UCC38C44 Series

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

Catalog(4 parts)

Part	Package / Case	Package / Case▲▼	Package / Case▲▼	Topology	Mounting Type	Operating Temperature▲▼	Output Type	Frequency - Switching▲▼	Function	Output Phases▲▼	Supplier Device Package	Output Configuration	Duty Cycle (Max)▲▼	Number of Outputs▲▼	Voltage - Supply (Vcc/Vdd)▲▼	Voltage - Supply (Vcc/Vdd)▲▼	Control Features
Texas Instruments UCC38C44P Boost, Flyback, Forward Converter Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-PDIP	8-DIP	0.007619999814778566 m	0.007619999814778566 m	Boost, Flyback, Forward Converter	Through Hole	70 °C	Transistor Driver	1000000 Hz	Step-Up, Step-Up/Step-Down	1 ul	8-PDIP	Positive	0.47999998927116394 ul	1 ul	9 V	18 V	Frequency Control
Texas Instruments UCC38C44DG4 Boost, Flyback, Forward Converter Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-SOIC	8-SOIC	0.003899999894201755 m		Boost, Flyback, Forward Converter	Surface Mount	70 °C	Transistor Driver	1000000 Hz	Step-Up, Step-Up/Step-Down	1 ul	8-SOIC	Positive	0.47999998927116394 ul	1 ul	9 V	18 V	Frequency Control
Texas Instruments UCC38C44D Boost, Flyback, Forward Converter Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-SOIC	8-SOIC	0.003899999894201755 m		Boost, Flyback, Forward Converter	Surface Mount	70 °C	Transistor Driver	1000000 Hz	Step-Up, Step-Up/Step-Down	1 ul	8-SOIC	Positive	0.47999998927116394 ul	1 ul	9 V	18 V	Frequency Control
Texas Instruments UCC38C44DGK Boost, Flyback, Forward Converter Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-VSSOP	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	Boost, Flyback, Forward Converter	Surface Mount	70 °C	Transistor Driver	1000000 Hz	Step-Up, Step-Up/Step-Down	1 ul		Positive	0.47999998927116394 ul	1 ul	9 V	18 V	Frequency Control

Key Features

• Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibilityOperating frequency: 1MHz Maximum50µA Startup Current, 100µA MaximumLow operating current: 2.3mA (at fOSC = 52kHz)Fast, cycle-by-cycle overcurrent limiting: 35nsPeak driving current: ±1A. Rail-to-rail output:25ns rise time20ns fall time±1% accurate 2.5V error amplifier referenceTrimmed oscillator discharge currentUndervoltage lockout protectionsVSSOP-8 package minimizes board spaceEnhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibilityOperating frequency: 1MHz Maximum50µA Startup Current, 100µA MaximumLow operating current: 2.3mA (at fOSC = 52kHz)Fast, cycle-by-cycle overcurrent limiting: 35nsPeak driving current: ±1A. Rail-to-rail output:25ns rise time20ns fall time±1% accurate 2.5V error amplifier referenceTrimmed oscillator discharge currentUndervoltage lockout protectionsVSSOP-8 package minimizes board space

Description

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. The UCCx8C4x family is offered in 8-pin VSSOP (DGK) and 8-pin SOIC (D) packages. 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. The UCCx8C4x family is offered in 8-pin VSSOP (DGK) and 8-pin SOIC (D) packages.