UCC38C44DGK

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Texas Instruments

COMMERCIAL, 20-V, LOW-POWER CURRENT-MODE PWM CONTROLLER, 14.5-V/9-V UVLO, 50% DUTY CYCLE

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DocumentsSeminar 900 Topic 6 - High Power Factor Prereg Using SEPIC DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 +13

UCC38C44DGK

Active

Texas Instruments

COMMERCIAL, 20-V, LOW-POWER CURRENT-MODE PWM CONTROLLER, 14.5-V/9-V UVLO, 50% DUTY CYCLE

Deep-Dive with AI

DocumentsSeminar 900 Topic 6 - High Power Factor Prereg Using SEPIC DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 +13

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UCC38C44DGK

Clock Sync	False
Control Features	Frequency Control
Duty Cycle (Max) [Max]	48 %
Frequency - Switching [Max]	1 MHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	8-MSOP, 8-TSSOP
Package / Case	3 mm
Package / Case [custom]	0.118 in
Synchronous Rectifier	False
Topology	Flyback, Boost, Forward Converter
Voltage - Supply (Vcc/Vdd) [Max]	18 V
Voltage - Supply (Vcc/Vdd) [Min]	9 V

UCC38C44 Series

Commercial, 20-V, low-power current-mode PWM controller, 14.5-V/9-V UVLO, 50% duty cycle

Part	Control Features	Package / Case	Package / Case	Package / Case	Number of Outputs	Frequency - Switching [Max]	Mounting Type	Output Type	Function	Output Phases	Duty Cycle (Max) [Max]	Topology	Operating Temperature [Max]	Supplier Device Package	Output Configuration	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Package / Case [y]	Package / Case [x]	Package / Case [custom]
Texas Instruments UCC38C44P	Frequency Control	0.3 in	8-DIP	7.62 mm	1	1 MHz	Through Hole	Transistor Driver	Step-Up Step-Up/Step-Down	1	48 %	Boost Flyback Forward Converter	70 °C	8-PDIP	Positive	18 V	9 V
Texas Instruments UCC38C44D	Frequency Control		8-SOIC		1	1 MHz	Surface Mount	Transistor Driver	Step-Up Step-Up/Step-Down	1	48 %	Boost Flyback Forward Converter	70 °C	8-SOIC	Positive	18 V	9 V	3.9 mm	0.154 in
Texas Instruments UCC38C44DGK	Frequency Control	3 mm	8-MSOP 8-TSSOP		1	1 MHz	Surface Mount	Transistor Driver	Step-Up Step-Up/Step-Down	1	48 %	Boost Flyback Forward Converter	70 °C		Positive	18 V	9 V			0.118 in
Texas Instruments UCC38C44DGKR	Frequency Control	3 mm	8-MSOP 8-TSSOP		1	1 MHz	Surface Mount	Transistor Driver	Step-Up Step-Up/Step-Down	1	48 %	Boost Flyback Forward Converter	70 °C		Positive	18 V	9 V			0.118 in
Texas Instruments UCC38C44DR	Frequency Control		8-SOIC		1	1 MHz	Surface Mount	Transistor Driver	Step-Up Step-Up/Step-Down	1	48 %	Boost Flyback Forward Converter	70 °C	8-SOIC	Positive	18 V	9 V	3.9 mm	0.154 in

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	800	$ 1.14
Texas Instruments	TUBE	1	$ 1.78
		100	$ 1.47
		250	$ 1.06
		1000	$ 0.80

Description

General part information

UCC38C44 Series

The UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency.

In addition, lower startup voltage versions of 7V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 125°C, and the UCC38C4x series is specified for operation from 0°C to 85°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCCx8C4x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35ns for superior overload protection at the power switch, and a ±1A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.