UCC28221 具有可编程最大占空比的双路交错 PWM 控制器

	UCC28221
Topology	Flyback, Forward
Control Method	Current Mode
Duty Cycle(Max)(%)	90
Frequency(Max)(kHz)	2000
UVLO Thresholds On/Off(V)	13.0/8.0
Pin/Package	16SOIC, 20TSSOP
Regulated Outputs(#)	2
Operating Temperature Range(°C)	-40 to 105
Rating	Catalog

UCC28221 描述

The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.

UCC28221 has an UVLO turn-on threshold of 10 V for use in 12-V supplies while UCC28221 has a turn-on threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turn-off thresholds.

Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high voltage 110-V internal JFET for easier startup for the wider hysteresis UCC28221 version.

UCC28221 特性

• 2-MHz High Frequency Oscillator with 1-MHz Operation Per Channel
• Matched Internal Slope Compensation Circuits
• Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
• Peak Current Mode Control with Cycle-by-Cycle Current Limit
• Current Sense Discharge Transistor for Improved Noise Immunity
• Accurate Line Under and Over-Voltage Sense with Programmable Hysteresis
• Opto-Coupler Interface
• 110-V Internal Start-Up JFET (UCC28220)
• Operates from 12-V Supply (UCC28221)
• Programmable Soft-Start
• APPLICATIONS
  • High Output Current (50-A to 100-A) Converters
  • Maximum Power Density Designs
  • High Efficiency 48-V Input with Low Output Ripple Converters
  • High Power Offline, Telecom and Datacom Power Supplies

UCC28221 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
UCC28221D	ACTIVE	-40 to 105	1.85 | 1ku	SOIC (D) | 16	40 | TUBE	28221
UCC28221DG4	ACTIVE	-40 to 105	1.85 | 1ku	SOIC (D) | 16	40 | TUBE	28221
UCC28221DR	ACTIVE	-40 to 105	1.70 | 1ku	SOIC (D) | 16	2500 | LARGE T&R	28221
UCC28221DRG4	ACTIVE	-40 to 105	1.70 | 1ku	SOIC (D) | 16	2500 | LARGE T&R	28221
UCC28221PW	ACTIVE	-40 to 105	2.20 | 1ku	TSSOP (PW) | 20	90 | TUBE	28221
UCC28221PWG4	ACTIVE	-40 to 105	2.20 | 1ku	TSSOP (PW) | 20	90 | TUBE	28221
UCC28221PWR	ACTIVE	-40 to 105	1.70 | 1ku	TSSOP (PW) | 20	2000 | LARGE T&R	28221
UCC28221PWRG4	ACTIVE	-40 to 105	1.70 | 1ku	TSSOP (PW) | 20	2000 | LARGE T&R	28221

UCC28221 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
UCC28221D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC28221D
UCC28221DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC28221DG4	UCC28221DG4
UCC28221DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC28221DR
UCC28221DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC28221DRG4	UCC28221DRG4
UCC28221PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC28221PW
UCC28221PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC28221PWG4	UCC28221PWG4
UCC28221PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC28221PWR
UCC28221PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC28221PWRG4	UCC28221PWRG4

UCC28221 应用技术支持与电子电路设计开发资源下载

1. UCC28221 数据资料 dataSheet 下载.PDF
2. TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
3. Dual MOSFET Driver (PDF 498 KB)
4. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
5. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
6. 所选封装材料的热学和电学性质 (PDF 645 KB)
7. 高速数据转换 (PDF 1967 KB)
8. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
9. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
10. Principles of Data Acquisition and Conversion (PDF 50 KB)
11. Interleaving Analog-to-Digital Converters (PDF 64 KB)
12. What Designers Should Know About Data Converter Drift (PDF 95 KB)
13. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
14. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

UCC28221 工具与软件

名称	型号	公司	工具/软件类型
音频的快速搜索选择工具	AUDIO_SELECTION_TOOL	Texas Instruments	免费评估工具
UCC28221 200W 评估模块	UCC28221EVM	Texas Instruments	开发电路板/EVM
UCC28528 评估模块	UCC28528EVM	Texas Instruments	开发电路板/EVM
UCC28221 MathCAD 计算实用程序	UCC28221-CALC	Texas Instruments	计算实用程序
UCC28220 评估模块	UCC28220EVM	Texas Instruments	开发电路板/EVM
用于音频转换器的软件驱动程序	CODECDRIVERS-SW	Texas Instruments	应用软件