SLUSDW0B May 2020 – May 2020 UCC28065
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Description (Continued)
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Principles of Operation
- 8.3.2 Natural Interleaving
- 8.3.3 On-Time Control, Maximum Frequency Limiting, Restart Timer and Input Voltage Feed-Forward compensation
- 8.3.4 Zero-Current Detection and Valley Switching
- 8.3.5 Phase Management and Light-Load Operation
- 8.3.6 Burst Mode Operation
- 8.3.7 External Disable
- 8.3.8 Improved Error Amplifier
- 8.3.9 Soft Start
- 8.3.10 Brownout Protection
- 8.3.11 Line Dropout Detection
- 8.3.12 VREF
- 8.3.13 VCC
- 8.3.14
System Level Protections
- 8.3.14.1 Failsafe OVP - Output Over-voltage Protection
- 8.3.14.2 Overcurrent Protection
- 8.3.14.3 Open-Loop Protection
- 8.3.14.4 VCC Undervoltage Lock-Out (UVLO) Protection
- 8.3.14.5 Phase-Fail Protection
- 8.3.14.6 CS - Open, TSET - Open and Short Protection
- 8.3.14.7 Thermal Shutdown Protection
- 8.3.14.8 Fault Logic Diagram
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Inductor Selection
- 9.2.2.2 ZCD Resistor Selection RZA, RZB
- 9.2.2.3 HVSEN
- 9.2.2.4 Output Capacitor Selection
- 9.2.2.5 Selecting RS For Peak Current Limiting
- 9.2.2.6 Power Semiconductor Selection (Q1, Q2, D1, D2)
- 9.2.2.7 Brownout Protection
- 9.2.2.8 Converter Timing
- 9.2.2.9 Programming VOUT
- 9.2.2.10 Voltage Loop Compensation
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
7.6 Typical Characteristics
VVCC = 16 V, VAGND = VPGND = 0 V, VVINAC = 3 V, VVSENSE = 6 V, VHVSEN = 3 V, VPHB = 0 V, RTSET = 133 kΩ; all voltages are with respect to GND, all outputs unloaded, TJ = 25°C, and currents are positive into and negative out of the specified terminal, unless otherwise noted.
| CLOAD = 4.7 nF | ||
| CLOAD = 4.7 nF | |||
| Soft-start period completed |
| CLOAD = 4.7 nF | ||
| CLOAD = 4.7 nF | ||