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參數(shù)資料
| 型號(hào)： | UC3886D |
| 英文描述： | Quad exclusive OR gate |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大小： | 196K |
| 代理商： | UC3886D |
UC2886
UC3886
SLUS231 - JUNE 1998
Average Current Mode PWM Controller IC
BLOCK DIAGRAM
UDG-95098-2
application
INFO
available
DESCRIPTION
The UC3886 family of PWM controller ICs is designed for DC-to-DC con-
verters with average current mode control. It is designed for use in con-
junction with the UC3910 4-bit DAC and Voltage Monitor. The UC3886
drives an external N-channel MOSFET and can be used to power the In-
tel Pentium Pro and other high-end microprocessors.
The UC3886 in conjunction with the UC3910 converts 5VDC to an adjust-
able output ranging from 2.0V to 3.5V in 100mV steps with 35mV DC sys-
tem accuracy.
The oscillator is programmed by the user’s selection of an external resis-
tor and capacitor, and is designed for 300kHz typical operation.
The voltage and current amplifiers have 3.5MHz gain-bandwidth product
to satisfy high performance system requirements.
The internal current sense amplifier permits the use of a low value current
sense resistor, minimizing power loss. It has inputs and outputs accessi-
ble to allow user-selection of gain-setting resistors, and is internally com-
pensated for a gain of 5 and above. The command voltage input is
buffered and provided for use as the reference for the current sense am-
plifier.
The output of the voltage amplifier (input to the current amplifier) is
clamped to 1 volt above the command voltage to serve as a current limit.
The gate output can be disabled by bringing the CAO/ENBL pin to below
0.8 volts.
FEATURES
10.3V - 20V Operating Range
Low Offset Voltage Amplifier
High Bandwidth Current and Voltage
Amplifiers
Low Offset Current Sense Amplifier
Undervoltage Lockout
Trimmed 5 Volt Reference
Externally Programmable Oscillator
Charge Current
1.5A Peak Totem Pole Output
Available in 16-pin DIL or SOIC
Packages
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3886DG4 | 功能描述:電流型 PWM 控制器 Avg Current Mode IC 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 |
| UC3886DTR | 功能描述:電流型 PWM 控制器 Avg Current Mode IC 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 |
| UC3886DTRG4 | 功能描述:電流型 PWM 控制器 Avg Current Mode IC 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 |
| UC3886N | 功能描述:電流型 PWM 控制器 Avg Current Mode IC 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 |
| UC3886NG4 | 功能描述:電流型 PWM 控制器 Avg Current Mode IC 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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