Off-Line Converter. UCC28881 Datasheet

UCC28881 Converter. Datasheet pdf. Equivalent

UCC28881 Datasheet
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Part UCC28881
Description 225-mA Low Quiescent Current Off-Line Converter
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Buy
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UCC28881
SLUSC36B – NOVEMBER 2015 – REVISED JANUARY 2016
UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Converter
1 Features
1 Integrated 14-Ω, 700-V Power MOSFET
• Integrated High-Voltage Current Source for
Internal Device Bias Power
• Integrated Current Sense
• Internal Soft Start
• Self-Biased Switcher (Start Up and Operation
Directly from Rectified Mains Voltage)
• Supports Buck, Buck-Boost and Flyback
Topologies
• <100-μA Device Quiescent Current
• Robust Current Protection During Load Short
Circuit
• Protection
– Current Limit
– Overload and Output Short Circuit
– Over Temperature
2 Applications
• AC-to-DC Power Supplies
(Non-Isolated Buck Converter with Output Current
up to 225 mA for CCM;
150 mA for DCM)
• E-Meter, Home Automation SMPS
• Bias Power for MCU, RF and IoT Enabled
Devices
• Appliances, White Goods and LED Drivers
3 Description
The UCC28881 integrates the controller and a 14-Ω,
700-V power MOSFET into one monolithic device.
The device also integrates a high-voltage current
source, enabling start up and operation directly from
the rectified mains voltage. UCC28881 is the same
family device of UCC28880, with higher current
handling capability.
The low quiescent current of the device enables
excellent efficiency. With the UCC28881 the most
common converter topologies, such as buck, buck-
boost and flyback can be built using a minimum
number of external components.
The UCC28881 incorporates a soft-start feature for
controlled start up of the power stage which
minimizes the stress on the power-stage
components.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC28881
SOIC (7)
5.00 mm × 6.20 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
UCC28881
1 GND DRAIN 8
2 GND
3 FB
NC 6
VIN 4 VDD HVIN 5
+
VOUT
-
40
35
30
25
20
15
10
5
0
-5
50
2.7-W Low-Side Buck Standby Power
UCC28881 Power Consumption
100 150 200 250
AC Input Voltage (VRMS)
300
D001
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.



Texas Instruments UCC28881
UCC28881
SLUSC36B – NOVEMBER 2015 – REVISED JANUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison ............................................... 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....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Switching Characteristics .......................................... 6
7.7 Typical Characteristics ............................................. 7
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 ........................ 16
9.1 Application Information............................................ 16
9.2 Typical Application .................................................. 16
10 Power Supply Recommendations ..................... 26
11 Layout................................................................... 26
11.1 Layout Guidelines ................................................ 26
11.2 Layout Example .................................................... 26
12 Device and Documentation Support ................. 27
12.1 Device Support .................................................... 27
12.2 Community Resources.......................................... 27
12.3 Trademarks ........................................................... 27
12.4 Electrostatic Discharge Caution ............................ 27
12.5 Glossary ................................................................ 27
13 Mechanical, Packaging, and Orderable
Information ........................................................... 27
4 Revision History
Changes from Revision A (December 2015) to Revision B
Page
• Changed the documents title from, "UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Switcher", to
"UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Converter". ........................................................................... 1
Changes from Original (November 2015) to Revision A
Page
• Changed marketing status from product preview to production data. ................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: UCC28881
Copyright © 2015–2016, Texas Instruments Incorporated



Texas Instruments UCC28881
www.ti.com
UCC28881
SLUSC36B – NOVEMBER 2015 – REVISED JANUARY 2016
5 Device Comparison
PRODUCT
UCC28880
UCC28881
Power Handling Capability with Different Topologies
MAXIMUM OUTPUT CURRENT
for 85 ~ 265 VAC OPEN FRAME DESIGN
MAXIMUM OUTPUT POWER
for 85 ~ 265 VAC OPEN FRAME DESIGN
NON-ISOLATED BUCK
FLYBACK
100 mA
3W
225 mA
4.5 W
6 Pin Configuration and Functions
GND
GND
FB
VDD
D package
8-Pin SOIC
Top View
18
2
36
45
DRAIN
NC
HVIN
NAME
DRAIN
FB
GND
GND
HVIN
NC
VDD
PIN
NO.
8
3
1
2
5
6
4
Pin Functions
I/O DESCRIPTION
P Drain pin
I Feedback terminal
G Ground
G Ground
P Supply pin
N/C Not internally connected
O Supply pin, supply is provided by internal LDO
Copyright © 2015–2016, Texas Instruments Incorporated
Product Folder Links: UCC28881
Submit Documentation Feedback
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