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| 型号： | UCC2892PWR |
| 厂商： | Texas Instruments |
| 文件页数： | 1/41页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO 16-TSSOP |
| 标准包装： | 2,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 74% |
| 电源电压： | 8.5 V ~ 16 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
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UCC2891, UCC2892
UCC2893, UCC2894
SLUS542F ? OCTOBER 2003 ? REVISED JULY 2009
CURRENT MODE
ACTIVE CLAMP PWM CONTROLLER
FEATURES
D Low Output Jitter
D Soft?Stop Shutdown of MAIN and AUX
D Ideal for Active Clamp/Reset Forward,
DESCRIPTION
The UCC2891/2/3/4 family of PWM controllers is
designed to simplify implementation of the various
active clamp/reset switching power topologies.
D
D
D
D
D
D
D
D
D
Flyback Converters
Provides Complementary Auxiliary Driver
with Programmable Deadtime (Turn-On
Delay) between AUX and MAIN Switches
Peak Current-Mode Control with
Cycle-by-Cycle Current Limiting
110-V Input Startup Regulator on UCC2891/3
TrueDrive t 2-A Sink, 2-A Source Outputs
Accurate Line UV and Line OV Threshold
Programmable Slope Compensation
1.0-MHz Synchronizable Oscillator
Precise Programmable Maximum Duty Cycle
Programmable Soft Start
The UCC289x is a peak current-mode, fixed-
frequency, high-performance pulse width modulator.
It includes the logic and the drive capability for the
auxiliary switch with a simple method of
programming the critical delays for proper active
clamp operation.
The UCC2891/3 includes a 110-V start-up
regulator for initial start-up and to provide
keep-alive power during stand-by.
Additional features include an internal
programmable slope compensation circuit,
precise D MAX limit, and a single resistor
programmable synchronizable oscillator. An
accurate line monitoring function also programs
the converter ’s ON and OFF transitions with
APPLICATIONS
D 150-W to 700-W SMPS
D High-Efficiency, Low EMI/RFI Off-Line or
DC/DC Converters
regard to the bulk input voltage. Along with the
UCC2897, this UCC289x family allows the power
supply designer to eliminate many of the external
components, reducing the size and complexity of
the design.
D
D
Server, 48-V Telecom, Datacom
High Power Adapter, LCD-TV and PDP-TV
BIAS
R DEL
R ON
1
UCC2891
RDEL
VIN
16
WINDING
C BULK
+VIN
D3
Q4
D4
Lo
Co
LOAD
2
RTON
LINE UV
15
R OFF
3
RTOFF
VDD
14
C BIAS
R OUT
C CLAMP
Q1
D1
Q3
4
VREF
OUT
13
SR
C VREF
5
SYNC
AUX
12
C AUX
Q2
D2
DRIVE
6
GND
PGND
11
R CS
CF
7
CS
SS/SD
10
C SS
D AUX
R SLOPE
8
RSLOPE
FB
9
RF
SECONDARY
SIDE E/A
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright ? 2003 ? 2009, Texas Instruments Incorporated
1
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相关代理商/技术参数 |
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|---|---|
| UCC2892PWRG4 | 功能描述:电流型 PWM 控制器 UCC289x Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2893D | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2893DG4 | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2893DR | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2893DRG4 | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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