UCC28630 Datasheet, PDF (1/68 Pages) Texas Instruments – High-Power Flyback Controller with Primary-Side Regulation and Peak-Power Mode

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UCC28630
SLUSBW3A – MARCH 2014 – REVISED MARCH 2014
UCC28630, High-Power Flyback Controller
with Primary-Side Regulation and Peak-Power Mode
1 Features
•1 High-Power, Primary-Side Regulation for Output
Voltage and Current, No Opto-Coupler Required
• Continuous Conduction Mode (CCM) and
Discontinuous Conduction Mode (DCM) Operation
• Built-In 700-V Start-Up Current Source
• Active X-Capacitor Discharge Function
• Constant-Current (CC) Mode Limiting
• High Gate Drive Current 1-A Source and 2-A Sink
• Low Power Modes for <30-mW System Standby
• Best-In-Class Light Load (10%) Efficiency >85%
for 65-W Nominal Power Design
• Peak-Power Mode for Transient Overload
• Shutdown Terminal Interface for External NTC
• Protections: Overvoltage, Overcurrent, Over-
Temperature, Overload Timer, AC Line UV,
Brownout and Terminal Protections
• Frequency Dither to Ease EMI Compliance
2 Applications
• AC-DC Adapters for Notebook, Game Consoles,
Printers
• Open Frame SMPS for Industrial, Printer, White
Goods, LCD Monitors
• Energy Efficient AC-DC Supplies for Nominal
Power 10-W to 65-W, (with up to 200% transient
peak power)
3 Description
The UCC28630 targets high-power, primary-side
regulated flyback converters. The powerful gate driver
and ability to operate in both CCM and DCM make
the device suitable for applications with a wide power
range. The peak power mode allows transient peak
power delivery up to 200% of nominal rating, with
only a 25% peak current increase, maximizing
transformer utilization.
The transformer bias winding is used to sense output
voltage for regulation, and for low-loss input voltage
sensing. Advanced sampling and processing
techniques allow CCM operation, and deliver
excellent output voltage regulation performance for
opto-coupler-less designs at power levels of 100 W
and above.
A high-voltage current source enables fast and
efficient start-up. Advanced light-load modes are
deployed (including switching frequency modulation
and device sleep modes) to reduce both controller
and system power consumption at no load and light
load. These modes enable potential system designs
to meet 30-mW no-load power for power designs up
to 30 W nominal, 60 W peak.
The device has been designed for ease-of-use and
incorporates many features to enable a wide range of
designs. Extensive protection features are included to
simplify system design.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
UCC28630D
SOIC (7)
4.9 mm x 3.9 mm
4 Simplified Schematic
VAC
EMC
Filter
VOUT
1 VSENSE
HV 8
2 SD
t^o
UCC28630
3 CS
VDD 6
4 GND
DRV 5
Typical Application Measured Regulation
21
20.5
20
19.5
19
18.5
18
0
“ 1% Typical
+5% Limit
115V/60 Hz
230V/50 Hz
±5% Limit
10 20 30 40 50 60 70
Output Power (W)
C001
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.