UCC3809D-1

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Texas Instruments

ECONOMY PRIMARY SIDE CONTROLLER WITH 10V/8V UVLO, 0C TO 70C

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DocumentsDatasheet U-165 Design Rvw: Isolated 50 W Flyback Converter Using UCC3809 and UC3965 +8

UCC3809D-1

Active

Texas Instruments

ECONOMY PRIMARY SIDE CONTROLLER WITH 10V/8V UVLO, 0C TO 70C

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DocumentsDatasheet U-165 Design Rvw: Isolated 50 W Flyback Converter Using UCC3809 and UC3965 +8

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UCC3809D-1

Control Features	Soft Start, Frequency Control
Duty Cycle	70 %
Frequency - Switching	1 MHz
Internal Switch(s)	False
Mounting Type	Surface Mount
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-55 °C
Output Isolation	Isolated
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SOIC
Topology	Flyback, Boost, Forward, Buck
Voltage - Start Up	15 V
Voltage - Supply (Vcc/Vdd) [Max]	19 V
Voltage - Supply (Vcc/Vdd) [Min]	8 V

UCC3809-2 Series

Economy primary side controller with 15V/8V UVLO, 0C to 70C

Part	Voltage - Start Up	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching	Output Isolation	Control Features	Package / Case	Package / Case [custom]	Package / Case	Topology	Duty Cycle	Supplier Device Package	Package / Case [y]	Package / Case [x]	Main Purpose	Voltage - Input [Min]	Voltage - Input [Max]	Outputs and Type	Current - Output	Supplied Contents	Regulator Topology	Contents	Board Type	Outputs and Type	Voltage - Output	Utilized IC / Part	Package / Case [custom]
Texas Instruments UCC3809PTR-2	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-MSOP 8-TSSOP	0.118 in	3 mm	Boost Buck Flyback Forward	70 %
Texas Instruments UCC3809P-1	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-MSOP 8-TSSOP	0.118 in	3 mm	Boost Buck Flyback Forward	70 %
Texas Instruments UCC3809P-2	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-MSOP 8-TSSOP	0.118 in	3 mm	Boost Buck Flyback Forward	70 %
Texas Instruments UCC3809DTR-1	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-SOIC			Boost Buck Flyback Forward	70 %	8-SOIC	3.9 mm	0.154 in
Texas Instruments UCC3809EVM							380 kHz											DC/DC Step Down	32 V	75 V	1 Non-Isolated Output Non-Isolated	3.3 A	Board(s)	Buck	Board(s)	Fully Populated	1	3.3 V	UCC3809
Texas Instruments UCC3809PTR-2G4	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-MSOP 8-TSSOP	0.118 in	3 mm	Boost Buck Flyback Forward	70 %
Texas Instruments UCC3809PWTR-1	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-TSSOP	0.173 "		Boost Buck Flyback Forward	70 %	8-TSSOP															4.4 mm
Texas Instruments UCC3809D-1	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-SOIC			Boost Buck Flyback Forward	70 %	8-SOIC	3.9 mm	0.154 in
Texas Instruments UCC3809PW-1	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-TSSOP	0.173 "		Boost Buck Flyback Forward	70 %	8-TSSOP															4.4 mm
Texas Instruments UCC3809PW-2	15 V	-55 °C	150 °C	Surface Mount	19 V	8 V	1 MHz	Isolated	Frequency Control Soft Start	8-TSSOP	0.173 "		Boost Buck Flyback Forward	70 %	8-TSSOP															4.4 mm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 2.02
		10	$ 1.81
		75	$ 1.71
		150	$ 1.48
		300	$ 1.41
		525	$ 1.34
Texas Instruments	TUBE	1	$ 2.49
		100	$ 2.18
		250	$ 1.53
		1000	$ 1.23

Description

General part information

UCC3809-2 Series

The UCC3809 family of BCDMOS economy low power integrated circuits contains all the control and drive circuitry required for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count. Internally implemented circuits include undervoltage lockout featuring startup current less than 100µA, a user accessible voltage reference, logic to ensure latched operation, a PWM comparator, and a totem pole output stage to sink or source peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.

Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3809 family also features full cycle soft start.

The family has UVLO thresholds and hysteresis levels for off-line and DC-to-DC systems as shown in the table to the left.

Documents

Technical documentation and resources

Datasheet

UCC3809D-1

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UCC3809D-1

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Technical Specifications

UCC3809-2 Series

Pricing

Description

UCC3809-2 Series

Documents

Datasheet

U-165 Design Rvw: Isolated 50 W Flyback Converter Using UCC3809 and UC3965

Programming the UCC3809 for 90% Maximum Duty Cycle Clamp

U-168 Implementing a Practical Off-line Lithium-Ion Charger Using the UCC3809

DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode

Power Management Guide 2018 (Rev. R)

U-165 Reference Design: Isolated 50 Watt Flyback Converter Using

Economy Primary Side Controller datasheet (Rev. B)

DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers

10-Watt Flyback Converter Utilizing the UCC3809 (Rev. B)

UCC3809-2 Series