Specification	UCC3809EVM

Board Type	Fully Populated
Contents	Board(s)
Current - Output	3.3 A
Frequency - Switching	380 kHz
Main Purpose	DC/DC, Step Down
Outputs and Type	1 Non-Isolated Output, Non-Isolated
Outputs and Type	1
Regulator Topology	Buck
Supplied Contents	Board(s)
Utilized IC / Part	UCC3809
Voltage - Input [Max]	75 V
Voltage - Input [Min]	32 V
Voltage - Output	3.3 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	Bulk	1	$ 118.80

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.