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UCC25600DR 参数 Datasheet PDF下载

UCC25600DR图片预览
型号: UCC25600DR
PDF下载: 下载PDF文件 查看货源
内容描述: 8引脚高性能谐振模式控制器 [8-Pin High-Performance Resonant Mode Controller]
分类和应用: 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管信息通信管理PC
文件页数/大小: 22 页 / 589 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SLUS846 – SEPTEMBER 2008
8-Pin High-Performance Resonant Mode Controller
1
FEATURES
Variable Switching Frequency Control
Programmable Minimum Switching Frequency
With 4% Accuracy (3% accuracy at
temperature range: -20°C to 105°C)
Programmable Maximum Switching Frequency
Programmable Dead Time for Best Efficiency
Programmable Soft-Start Time
Easy ON/OFF Control
Over-Current Protection
Over-Temperature Protection
Bias Voltage UVLO and OVP
Integrated Gate Driver With 0.4-A Source and
0.8-A Sink Capability
Operating Temperature Range: –40°C to 125°C
SOIC 8-Pin Package
DESCRIPTION
The UCC25600 high performance resonant mode
controller is designed for dc-to-dc applications
utilizing resonant topologies, especially the LLC half
bridge resonant converter. This highly integrated
controller implements frequency modulation control
and complete system functions in only an 8-pin
package. Switching to the UCC25600 will greatly
simplify the system design, layout and improve time
to market, all at a price point lower than competitive
16-pin device offerings.
The internal oscillator supports the switching
frequencies from 30 kHz to 350 kHz. This high
accuracy oscillator realizes the minimum switching
frequency limiting with 4% tolerance, allowing the
designer to avoid "over design" of the power stage
and, thus, further reducing overall system cost. The
programmable dead time enables zero-voltage
switching with minimum magnetizing current. This will
maximize system efficiency across a variety of
applications. The programmable soft-start timer
maximizes design flexibility demanded by the varied
requirements of end equipments utilizing a half bridge
topology. By incorporating 0.4-A source and 0.8-A
sink driving capability, a low cost, reliable gate driver
transformer is a real option.
The UCC25600 delivers complete system protection
functions including over current, UVLO, bias supply
OVP and over temperature protection.
APPLICATIONS
100-W to 1-kW Power Supplies
LCD, Plasma and DLP TVs
Adaptors, Computing and ATX Power Supplies
Home Audio Systems
Electronic Lighting Ballasts
TYPICAL APPLICATION DIAGRAM
*
*
*
Vs
8
GD1
OC
RT
3
2
1
4
5
7
6
GD2
UCC25600
VCC
DT
GND
SS
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated