Sense Resistor
8.2.1.2.11
Feedback Resistor Divider
8.2.1.2.12
Critical Components for Design
8.2.1.3
Application Curves
8.2.2
Application with Basic/Minimal Operation
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
Application Curves
8.2.3
SEPIC Mode Application
8.2.3.1
Design Requirements
8.2.3.2
Detailed Design Procedure
8.2.3.2.1
Inductor Selection
8.2.3.2.2
Coupling Capacitor Selection
8.2.3.2.3
Output Capacitor Selection
8.2.3.2.4
Input Capacitor Selection
8.2.3.2.5
Charge Pump Output Capacitor
8.2.3.2.6
Charge Pump Flying Capacitor
8.2.3.2.7
Switching FET
8.2.3.2.8
Output Diode
8.2.3.2.9
Switching Sense Resistor
8.2.3.2.10
Power-Line FET
8.2.3.2.11
Input Current Sense Resistor
8.2.3.2.12
Feedback Resistor Divider
8.2.3.2.13
Critical Components for Design
8.2.3.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
第三方米6体育平台手机版_好二三四免责声明
9.2
接收文档更新通知
9.3
支持资源
9.4
Trademarks
9.5
静电放电警告
9.6
术语表
10
Revision History
11
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RHB|32
MPQF130D
DCP|38
MPDS520B
散热焊盘机械数据 (封装 | 引脚)
RHB|32
QFND589
DCP|38
PPTD170A
8.2.1.2
Detailed Design Procedure
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