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參數(shù)資料
| 型號(hào)： | UC3879N |
| 英文描述： | Octal D-type latch with 3 state outputs (non inverted) |
| 中文描述： | 電流/電壓模式開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大?。?/td> | 373K |
| 代理商： | UC3879N |
6/98
FEATURES
Programmable Output Turn On
Delay; Zero Delay Available
Compatible with Voltage Mode or
Current Mode Topologies
Practical Operation at Switching
Frequencies to 300kHz
Four 100mA Totem Pole Outputs
10MHz Error Amplifier
Pin Programmable Undervoltage
Lockout
Low Startup Current - 150
μ
A
Soft Start Control
Outputs Active Low During UVLO
Phase Shift Resonant Controller
BLOCK DIAGRAM
UDG-94070-1
UC1879
UC2879
UC3879
DESCRIPTION
The UC3879 controls a bridge power stage by phase shifting the switching
of one half-bridge with respect to the other. This allows constant frequency
pulse width modulation in combination with resonant, zero-voltage switching
for high efficiency performance. The UC3879 can be configured to provide
control in either voltage mode or current mode operation, with overcurrent
shutdown for fast fault protection.
Independently programmable time delays provide dead-time at the turn-on
of each output stage, allowing time for each resonant switching interval.
With the oscillator capable of operating in excess of 600kHz, overall output
switching frequencies to 300kHz are practical. In addition to the standard
free running mode, with the CLKSYNC pin, the user may configure the
UC3879 to accept an external clock synchronization signal. Alternatively, up
to three units can be locked together with the operational frequency deter-
mined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protec-
tion. Additional features include a 10MHz error amplifier, a 5V precision ref-
erence, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q
and 28 pin L packages.
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PDF描述 |
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| UC3879Q | Octal D-type flip-flop with 3 state outputs (non inverted) |
| UC2886J | Bluetooth class 2 module with embedded SPP SW |
| UC1886J | Multifunction quad power amplifier with built-in diagnostics features |
| UC2886N | Bluetooth class 2 module with embedded HCI FW |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3879N | 制造商:Texas Instruments 功能描述:Pulse Width Modulation (PWM) Controller 制造商:UNITRODE 功能描述:PHASE SHIFT RESONT CONT 3879 DIP |
| UC3879NG4 | 功能描述:軟開關(guān) PWM 控制器 Phase Shift Resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| UC3886D | 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 |
| 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 |
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