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參數資料
| 型號： | UCC2888DTR |
| 英文描述： | Precision 1 A regulators |
| 中文描述： | 電壓模式開關電源控制器 |
| 文件頁數： | 1/19頁 |
| 文件大?。?/td> | 296K |
| 代理商： | UCC2888DTR |
SLUS458C AUGUST 2001 REVISED SEPTEMBER 2003
1
www.ti.com
FEATURES
Enhanced Replacement for UC3842A Family
With Pin-to-Pin Compatibility
1-MHz Operation
50-
μ
A Standby Current, 100-
μ
A Maximum
Low Operating Current of 2.3 mA at 52 kHz
Fast 35-ns Cycle-by-Cycle Overcurrent
Limiting
±
1-A Peak Output Current
Rail-to-Rail Output Swings with 25-ns Rise
and 20-ns Fall Times
±
1% Initial Trimmed 2.5-V Error Amplifier
Reference
Trimmed Oscillator Discharge Current
New Under Voltage Lockout Versions
MSOP-8 Package Minimizes Board Space
APPLICATIONS
Switch-Mode Power Supplies
dc-to-dc Converters
Board Mount Power Modules
DESCRIPTION
UCC38C4x family is a high-performance current-
mode PWM controller. It is an enhanced BiCMOS
version with pin-for-pin compatibility to the
industry standard UC384xA family and UC384x
family of PWM controllers. In addition, lower
startup voltage versions of 7 V are offered as
UCC38C40 and UCC38C41.
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 1 MHz with low start-up and
operating currents, thus minimizing start-up loss
and low operating power consumption for
improved efficiency. The device also features a
very fast current-sense-to-output delay time of
35 ns and a
±
1 A peak output current capability
with improved rise and fall times for driving large
external MOSFETs directly.
The UCC38C4x family is offered in 8-pin
packages, MSOP (DGK), SOIC (D) and PDIP (P).
FUNCTIONAL BLOCK DIAGRAM
UDG99139
8
2
4
7
VREF
Note: Toggle flipflop used only in UCC38C41, UCC38C44, and UCC38C45.
VREF
RT/CT
+
VDD
5
GND
6
OUT
OSC
T
S
Q
Q
R
FB
2R
R
1V
1
COMP
3
CS
UVLO
ERROR AMP
(NOTE)
+
+
5.0 V
2.5 V
VREF
GOOD LOGIC
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Copyright
2003, Texas Instruments Incorporated
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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| UCC2889D | 功能描述:電壓模式 PWM 控制器 Off-line Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC2889DG4 | 功能描述:電壓模式 PWM 控制器 Off-line Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC2889DTR | 功能描述:電壓模式 PWM 控制器 Off-line Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| UCC2889DTR/81361 | 制造商:Texas Instruments 功能描述: |
| UCC2889DTRG4 | 功能描述:電壓模式 PWM 控制器 Off-line Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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