Texas Instruments UCC28600 Manual

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8-Pin Quasi-Resonant Flyback Green-Mode Controller
FEATURES
1
•
Green-Mode Controller With Advanced Energy
2
Saving Features
• Quasi-Resonant Mode Operation for Reduced
EMI and Low Switching Losses (Low Voltage
Switching)
• Low Standby Current for System No-Load
Power Consumption
• Low Startup Current: 25 μA Maximum
• Programmable Overvoltage Protection, Line
and Load
• Internal Overtemperature Protection
• Current Limit Protection
– Cycle-by-Cycle Power Limit
– Primary-Side Overcurrent Hiccup Restart
Mode
• 1-A Sink TrueDrive™, -0.75-A Source Gate
Drive Output
•
Programmable Soft-Start
• Green-Mode Status Pin (PFC Disable Function)
.
.
TYPICAL APPLICATION
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TrueDrive is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Check for Samples:
18 V
UCC28051
1 VO_SNS VCC 8
2 COMP DRV 7
3 MULTIN GND 6
Feedback
4 CS ZCD 5
SLUS646J – NOVEMBER 2005 – REVISED JULY 2011
UCC28600
APPLICATIONS
•
Bias Supplies for LCD-Monitors, LCD-TV,
PDP-TV, and Set Top Boxes
• AC/DC Adapters and Offline Battery Chargers
• Energy Efficient Power Supplies up to 200 W
DESCRIPTION
The UCC28600 is a PWM controller with advanced
energy features to meet stringent world-wide energy
efficiency requirements.
UCC28600 integrates
saving features with high level protection features to
provide cost effective solutions for energy efficient
power supplies. UCC28600 incorporates frequency
fold back and green mode operation to reduce the
operation frequency at light load and no load
operations.
UCC28600 is offered in the 8-pin SOIC (D) package.
Operating junction temperature range is -40°C to
105°C.
Primary
C
R
BULK
SU
C
B
R
UCC28600
OVP1
C
SS
1 SS STATUS 8 C
VDD
2 FB OVP 7
R
OVP2
3 CS VDD 6
4 GND OUT 5
M
1
C
R
BP
PL
Copyright © 2005–2011, Texas Instruments Incorporated
UCC28600
built-in advanced
Secondary
N N
P S
N
B
R
CS
TL431
energy