- 您現(xiàn)在的位置：買賣IC網 > PDF目錄381152 > UC2871QTR Quad intelligent power low side switch PDF資料下載
參數資料
| 型號： | UC2871QTR |
| 英文描述： | Quad intelligent power low side switch |
| 中文描述： | 諧振模式開關電源控制器 |
| 文件頁數： | 5/6頁 |
| 文件大?。?/td> | 490K |
| 代理商： | UC2871QTR |
A unique protection feature incorporated in the UC3871
is the Open Lamp Detect circuit. An open lamp interrupts
the current feedback loop and causes very high secon-
dary voltage. Operation in this mode will usually break-
down the transformer’s insulation, causing permanent
damage to the converter. The open lamp detect circuit,
shown in Figure 3 senses the lamp current feedback sig-
nal at the error amplifiers input, and shuts down the out-
puts if insufficient signal is present. Soft-start circuitry
limits initial turn-on currents and blanks the open lamp
detect signal.
Other features are included to minimize external circuitry
requirements. A logic level enable pin shuts down the IC,
allowing direct connection to the battery. During shut-
down, the IC typically draws less than 1
μ
A. The UC3871,
operating from 4.5V to 20V, is compatible with almost all
battery voltages used in portable computers. Under-volt-
age lockout circuitry disables operation until sufficient
supply voltage is available, and a 1% voltage reference
insures accurate operation. Both inputs to the LCD sup-
ply error amplifier are uncommitted, allowing positive or
negative supply loop closure without additional circuitry.
The LCD supply modulator also incorporates cycle-by-
cycle current limiting for added protection.
Figure 3
UC1871
UC2871
UC3871
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD.
MERRIMACK, NH 03054
TEL. (603) 424-2410
FAX (603) 424-3460
APPLICATION INFORMATION (cont.)
Figure 2
UC1871 Open Lamp Detect Circuitry
UC3871 Oscillator Section
5
Powered by ICminer.com Electronic-Library Service CopyRight 2003
相關PDF資料 |
PDF描述 |
|---|---|
| UC2874DWTR-1 | CAR ALTERNATOR VOLTAGE REGULATOR |
| UC2874DWTR-2 | Hall-effect pickup ignition controller |
| UC2874QTR-1 | Magnetic pickup ignition controller |
| UC2874QTR-2 | Magnetic pickup ignition controller |
| UC2875DWP | Hall effect pickup ignition controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UC2872DW | 功能描述:顯示驅動器和控制器 Resonant Lamp Ballast Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2872DWG4 | 功能描述:顯示驅動器和控制器 Resonant Lamp Ballast Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2872DWTR | 功能描述:顯示驅動器和控制器 Resonant Lamp Ballast Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2872DWTRG4 | 功能描述:顯示驅動器和控制器 Resonant Lamp Ballast Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2872N | 功能描述:顯示驅動器和控制器 Resonant Lamp Ballast Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。