UCC24650 Monitor Datasheet

UCC24650 Datasheet PDF, Equivalent


Part Number

UCC24650

Description

200-V Wake-Up Monitor

Manufacture

etcTI

Total Page 29 Pages
Datasheet
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UCC24650
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UCC24650
SLUSBL6 – FEBRUARY 2015
UCC24650 200-V Wake-Up Monitor for Fast Transient PSR
1 Features
1 Enables Excellent Load Transient Performance
and Zero Standby Power
• Enables Smallest Output Capacitor for Tight
ΔVOUT
• No External Components Required
• <50 µA Device Current Consumption (Typical)
• 5-V to 28-V Output Monitoring Capability
• 3% Voltage Droop Detection (Patent Pending)
• 200-V Wake-Up Switch
• Enables and Disables SR Controller, Relay
Control, or Other Secondary Circuits
• SOT-23 5-Pin Package
2 Applications
• <5-mW Zero-Power Standby Applications
• Adapters and Chargers for Consumer Electronics
– Smart Phones, Tablets, Set-Top Box
• TV and Monitor Power Supplies
• Home Appliance SMPS
– Refrigerator, Washing Machine, Air
Conditioners
• Industrial Power Supplies for Lighting and Home
Automation
Simplified Application Schematic
VAC
VAUX
NA
DA
RS1
RS2
VBULK
NP NS
CB1
CB2
VSEC
UCC24650
5 WAKE VDD 1
UCC28730
1 VDD HV 7
CVDD
M1
DRV 6
3 ENS GND 2
DS
2 VS
CS
3
RCBC
CBC
GND
4
5
RLC
RCS
VOUT
COUT
IOUT
RPL
3 Description
The UCC24650 is an easy-to-use secondary-side
voltage monitor that periodically measures its own
VDD voltage. A relative droop of 3% from the
previous reading triggers a wake-up alert signal to a
receiving primary-side regulation (PSR) controller. Its
low-power consumption helps achieve <5-mW Zero-
Power standby loss in many applications.
An internal 200-V MOSFET switch is applied across a
ground-referenced rectifier to provide a current-
limited pulse to the flyback transformer secondary
winding, which couples the signal to the primary-side
controller. This signal is repeated at 33 kHz until
controller-driven switching activity is detected.
Relative-droop detection allows scaling to any voltage
between 5 and 28 V. The wake-up alert function
allows very-low standby frequency to minimize
switching loss and reduction of output capacitance
needed to respond to a heavy load step. This monitor
is used with a controller capable of detecting the
wake-up signal, such as the UCC28730 PSR flyback
controller.
The UCC24650 also provides an enable and disable
signal which can be used to control a secondary-side
circuit during no-load conditions to reduce standby
power loss. Such a circuit may be a synchronous
rectifier controller or a relay driver, for example.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC24650
SOT-23 (5)
2.92 mm × 1.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Rapid Full-Load Step Response
5.1 V +/-5% Cout = 540 mF
2-A Load Step
Input
Voltage
115 VRMS
230 VRMS
No-load
Input Power
3.0 mW
3.5 mW
Switching Pulses
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.

UCC24650
UCC24650
SLUSBL6 – FEBRUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ............................................... 6
6.7 Switching Characteristics .......................................... 6
6.8 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 16
8 Application and Implementation ........................ 17
8.1 Application Information............................................ 17
8.2 Typical Application ................................................. 17
9 Power Supply Recommendations...................... 19
10 Layout................................................................... 20
10.1 Layout Guidelines ................................................. 20
10.2 Layout Example .................................................... 20
11 Device and Documentation Support ................. 21
11.1 Documentation Support ........................................ 21
11.2 Trademarks ........................................................... 21
11.3 Electrostatic Discharge Caution ............................ 21
11.4 Glossary ................................................................ 21
12 Mechanical, Packaging, and Orderable
Information ........................................................... 21
4 Revision History
DATE
February 2015
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: UCC24650
Copyright © 2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC24650 SLUSBL6 – FEBRUAR Y 2015 UCC24650 200-V Wake-Up Monitor f or Fast Transient PSR 1 Features •1 Enables Excellent Load Transient Perfor mance and Zero Standby Power • Enable s Smallest Output Capacitor for Tight VOUT • No External Components Requir ed • <50 µA Device Current Consumpti on (Typical) • 5-V to 28-V Output Mon itoring Capability • 3% Voltage Droop Detection (Patent Pending) • 200-V W ake-Up Switch • Enables and Disables SR Controller, Relay Control, or Other Secondary Circuits • SOT-23 5-Pin Pac kage 2 Applications • <5-mW Zero-Powe r Standby Applications • Adapters and Chargers for Consumer Electronics – Smart Phones, Tablets, Set-Top Box • TV and Monitor Power Supplies • Home Appliance SMPS – Refrigerator, Washin g Machine, Air Conditioners • Industr ial Power Supplies for Lighting and Hom e Automation Simplified Application Schematic VAC VAUX NA DA RS1 RS2 VBULK NP NS CB1 CB2 .
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