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參數資料
| 型號： | UC3847DWTR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Current Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數： | 1/10頁 |
| 文件大?。?/td> | 648K |
| 代理商： | UC3847DWTR |
UC1846/7
UC2846/7
UC3846/7
SLUS352A - JANUARY 1997 - REVISED MARCH 2002
Automatic Feed Forward Compensation
Programmable Pulse-by-Pulse Current
Limiting
Automatic Symmetry Correction in Push-pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular
Power Systems
Differential Current Sense Amplifier with
Wide Common Mode Range
Double Pulse Suppression
500mA (Peak) Totem-pole Outputs
±
1% Bandgap Reference
Under-voltage Lockout
Soft Start Capability
Shutdown Terminal
500kHZ Operation
Current Mode PWM Controller
The UC1846/7 family of control ICs provides all of the necessary
features to implement fixed frequency, current mode control
schemes while maintaining a minimum external parts count. The
superior performance of this technique can be measured in im-
proved line regulation, enhanced load response characteristics, and
a simpler, easier-to-design control loop. Topological advantages in-
clude inherent pulse-by-pulse current limiting capability, automatic
symmetry correction for push-pull converters, and the ability to par-
allel “power modules" while maintaining equal current sharing.
Protection circuitry includes built-in under-voltage lockout and pro-
grammable current limit in addition to soft start capability. A shut-
down function is also available which can initiate either a complete
shutdown with automatic restart or latch the supply off.
Other features include fully latched operation, double pulse sup-
pression, deadline adjust capability, and a
±
1% trimmed bandgap
reference.
The UC1846 features low outputs in the OFF state, while the
UC1847 features high outputs in the OFF state.
BLOCK DIAGRAM
15
10
9
8
OSC
3
4
X3
+
5
6
E/A
7
COMP
INV
NI
C/S+
C/S-
CT
RT
SYNC
VIN
5.1 V
REFERENCE
REGULATOR
UVLO
LOCKOUT
2
VREF
13
11
VC
A OUT
14
12
B OUT
GND
Q
Q
T
S
S
R
Q
1
16
6 k
0.5 mA
350 mV
0.5 V
F/F
CURRENT
LIMIT ADJUST
SHUTDOWN
UC1846
Output Stage
UC1847
Output Inverted
COMP
FEATURES
DESCRIPTION
application
INFO
available
UDG-02057
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相關代理商/技術參數 |
參數描述 |
|---|---|
| UC3847DWTRG4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3847FN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| UC3847J | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3847N | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3847NG4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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