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UCC28700-Q1 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
SLUSC61A
January 2015 – December 2020
UCC28700-Q1
PRODUCTION DATA
CONTENTS
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UCC28700-Q1 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
5.1
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings (1)
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Detailed Pin Description
7.3.1.1
VDD (Device Bias Voltage Supply)
7.3.1.2
GND (Ground)
7.3.1.3
VS (Voltage-Sense)
7.3.1.4
DRV (Gate Drive)
7.3.1.5
CS (Current Sense)
7.3.1.6
CBC (Cable Compensation)
7.3.2
Fault Protection
7.4
Device Functional Modes
7.4.1
Primary-Side Voltage Regulation
7.4.2
Primary-Side Current Regulation
7.4.3
Valley-Switching
7.4.4
Start-Up Operation
8
Applications and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Transformer Parameter Verification
8.2.2.2
Output Capacitance
8.2.2.3
VDD Capacitance, CDD
8.2.2.4
VDD Start-Up Resistance, RSTR
8.2.2.5
VS Resistor Divider, Line Compensation, and Cable Compensation
8.2.2.6
Input Bulk Capacitance and Minimum Bulk Voltage
8.2.2.7
Transformer Turns Ratio, Inductance, Primary-Peak Current
8.2.2.8
Standby Power Estimate
8.2.3
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
Device Nomenclature
11.1.1.1
Capacitance Terms in Farads
11.1.1.2
Duty Cycle Terms
11.1.1.3
Frequency Terms in Hertz
11.1.1.4
Current Terms in Amperes
11.1.1.5
Current and Voltage Scaling Terms
11.1.1.6
Transformer Terms
11.1.1.7
Power Terms in Watts
11.1.1.8
Resistance Terms in Ω
11.1.1.9
Timing Terms in Seconds
11.1.1.10
Voltage Terms in Volts
11.1.1.11
AC Voltage Terms in VRMS
11.1.1.12
Efficiency Terms
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Trademarks
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DBV|6
MPDS026Q
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusc61a_oa
slusc61a_pm
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