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UCC2897ARGP PDF预览

UCC2897ARGP

更新时间： 2024-11-04 21:18:11
品牌 Logo 应用领域
德州仪器 - TI 开关
页数 文件大小 规格书
39页 990K
描述
2.5A SWITCHING CONTROLLER, 270kHz SWITCHING FREQ-MAX, PQCC20, GREEN, PLASTIC, QFN-20

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UCC2897ARGP 技术参数

生命周期：Obsolete零件包装代码：QFN
包装说明：HVQCCN,针数：20
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.23
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：16 V
最小输入电压：8.5 V标称输入电压：12 V
JESD-30 代码：S-PQCC-N20JESD-609代码：e4
长度：4 mm功能数量：1
端子数量：20最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：2.5 A
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态：Not Qualified座面最大高度：1 mm
表面贴装：YES切换器配置：SINGLE
最大切换频率：270 kHz温度等级：AUTOMOTIVE
端子面层：NICKEL PALLADIUM GOLD端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
宽度：4 mmBase Number Matches：1

UCC2897ARGP 数据手册

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SLUS591G − NOVEMBER 2003 − REVISED DECEMBER 2008  
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FEATURES  
DESCRIPTION  
D
D
Ideal for Active Clamp/Reset Forward,  
Flyback and Synchronous Rectifier Apps  
The UCC2897 PWM controller simplifies  
implementation of the various active clamp/reset  
and synchronous rectifier switching power  
topologies.  
Provides Complementary Auxiliary Driver  
with Programmable Deadtime (Turn-On  
Delay) between AUX and MAIN Switches  
Based on the UCC2891 active-clamp controller  
the UCC2897 is a peak current-mode, fixed-  
frequency, high-performance pulse width modulator.  
It includes the logic and the drive capability for the  
P-channel auxiliary switch along with a simple  
method of programming the critical delays for  
proper active clamp operation.  
D
Peak Current-Mode Control with 0.5-V  
Cycle-by-Cycle Current Limiting  
D
D
D
D
Hiccup Mode 0.75-V Current Limit  
TrueDrivet 2-A Sink, 2-A Source Outputs  
110-V Input Startup Device  
Trimmed Internal Bandgap Reference for  
Accurate Line UV and Line OV Threshold  
Features include an internal programmable slope  
compensation circuit, precise D  
limit, and a  
D
Programmable Slope Compensation  
MAX  
synchronizable oscillator with an internal timing  
capacitor. An accurate line monitoring function  
also programs the converter’s ON and OFF  
transitions with regard to the bulk input voltage.  
D
High-Performance 1.0-MHz Synchronizable  
Oscillator with Internal Timing Capacitor  
D
D
Precise Programmable Maximum Duty Cycle  
PB-Free Lead Finish Package  
The UCC2897 adds a second level hiccup mode  
current  
sense  
threshold,  
bi-directional  
APPLICATIONS  
synchronization and the input overvoltage  
protection functionalities that are not available on  
the 16-pin UCC2891. The UCC2897 is offered in  
20-pin TSSOP (PW) and 20-pin QFN (RTJ)  
package.  
D
High-Efficiency DC/DC Power Supplies  
D
Server Power, 48-V Telecom, Datacom, and  
42-V Automotive Applications  
TYPICAL APPLICATION DIAGRAM  
BIAS  
WINDING  
UCC2897  
+VIN  
VIN  
1
3
RDEL  
C
BULK  
LINEOV  
19  
18  
LOAD  
4
5
6
7
8
9
RTON  
RTOFF  
VREF  
LINEUV  
VDD 17  
C
Q1  
CLAMP  
PVDD 16  
SR  
DRIVE  
Q2  
R
SYNC  
GND  
CS  
15  
OUT  
14  
AUX  
CS  
10 RSLOPE PGND 13  
12 SS/SD FB 11  
SECONDARY  
SIDE E/A  
R
F
UDG−03186  
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Copyright 2006 − 2008, Texas Instruments Incorporated  
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1
www.ti.com  
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