Specification	UCC28631DR

Duty Cycle	70 %
Fault Protection	Over Temperature, Over Load, Current Limiting, Over Voltage
Frequency - Switching [Max]	120 kHz
Frequency - Switching [Min]	200 Hz
Internal Switch(s)	False
Mounting Type	Surface Mount
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Isolation	Isolated
Package / Case	8-SOIC
Package / Case	0.154 in
Package / Case [custom]	7
Package / Case [custom]	3.9 mm
Power (Watts)	30 W
Supplier Device Package	7-SOIC
Topology	Flyback
Voltage - Start Up	14.75 V
Voltage - Supply (Vcc/Vdd) [Max]	20 V
Voltage - Supply (Vcc/Vdd) [Min]	8 V

UCC28631 Series

High power Flyback controller with PSR, peak power mode, and Frequency Dither

Part	Operating Temperature [Min]	Operating Temperature [Max]	Duty Cycle	Topology	Mounting Type	Package / Case [custom]	Package / Case	Package / Case [custom]	Package / Case	Fault Protection	Internal Switch(s)	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Supplier Device Package	Power (Watts)	Voltage - Start Up	Output Isolation	Frequency - Switching [Max]	Frequency - Switching [Min]
Texas Instruments UCC28631DR	-40 °C	125 ¯C	70 %	Flyback	Surface Mount	7	8-SOIC	3.9 mm	0.154 in	Current Limiting Over Load Over Temperature Over Voltage		20 V	8 V	7-SOIC	30 W	14.75 V	Isolated	120 kHz	200 Hz

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	2500	$ 0.90
		5000	$ 0.87
Texas Instruments	LARGE T&R	1	$ 1.48
		100	$ 1.22
		250	$ 0.88
		1000	$ 0.66

Description

General part information

UCC28631 Series

The UCC2863x targets high-power, primary-side regulated flyback converters. The 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 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 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.

Documents

Technical documentation and resources

UCC2863x, High-Power Flyback Controller with Primary-Side Regulation and Peak-Power Mode datasheet (Rev. D)

Data sheet