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UCC28910
UCC28911
SLUS769C –JULY 2013–REVISED MARCH 2015
UCC28910, UCC28911 High-Voltage Flyback Switcher
with Primary-Side Regulation and Output Current Control
1 Features
3 Description
The UCC28910 and UCC28911 are high-voltage
1
•
Constant-Voltage (CV) and Constant-Current (CC)
Output Regulation Without Optical-Coupler
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.
•
•
±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
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.
•
•
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
Device Information
•
•
•
•
Wall Adapters, Chargers for Mobile Phones
Smart plug, IoT, MCU and WiFi Power
Aux power for TV, Server, White Goods
LED Lighting
PART NUMBER
UCC28910
PACKAGE
SOIC-7 (7)
SOIC-7 (7)
BODY SIZE (NOM)
5.00 mm x 6.20 mm
5.00 mm x 6.20 mm
UCC28911
4 Simplified Schematic
Typical Target Output V-I Characteristic
5
4
3
2
1
UCC2891x
DRAIN
8
±5%
1
2
3
4
GND
GND
GND
IPK
VDD
VS
6
5
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.