- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379467 > UC2842AD (ON SEMICONDUCTOR) HIGH PERFORMANCE CURRENT MODE CONTROLLERS PDF資料下載
參數(shù)資料
| 型號(hào)： | UC2842AD |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, SOIC-14 |
| 文件頁(yè)數(shù)： | 1/19頁(yè) |
| 文件大?。?/td> | 937K |
| 代理商： | UC2842AD |
當(dāng)前第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
Current Mode PWM Controller
FEATURES
Optimized For Off-line And DC
To DC Converters
Low Start Up Current (<1mA)
Automatic Feed Forward
Compensation
Pulse-by-pulse Current Limiting
Enhanced Load Response
Characteristics
Under-voltage Lockout With
Hysteresis
Double Pulse Suppression
High Current Totem Pole
Output
Internally Trimmed Bandgap
Reference
500khz Operation
Low R
O
Error Amp
DESCRIPTION
The UC1842/3/4/5 family of control ICs provides the necessary features to
implement off-line or DC to DC fixed frequency current mode control schemes
with a minimal external parts count. Internally implemented circuits include
under-voltage lockout featuring start up current less than 1mA, a precision
reference trimmed for accuracy at the error amp input, logic to insure latched
operation, a PWM comparator which also provides current limit control, and a
totem pole output stage designed to source or sink high peak current. The
output stage, suitable for driving N Channel MOSFETs, is low in the off state.
Differences between members of this family are the under-voltage lockout
thresholds and maximum duty cycle ranges. The UC1842 and UC1844 have
UVLO thresholds of 16V (on) and 10V (off), ideally suited to off-line
applications. The corresponding thresholds for the UC1843 and UC1845 are
8.4V and 7.6V. The UC1842 and UC1843 can operate to duty cycles
approaching 100%. A range of zero to 50% is obtained by the UC1844 and
UC1845 by the addition of an internal toggle flip flop which blanks the output
off every other clock cycle.
BLOCK DIAGRAM
A/B
Note 1:
Note 2:
A = DIL-8 Pin Number. B = SO-14 and CFP-14 Pin Number.
Toggle flip flop used only in 1844 and 1845.
SLUS223A - APRIL 1997 - REVISED MAY 2002
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC2842AN | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC2842BD | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC2842BN | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC2842AD | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC2842BD1 | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC2842AD1 | 制造商:STMicroelectronics 功能描述:IC CURRENT MODE PWM 2842 SOIC8 |
| UC2842AD1013TR | 制造商:STMicroelectronics 功能描述: |
| UC2842AD13TR | 制造商:STMicroelectronics 功能描述: |
| UC2842AD8 | 功能描述:電流型 PWM 控制器 Current Mode RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC2842AD8G4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。