UCC38C42

現行

商用 20-V 低功耗電流模式 PWM 控制器、14.5-V/9-V UVLO、100% 工作週期

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產品規格表

document-pdfAcrobat UCCx8C4x BiCMOS Low-Power Current-Mode PWM Controller datasheet (Rev. I) (英文) PDF | HTML

UCC38C42

現行

立即訂購

產品詳細資料

Topology

Boost, Buck, Flyback, Forward, SEPIC

Control mode

Current

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology, Programmable max duty cycle

Duty cycle (max) (%)

100

Topology

Boost, Buck, Flyback, Forward, SEPIC

Control mode

Current

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology, Programmable max duty cycle

Duty cycle (max) (%)

100

VSSOP (DGK)

8

14.7 mm² (3 mm × 4.9 mm)

SOIC (D)

8

29.4 mm² (4.9 mm × 6 mm)

Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
Operating frequency: 1MHz Maximum
50µA Startup Current, 100µA Maximum
Low operating current: 2.3mA (at fOSC = 52kHz)
Fast, cycle-by-cycle overcurrent limiting: 35ns
Peak driving current: ±1A. Rail-to-rail output:
- 25ns rise time
- 20ns fall time
±1% accurate 2.5V error amplifier reference
Trimmed oscillator discharge current
Undervoltage lockout protections
VSSOP-8 package minimizes board space

Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
Operating frequency: 1MHz Maximum
50µA Startup Current, 100µA Maximum
Low operating current: 2.3mA (at fOSC = 52kHz)
Fast, cycle-by-cycle overcurrent limiting: 35ns
Peak driving current: ±1A. Rail-to-rail output:
- 25ns rise time
- 20ns fall time
±1% accurate 2.5V error amplifier reference
Trimmed oscillator discharge current
Undervoltage lockout protections
VSSOP-8 package minimizes board space

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.

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UCC28C42

現行

工業用 20-V、低功耗電流模式 PWM 控制器、14.5-V/9-V UVLO、100% 工作週期 Wider temperature range

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重要文件	類型	標題	格式選項
*	資料表	UCCx8C4x BiCMOS Low-Power Current-Mode PWM Controller datasheet (Rev. I)	PDF \| HTML	2024/6/13
	功能安全資訊	UCCx8C4x Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	2022/9/12
	應用說明	High Density Auxiliary Power Supply Using a SiC MOSFET for 800-V Traction Invert	PDF \| HTML	2022/7/6
	應用說明	Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A)	PDF \| HTML	2021/6/11
	應用說明	Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)		2019/3/12
	選擇指南	Power Management Guide 2018 (Rev. R)		2018/6/25
	應用說明	UCC38C44 12-V Isolated Bias Supply (Rev. A)		2008/10/9
	使用指南	UCC38C42 30-W Synchronous Buck Converter Reference Design		2003/2/4
	使用指南	UCC3961/UCC38C43 Reference Design		2002/11/19
	應用說明	UCC38C42 25-W Forward Converter		2002/9/6
	應用說明	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		2002/2/7
	更多文件說明	Seminar 900 Topic 6 - High Power Factor Prereg Using SEPIC		2001/2/15
	更多文件說明	Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors		2001/2/15
	更多文件說明	Seminar 300 Topic 8 - Switching Power Supply Design Review		2001/2/15
	應用說明	DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802		1999/9/5
	應用說明	U-111, Practical Considerations in Current Mode Power Supplies		1999/9/5
	應用說明	DN-30 Programmable Electronic Circuit Breaker		1999/9/5
	應用說明	DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode		1999/9/5

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