UCC28911 Switcher Datasheet

UCC28911 Datasheet PDF, Equivalent


Part Number

UCC28911

Description

High-Voltage Flyback Switcher

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCC28911
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UCC28910
UCC28911
SLUS769D – JULY 2013 – REVISED DECEMBER 2016
UCC28910, UCC28911 High-Voltage Flyback Switcher
with Primary-Side Regulation and Output Current Control
1 Features
1 Constant-Voltage (CV) and Constant-Current (CC)
Output Regulation Without Optical-Coupler
• ±5% Output Voltage Regulation Accuracy
• ±5% Output Current Regulation With AC Line and
Primary Inductance Tolerance Compensation
• 700-V Start-Up and Smart Power Management
Enables <30-mW Standby Power
• 115-kHz Maximum Switching Frequency Design
for High-Power Density
• Valley Switching and Frequency Dithering to Ease
EMI Compliance
• Thermal Shut Down
• Low Line and Output Over-Voltage Protection
2 Applications
• Home and Building Automation
• Power Metering Bias
• Bias Power for Smoke Alarm, Fire Alarm and
Thermostat
• Wall Adapters, Chargers for Mobile Phones
• Smart plug, IoT, MCU and WiFi Power
• Aux power for TV, Server, White Goods
• LED Lighting
3 Description
The UCC28910 and UCC28911 are high-voltage
flyback switchers that provide output voltage and
current regulation without the use of an optical
coupler. Both devices incorporate a 700-V power FET
and a controller that process operating information
from the flyback auxiliary winding and power FET to
provide a precise output voltage and current control.
The integrated high-voltage current source for startup
that is switched off during device operation, and the
controller current consumption is dynamically
adjusted with load. Both enable the very low stand-by
power consumption.
Control algorithms in the UCC28910 and UCC28911,
combining switching frequency and peak primary
current modulation, allow operating efficiencies to
meet or exceed applicable standards. Discontinuous
conduction mode (DCM) with valley switching is used
to reduce switching losses. Built-in protection features
help to keep secondary and primary component
stress levels in check across the operating range.
The frequency jitter helps to reduce EMI filter cost.
PART NUMBER
UCC28910
UCC28911
Device Information
PACKAGE
BODY SIZE (NOM)
SOIC-7 (7)
5.00 mm x 6.20 mm
SOIC-7 (7)
5.00 mm x 6.20 mm
4 Simplified Schematic
UCC2891x
DRAIN 8
1 GND
2 GND
3 GND VDD 6
4 IPK
VS 5
Typical Target Output V-I Characteristic
5
4
±5%
3
2
1 USB Specs. 1.1
Typical Application
0.25 0.5 0.75 1 1.25 1.5
Output Current (A)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

UCC28911
UCC28910
UCC28911
SLUS769D – JULY 2013 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Device Comparison Table..................................... 3
7 Pin Configuration and Functions ......................... 3
7.1 Detailed Pin Description............................................ 4
8 Specifications......................................................... 7
8.1 Absolute Maximum Ratings ...................................... 7
8.2 Storage Conditions.................................................... 7
8.3 ESD Ratings ............................................................ 7
8.4 Recommended Operating Conditions....................... 7
8.5 Thermal Information .................................................. 8
8.6 Electrical Characteristics........................................... 8
8.7 Switching Characteristics ........................................ 10
8.8 Typical Characteristics ............................................ 11
9 Detailed Description ............................................ 14
9.1 Overview ................................................................. 14
9.2 Functional Block Diagram ....................................... 15
9.3 Feature Description................................................. 16
9.4 Device Functional Modes........................................ 27
10 Applications and Implementation...................... 28
10.1 Application Information.......................................... 28
10.2 Typical Application ............................................... 28
11 Power Supply Recommendations ..................... 44
12 Layout................................................................... 44
12.1 Layout Guidelines ................................................. 44
12.2 Layout Example .................................................... 44
13 Device and Documentation Support ................. 45
13.1 Documentation Support ........................................ 45
13.2 Trademarks ........................................................... 47
13.3 Electrostatic Discharge Caution ............................ 47
13.4 Glossary ................................................................ 47
13.5 Related Links ........................................................ 47
14 Mechanical, Packaging, and Orderable
Information ........................................................... 47
5 Revision History
Changes from Revision C (March 2015) to Revision D
Page
• Deleted minimum Wait supply current specification............................................................................................................... 8
• Deleted minimum Quiescent wait supply current specification .............................................................................................. 8
• Added EMI Dithering section ................................................................................................................................................ 26
• Corrected typographical error in Equation 7......................................................................................................................... 33
Changes from Revision August 2014 (B) to Revision C
Page
• Added UCC28911 device ....................................................................................................................................................... 1
• Changed Simplified Schematic diagram................................................................................................................................. 1
• Added UCC28911 specifications throughout. ........................................................................................................................ 7
• Changed Typical Characteristics.......................................................................................................................................... 11
• Changed Figure 28............................................................................................................................................................... 23
• Changed Figure 29............................................................................................................................................................... 23
• Changed Applications and Implementation section to include the UCC28911 device......................................................... 28
Changes from Revision A (July 2013) to Revision B
Page
• Changed Simplified Schematic diagram................................................................................................................................. 1
Changes from Original (July 2013) to Revision A
Page
• Changed document status from Product Preview to Production Data .................................................................................. 1
2 Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
Product Folder Links: UCC28910 UCC28911


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC28910 UCC28911 SLUS769D JULY 2013 – REVISED DECEMBER 2016 UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control 1 Features •1 Constant-Voltage (CV) and Constant -Current (CC) Output Regulation Without Optical-Coupler • ±5% Output Voltag e Regulation Accuracy • ±5% Output C urrent Regulation With AC Line and Prim ary Inductance Tolerance Compensation 700-V Start-Up and Smart Power Manag ement Enables <30-mW Standby Power • 115-kHz Maximum Switching Frequency Des ign for High-Power Density • Valley S witching and Frequency Dithering to Eas e EMI Compliance • Thermal Shut Down • Low Line and Output Over-Voltage Pr otection 2 Applications • Home and Bu ilding Automation • Power Metering Bi as • Bias Power for Smoke Alarm, Fire Alarm and Thermostat • Wall Adapters , Chargers for Mobile Phones • Smart plug, IoT, MCU and WiFi Power • Aux power for TV, Server.
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