UCC3581D

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Texas Instruments

15V, 1A MICROPOWER VOLTAGE MODE PWM CONTROLLER, 0C TO 70C

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Search across all available documentation for this part.

DocumentsMicroPower Voltage Mode PWM datasheet (Rev. B)

UCC3581D

Active

Texas Instruments

15V, 1A MICROPOWER VOLTAGE MODE PWM CONTROLLER, 0C TO 70C

Deep-Dive with AI

DocumentsMicroPower Voltage Mode PWM datasheet (Rev. B)

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UCC3581D

Clock Sync	True
Control Features	Enable, Soft Start, Frequency Control, Current Limit
Duty Cycle (Max)	84 %
Frequency - Switching [Max]	100 kHz
Function	Step-Up, Step-Up/Step-Down, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	14-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Synchronous Rectifier	False
Topology	Boost, Forward Converter, Flyback, Buck
Voltage - Supply (Vcc/Vdd) [Max]	15 V
Voltage - Supply (Vcc/Vdd) [Min]	6.8 V

UCC3581 Series

15V, 1A Micropower voltage mode PWM controller, 0C to 70C

Part	Clock Sync	Frequency - Switching [Max]	Control Features	Output Phases	Function	Synchronous Rectifier	Output Type	Package / Case [x]	Package / Case [y]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Output Configuration	Duty Cycle (Max)	Topology	Number of Outputs	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]
Texas Instruments UCC3581D		100 kHz	Current Limit Enable Frequency Control Soft Start	1	Step-Down Step-Up Step-Up/Step-Down		Transistor Driver	0.154 in	3.9 mm	14-SOIC	70 °C	0 °C	Surface Mount	Isolation Capable Positive	84 %	Boost Buck Flyback Forward Converter	1	15 V	6.8 V
Texas Instruments UCC3581N		100 kHz	Current Limit Enable Frequency Control Soft Start	1	Step-Down Step-Up Step-Up/Step-Down		Transistor Driver	0.3 "	7.62 mm	14-DIP	70 °C	0 °C	Through Hole	Isolation Capable Positive	84 %	Boost Buck Flyback Forward Converter	1	15 V	6.8 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	350	$ 3.11
Texas Instruments	TUBE	1	$ 3.86
		100	$ 3.39
		250	$ 2.37
		1000	$ 1.91

Description

General part information

UCC3581 Series

The UCC3581 voltage mode pulse width modulator is designed to control low power isolated DC - DC converters in applications such as Subscriber Line Power (ISDN I.430). Primarily used for single switch forward and flyback converters, the UCC3581 features BiCMOS circuitry for low startup and operating current, while maintaining the ability to drive power MOSFETs at frequencies up to 100kHz. The UCC3581 oscillator allows the flexibility to program both the frequency and the maximum duty cycle with two resistors and a capacitor. A TTL level input is also provided to allow synchronization to an external frequency source.

The UCC3581 includes programmable soft start circuitry, overcurrent detection, a 7.5V linear preregulator to control chip VDD during startup, and an on-board 4.0V logic supply.

The UCC3581 provides functions to maximize light load efficiency that are not normally found in PWM controllers.

Documents

Technical documentation and resources

MicroPower Voltage Mode PWM datasheet (Rev. B)

Data sheet