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參數(shù)資料
| 型號(hào)： | UC2845AQTR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OMNIFET II: FULLY AUTOPROTECTED POWER MOSFET |
| 中文描述： | 電流模式開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大?。?/td> | 517K |
| 代理商： | UC2845AQTR |
9/94
Optimized for Off-line and DC to DC
Converters
Low Start Up Current (<0.5mA)
Trimmed Oscillator Discharge Current
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
Current Mode PWM Controller
The UC1842A/3A/4A/5A family of control ICs is a pin for pin compat-
ible improved version of the UC3842/3/4/5 family. Providing the nec-
essary features to control current mode switched mode power
supplies, this family has the following improved features. Start up cur-
rent is guaranteed to be less than 0.5mA. Oscillator discharge is
trimmed to 8.3mA. During under voltage lockout, the output stage can
sink at least 10mA at less than 1.2V for V
CC
over 5V.
The difference between members of this family are shown in the table
below.
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
BLOCK DIAGRAM
FEATURES
DESCRIPTION
Part #
UVLO On
UVLO Off
Maximum Duty
Cycle
<100%
<100%
<50%
<50%
UC1842A
UC1843A
UC1844A
UC1845A
16.0V
8.5V
16.0V
8.5V
10.0V
7.9V
10.0V
7.9V
Note 1: A/B
Note 2: Toggle flip flop used only in 1844A and 1845A.
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| UC2845AY | 制造商:Microsemi Corporation 功能描述:UC2845AY - Bulk |
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| UC2845BD | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM RoHS:否 制造商:Texas Instruments 開關(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 |
| UC2845BD1 | 功能描述:電流型 PWM 控制器 0.5mA Current Mode RoHS:否 制造商:Texas Instruments 開關(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 |
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