Specification	UCC2809DTR-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	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Supplier Device Package	8-SOIC
Topology	Forward, Flyback, Boost
Voltage - Start Up	10 V
Voltage - Supply (Vcc/Vdd) [Max]	19 V
Voltage - Supply (Vcc/Vdd) [Min]	8 V

UCC2809 Series

Economy primary side controller with 150V/8V UVLO, -40C to 85C

Part	Frequency - Switching	Voltage - Start Up	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Isolation	Mounting Type	Duty Cycle	Topology	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Package / Case	Package / Case	Package / Case	Package / Case
Texas Instruments UCC2809PTR-1	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-VSSOP	8-MSOP 8-TSSOP	0.118 in 3 mm Width
Texas Instruments UCC2809PTR-1G4	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-VSSOP	8-MSOP 8-TSSOP	0.118 in 3 mm Width
Texas Instruments UCC2809PWTR-1G4	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-TSSOP	8-TSSOP		0.173 in	4.4 mm
Texas Instruments UCC2809DTR-1	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-SOIC	8-SOIC		0.154 in	3.9 mm
Texas Instruments UCC2809DTR-2	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-SOIC	8-SOIC		0.154 in	3.9 mm
Texas Instruments UCC2809PW-2	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-TSSOP	8-TSSOP		0.173 in	4.4 mm
Texas Instruments UCC2809P-1	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-VSSOP	8-MSOP 8-TSSOP	0.118 in 3 mm Width
Texas Instruments UCC2809P-2	1 MHz	15 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-VSSOP	8-MSOP 8-TSSOP	0.118 in 3 mm Width
Texas Instruments UCC2809PTR-2	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-VSSOP	8-MSOP 8-TSSOP	0.118 in 3 mm Width
Texas Instruments UCC2809DTR-1G4	1 MHz	10 V	8 V	19 V	Isolated	Surface Mount	70 %	Boost Flyback Forward	Frequency Control Soft Start	150 °C	-55 °C	8-SOIC	8-SOIC		0.154 in	3.9 mm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.11
		10	$ 2.79
		25	$ 2.64
		100	$ 2.29
		250	$ 2.17
		500	$ 1.95
		1000	$ 1.64
	Digi-Reel®	1	$ 3.11
		10	$ 2.79
		25	$ 2.64
		100	$ 2.29
		250	$ 2.17
		500	$ 1.95
		1000	$ 1.64
	N/A	6303	$ 3.76
	Tape & Reel (TR)	2500	$ 1.56
		5000	$ 1.50
Texas Instruments	LARGE T&R	1	$ 2.70
		100	$ 2.36
		250	$ 1.66
		1000	$ 1.33

Description

General part information

UCC2809 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

Economy Primary Side Controller datasheet (Rev. B)

Data sheet