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UCC28712 Datasheet Preview

UCC28712 Datasheet

Constant-Current Controller

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UCC28710, UCC28711, UCC28712, UCC28713

SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017

UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

1 Features

•1 < 10-mW No-Load Power

• Primary-Side Regulation (PSR) Eliminates Opto-

Coupler

• ±5% Voltage and Current Regulation Across Line

and Load

• 700-V Start-Up Switch

• 100-kHz Maximum Switching Frequency Enables

High-Power Density Charger Designs

• Resonant Valley-Switching Operation for Highest

Overall Efficiency

• Frequency Jitter to Ease EMI Compliance

• Wide VDD Range Allows Small Bias Capacitor

• Clamped Gate-Drive Output for MOSFET

• Overvoltage, Low-Line, and Overcurrent

Protection Functions

• Programmable Cable Compensation (UCC28710)

• NTC Resistor Interface (UCC28711, UCC28712

and UCC28713) with Fixed Cable Compensation

Options

• SOIC-7 Package

• Create a Custom Design Using the UCC28710

With the WEBENCH® Power Designer

2 Applications

• USB-Compliant Adapters and Chargers for

Consumer Electronics

– Smart Phones

– Tablet Computers

– Cameras

• Standby Supply for TV and Desktop

• White Goods

An internal 700-V start-up switch, dynamically-

controlled operating states and a tailored modulation

profile support ultra-low standby power without

sacrificing start-up time or output transient response.

Control algorithms in the UCC28710 family allow

operating efficiencies to meet or exceed applicable

standards. The output drive interfaces to a MOSFET

power switch. Discontinuous conduction mode (DCM)

with valley switching reduces switching losses.

Modulation of switching frequency and primary

current peak amplitude (FM and AM) keeps the

conversion efficiency high across the entire load and

line ranges.

The controllers have a maximum switching frequency

of 100 kHz and always maintain control of the peak-

primary current in the transformer. Protection features

help keep primary and secondary component

stresses in check. The UCC28710 allow the cable

compensation to be programmed. The UCC28711,

UCC28712 and UCC28713 devices allow remote

temperature sensing using a negative temperature

coefficient (NTC) resistor while providing fixed cable-

compensation levels.

Device Information(1)

PART NUMBER PACKAGE

BODY SIZE (NOM)

UCC28710

UCC28711

UCC28712

SOIC (7)

4.91 mm × 3.90 mm

UCC28713

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Application

VOUT

3 Description

The UCC2871x family of flyback power supply

controllers provides isolated-output Constant-Voltage

(CV) and Constant-Current (CC) output regulation

without the use of an optical coupler. The devices

process information from the primary power switch

and an auxiliary flyback winding for precise control of

output voltage and current.

VAC

VAUX

UCC28710

VDD HV

VS DRV

CBC CS

GND

UDG-12200

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.

etcTI

UCC28712 Datasheet Preview

UCC28712 Datasheet

Constant-Current Controller

No Preview Available !

UCC28710, UCC28711, UCC28712, UCC28713

SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017

www.ti.com

Table of Contents

1 Features .................................................................. 1

2 Applications ........................................................... 1

3 Description ............................................................. 1

4 Revision History..................................................... 2

5 Device Comparison Table..................................... 3

6 Pin Configuration and Functions ......................... 3

7 Specifications......................................................... 4

7.1 Absolute Maximum Ratings ...................................... 4

7.2 ESD Ratings.............................................................. 4

7.3 Recommended Operating Conditions....................... 4

7.4 Thermal Information .................................................. 4

7.5 Electrical Characteristics........................................... 5

7.6 Typical Characteristics .............................................. 6

8 Detailed Description .............................................. 9

8.1 Overview ................................................................... 9

8.2 Functional Block Diagram ......................................... 9

8.3 Feature Description................................................. 10

8.4 Device Functional Modes........................................ 12

9 Application and Implementation ........................ 17

9.1 Application Information............................................ 17

9.2 Typical Application .................................................. 17

10 Power Supply Recommendations ..................... 23

11 Layout................................................................... 23

11.1 Layout Guidelines ................................................. 23

11.2 Layout Example .................................................... 25

12 Device and Documentation Support ................. 26

12.1 Device Support...................................................... 26

12.2 Documentation Support ........................................ 28

12.3 Receiving Notification of Documentation Updates 28

12.4 Community Resources.......................................... 28

12.5 Trademarks ........................................................... 28

12.6 Electrostatic Discharge Caution ............................ 29

12.7 Glossary ................................................................ 29

13 Mechanical, Packaging, and Orderable

Information ........................................................... 29

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision B (July 2015) to Revision C

Page

• Deleted all references to the UCC28714, UCC28715, and UCC28716 devices.................................................................... 1

• Deleted quasi from quasi-resonant......................................................................................................................................... 1

• Added the Development Support, Receiving Notification of Documentation Updates, and Community Resources

sections................................................................................................................................................................................. 26

Changes from Revision A (December 2014) to Revision B

Page

• Updated Layout Guidelines section...................................................................................................................................... 23

Changes from Original (November 2012) to Revision A

Page

• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional

Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device

and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1

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