SLVS465C
December 2003 – February 2016
TPS61043
PRODUCTION DATA.
1
Features
2
Applications
3
Description
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
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Operation
8.3.2
Boost Converter
8.3.3
Peak Current Control (Boost Converter)
8.3.4
Softstart
8.3.5
Control (CTRL)
8.4
Device Functional Modes
8.4.1
Overvoltage Protection (OVP)
8.4.2
Undervoltage Lockout
8.4.3
Thermal Shutdown
9
Application and Implementation
9.1
Application Information
9.1.1
Efficiency
9.1.2
Setting the LED Current
9.1.3
Analog Control Signal for Brightness Control
9.1.4
PWM Control With Separate Enable
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Inductor Selection, Maximum Load Current, and Switching Frequency
9.2.2.2
Output Capacitor Selection and Line Regulation
9.2.2.3
Input Capacitor Selection
9.2.2.4
Diode Selection
9.2.3
Application Curves
9.3
System Examples
9.3.1
TPS61043 With 1-mm Total System Height
9.3.2
TPS61043 With Low LED Ripple Current and Higher Accuracy Using a 4.7-µF Output Capacitor
9.3.3
TPS61043 Powering 3 LEDs
9.3.4
Adjustable Brightness Control Using an Analog Voltage
9.3.5
Alternative Adjustable Brightness Control Using PWM Signal
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
11.3
Thermal Considerations
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
メカニカル・データ(パッケージ|ピン)
DRB|8
サーマルパッド・メカニカル・データ
DRB|8
QFND058N
7 Parameter Measurement Information
Figure 8. Schematic